Merge remote-tracking branch 'upstream/develop' into StateBug

19 files changed, 2263 insertions, 1326 deletions

diff --git a/TestHelper.cpp b/TestHelper.cpp
index 68fdd748..ca46c2ca 100644
--- a/TestHelper.cpp
+++ b/TestHelper.cpp
@@ -65,7 +65,7 @@ void connectClients(Client& c1, Client& c2)
 namespace test
 {
 
-ImportTest::ImportTest(json_spirit::mObject& _o, bool isFiller):m_TestObject(_o)
+ImportTest::ImportTest(json_spirit::mObject& _o, bool isFiller): m_TestObject(_o)
 {
 	importEnv(_o["env"].get_obj());
 	importState(_o["pre"].get_obj(), m_statePre);
@@ -79,12 +79,12 @@ ImportTest::ImportTest(json_spirit::mObject& _o, bool isFiller):m_TestObject(_o)
 
 void ImportTest::importEnv(json_spirit::mObject& _o)
 {
-	assert(_o.count("previousHash") > 0);
-	assert(_o.count("currentGasLimit") > 0);
-	assert(_o.count("currentDifficulty") > 0);
-	assert(_o.count("currentTimestamp") > 0);
-	assert(_o.count("currentCoinbase") > 0);
-	assert(_o.count("currentNumber") > 0);
+	BOOST_REQUIRE(_o.count("previousHash") > 0);
+	BOOST_REQUIRE(_o.count("currentGasLimit") > 0);
+	BOOST_REQUIRE(_o.count("currentDifficulty") > 0);
+	BOOST_REQUIRE(_o.count("currentTimestamp") > 0);
+	BOOST_REQUIRE(_o.count("currentCoinbase") > 0);
+	BOOST_REQUIRE(_o.count("currentNumber") > 0);
 
 	m_environment.previousBlock.hash = h256(_o["previousHash"].get_str());
 	m_environment.currentBlock.number = toInt(_o["currentNumber"]);
@@ -103,10 +103,10 @@ void ImportTest::importState(json_spirit::mObject& _o, State& _state)
 	{
 		json_spirit::mObject o = i.second.get_obj();
 
-		assert(o.count("balance") > 0);
-		assert(o.count("nonce") > 0);
-		assert(o.count("storage") > 0);
-		assert(o.count("code") > 0);
+		BOOST_REQUIRE(o.count("balance") > 0);
+		BOOST_REQUIRE(o.count("nonce") > 0);
+		BOOST_REQUIRE(o.count("storage") > 0);
+		BOOST_REQUIRE(o.count("code") > 0);
 
 		Address address = Address(i.first);
 
@@ -115,11 +115,9 @@ void ImportTest::importState(json_spirit::mObject& _o, State& _state)
 
 		bytes code = importCode(o);
 
-		toInt(o["nonce"]);
-		if (toHex(code).size())
+		if (code.size())
 		{
 			_state.m_cache[address] = Account(toInt(o["balance"]), Account::ContractConception);
-			i.second.get_obj()["code"] = "0x" + toHex(code); //preperation for export
 			_state.m_cache[address].setCode(bytesConstRef(&code));
 		}
 		else
@@ -134,23 +132,17 @@ void ImportTest::importState(json_spirit::mObject& _o, State& _state)
 
 void ImportTest::importTransaction(json_spirit::mObject& _o)
 {
-	assert(_o.count("nonce")> 0);
-	assert(_o.count("gasPrice") > 0);
-	assert(_o.count("gasLimit") > 0);
-	assert(_o.count("to") > 0);
-	assert(_o.count("value") > 0);
-	assert(_o.count("secretKey") > 0);
-	assert(_o.count("data") > 0);
-
-	m_transaction.nonce = toInt(_o["nonce"]);
-	m_transaction.gasPrice = toInt(_o["gasPrice"]);
-	m_transaction.gas = toInt(_o["gasLimit"]);
-	m_transaction.receiveAddress = Address(_o["to"].get_str());
-	m_transaction.type = m_transaction.receiveAddress ? Transaction::MessageCall : Transaction::ContractCreation;
-	m_transaction.value = toInt(_o["value"]);
-	Secret secretKey = Secret(_o["secretKey"].get_str());
-	m_transaction.sign(secretKey);
-	m_transaction.data = importData(_o);
+	BOOST_REQUIRE(_o.count("nonce")> 0);
+	BOOST_REQUIRE(_o.count("gasPrice") > 0);
+	BOOST_REQUIRE(_o.count("gasLimit") > 0);
+	BOOST_REQUIRE(_o.count("to") > 0);
+	BOOST_REQUIRE(_o.count("value") > 0);
+	BOOST_REQUIRE(_o.count("secretKey") > 0);
+	BOOST_REQUIRE(_o.count("data") > 0);
+
+	m_transaction = _o["to"].get_str().empty() ?
+		Transaction(toInt(_o["value"]), toInt(_o["gasPrice"]), toInt(_o["gasLimit"]), importData(_o), toInt(_o["nonce"]), Secret(_o["secretKey"].get_str())) :
+		Transaction(toInt(_o["value"]), toInt(_o["gasPrice"]), toInt(_o["gasLimit"]), Address(_o["to"].get_str()), importData(_o), toInt(_o["nonce"]), Secret(_o["secretKey"].get_str()));
 }
 
 void ImportTest::exportTest(bytes _output, State& _statePost)
@@ -182,6 +174,29 @@ void ImportTest::exportTest(bytes _output, State& _statePost)
 		postState[toString(a.first)] = o;
 	}
 	m_TestObject["post"] = json_spirit::mValue(postState);
+
+	// export pre state
+	json_spirit::mObject preState;
+
+	for (auto const& a: m_statePre.addresses())
+	{
+		if (genesis.count(a.first))
+			continue;
+
+		json_spirit::mObject o;
+		o["balance"] = toString(m_statePre.balance(a.first));
+		o["nonce"] = toString(m_statePre.transactionsFrom(a.first));
+		{
+			json_spirit::mObject store;
+			for (auto const& s: m_statePre.storage(a.first))
+				store["0x"+toHex(toCompactBigEndian(s.first))] = "0x"+toHex(toCompactBigEndian(s.second));
+			o["storage"] = store;
+		}
+		o["code"] = "0x" + toHex(m_statePre.code(a.first));
+
+		preState[toString(a.first)] = o;
+	}
+	m_TestObject["pre"] = json_spirit::mValue(preState);
 }
 
 u256 toInt(json_spirit::mValue const& _v)
@@ -210,7 +225,7 @@ byte toByte(json_spirit::mValue const& _v)
 	return 0;
 }
 
-bytes importData(json_spirit::mObject & _o)
+bytes importData(json_spirit::mObject& _o)
 {
 	bytes data;
 	if (_o["data"].type() == json_spirit::str_type)
@@ -225,7 +240,7 @@ bytes importData(json_spirit::mObject & _o)
 	return data;
 }
 
-bytes importCode(json_spirit::mObject & _o)
+bytes importCode(json_spirit::mObject& _o)
 {
 	bytes code;
 	if (_o["code"].type() == json_spirit::str_type)
@@ -238,11 +253,11 @@ bytes importCode(json_spirit::mObject & _o)
 		code.clear();
 		for (auto const& j: _o["code"].get_array())
 			code.push_back(toByte(j));
-	}
+	}	
 	return code;
 }
 
-void checkOutput(bytes const& _output, json_spirit::mObject & _o)
+void checkOutput(bytes const& _output, json_spirit::mObject& _o)
 {
 	int j = 0;
 	if (_o["out"].type() == json_spirit::array_type)
diff --git a/TestHelper.h b/TestHelper.h
index d7ffe5cb..622b83ac 100644
--- a/TestHelper.h
+++ b/TestHelper.h
@@ -66,9 +66,9 @@ private:
 // helping functions
 u256 toInt(json_spirit::mValue const& _v);
 byte toByte(json_spirit::mValue const& _v);
-bytes importCode(json_spirit::mObject &_o);
-bytes importData(json_spirit::mObject &_o);
-void checkOutput(bytes const& _output, json_spirit::mObject &_o);
+bytes importCode(json_spirit::mObject& _o);
+bytes importData(json_spirit::mObject& _o);
+void checkOutput(bytes const& _output, json_spirit::mObject& _o);
 void checkStorage(std::map<u256, u256> _expectedStore, std::map<u256, u256> _resultStore, Address _expectedAddr);
 void executeTests(const std::string& _name, const std::string& _testPathAppendix, std::function<void(json_spirit::mValue&, bool)> doTests);
 std::string getTestPath();
diff --git a/createRandomTest.cpp b/createRandomTest.cpp
index 457478fd..a9a99377 100644
--- a/createRandomTest.cpp
+++ b/createRandomTest.cpp
@@ -31,7 +31,7 @@
 #include <json_spirit/json_spirit_writer_template.h>
 #include <libdevcore/CommonIO.h>
 #include <libdevcore/CommonData.h>
-#include <libevmface/Instruction.h>
+#include <libevmcore/Instruction.h>
 #include "vm.h"
 
 using namespace std;
diff --git a/crypto.cpp b/crypto.cpp
index 67286bfc..06e55658 100644
--- a/crypto.cpp
+++ b/crypto.cpp
@@ -28,6 +28,7 @@
 #include <libethereum/Transaction.h>
 #include <boost/test/unit_test.hpp>
 #include <libdevcrypto/EC.h>
+#include <libdevcrypto/SHA3MAC.h>
 #include "TestHelperCrypto.h"
 
 using namespace std;
@@ -46,107 +47,220 @@ BOOST_AUTO_TEST_CASE(common_encrypt_decrypt)
 	KeyPair k = KeyPair::create();
 	bytes cipher;
 	encrypt(k.pub(), bcr, cipher);
-	assert(cipher != asBytes(message) && cipher.size() > 0);
+	BOOST_REQUIRE(cipher != asBytes(message) && cipher.size() > 0);
 	
 	bytes plain;
 	decrypt(k.sec(), bytesConstRef(&cipher), plain);
 	
-	assert(asString(plain) == message);
-	assert(plain == asBytes(message));
+	BOOST_REQUIRE(asString(plain) == message);
+	BOOST_REQUIRE(plain == asBytes(message));
 }
 
 BOOST_AUTO_TEST_CASE(cryptopp_vs_secp256k1)
 {
-	ECIES<ECP>::Decryptor d(pp::PRNG(), pp::secp256k1());
+	ECIES<ECP>::Decryptor d(pp::PRNG, pp::secp256k1Curve);
 	ECIES<ECP>::Encryptor e(d.GetKey());
 	
 	Secret s;
-	pp::SecretFromDL_PrivateKey_EC(d.GetKey(), s);
+	pp::exportPrivateKey(d.GetKey(), s);
 	
 	Public p;
-	pp::PublicFromDL_PublicKey_EC(e.GetKey(), p);
+	pp::exportPublicKey(e.GetKey(), p);
 	
-	assert(dev::toAddress(s) == right160(dev::sha3(p.ref())));
+	BOOST_REQUIRE(dev::toAddress(s) == right160(dev::sha3(p.ref())));
 	
 	Secret previous = s;
-	for (auto i = 0; i < 30; i++)
+	for (auto i = 0; i < 2; i++)
 	{
-		ECIES<ECP>::Decryptor d(pp::PRNG(), pp::secp256k1());
+		ECIES<ECP>::Decryptor d(pp::PRNG, pp::secp256k1Curve);
 		ECIES<ECP>::Encryptor e(d.GetKey());
 		
 		Secret s;
-		pp::SecretFromDL_PrivateKey_EC(d.GetKey(), s);
-		assert(s != previous);
+		pp::exportPrivateKey(d.GetKey(), s);
+		BOOST_REQUIRE(s != previous);
 		
 		Public p;
-		pp::PublicFromDL_PublicKey_EC(e.GetKey(), p);
-
-		assert(dev::toAddress(s) == right160(dev::sha3(p.ref())));
+		pp::exportPublicKey(e.GetKey(), p);
+
+		h160 secp256k1Addr = dev::toAddress(s);
+		h160 cryptoppAddr = right160(dev::sha3(p.ref()));
+		if (secp256k1Addr != cryptoppAddr)
+		{
+			BOOST_REQUIRE(secp256k1Addr == cryptoppAddr);
+			break;
+		}
 	}
 }
 
-BOOST_AUTO_TEST_CASE(cryptopp_keys_cryptor_sipaseckp256k1)
+BOOST_AUTO_TEST_CASE(cryptopp_cryptopp_secp256k1libport)
 {
-	KeyPair k = KeyPair::create();
-	Secret s = k.sec();
-	
-	// Convert secret to exponent used by pp
-	Integer e = pp::ExponentFromSecret(s);
+	// cryptopp implementation of secp256k1lib sign_compact w/recid parameter and recovery of public key from signature
+		
+	// base secret
+	Secret secret(sha3("privacy"));
+	
+	// we get ec params from signer
+	const CryptoPP::DL_GroupParameters_EC<CryptoPP::ECP> params = pp::secp256k1Params;
+	ECDSA<ECP, SHA3_256>::Signer signer;
+	
+	// e := sha3(msg)
+	bytes e(fromHex("0x01"));
+	e.resize(32);
+	int tests = 2; // Oct 29: successful @ 1500
+	while (sha3(&e, &e), secret = sha3(secret.asBytes()), tests--)
+	{
+		KeyPair key(secret);
+		Public pkey = key.pub();
+		pp::initializeDLScheme(secret, signer);
+		
+		h256 he(sha3(e));
+		Integer heInt(he.asBytes().data(), 32);
+		h256 k(crypto::kdf(secret, he));
+		Integer kInt(k.asBytes().data(), 32);
+		kInt %= params.GetSubgroupOrder()-1;
+
+		ECP::Point rp = params.ExponentiateBase(kInt);
+		Integer const& q = params.GetGroupOrder();
+		Integer r = params.ConvertElementToInteger(rp);
+		int recid = ((r >= q) ? 2 : 0) | (rp.y.IsOdd() ? 1 : 0);
+
+		Integer kInv = kInt.InverseMod(q);
+		Integer s = (kInv * (Integer(secret.asBytes().data(), 32)*r + heInt)) % q;
+		BOOST_REQUIRE(!!r && !!s);
+		
+/*
+		// For future reference:
+		// According to maths, this codepath can't be reached, however, it's in secp256k1.
+		// Commenting this out diverges from codebase implementation.
+		// To be removed after upstream PR and proof are evaulated.
+ 
+		if (s > params.GetSubgroupOrder())
+		{
+			// note: this rarely happens
+			s = params.GetGroupOrder() - s;
+			if (recid)
+				recid ^= 1;
+		}
+ */
 
-	// Test that exported DL_EC private is same as exponent from Secret
-	CryptoPP::DL_PrivateKey_EC<CryptoPP::ECP> privatek;
-	privatek.AccessGroupParameters().Initialize(pp::secp256k1());
-	privatek.SetPrivateExponent(e);
-	assert(e == privatek.GetPrivateExponent());
-	
-	// Test that exported secret is same as decryptor(privatek) secret
-	ECIES<ECP>::Decryptor d;
-	d.AccessKey().AccessGroupParameters().Initialize(pp::secp256k1());
-	d.AccessKey().SetPrivateExponent(e);
-	assert(d.AccessKey().GetPrivateExponent() == e);
-	
-	// Test that decryptor->encryptor->public == private->makepublic->public
-	CryptoPP::DL_PublicKey_EC<CryptoPP::ECP> pubk;
-	pubk.AccessGroupParameters().Initialize(pp::secp256k1());
-	privatek.MakePublicKey(pubk);
-	
-	ECIES<ECP>::Encryptor enc(d);
-	assert(pubk.GetPublicElement() == enc.AccessKey().GetPublicElement());
-	
-	// Test against sipa/seckp256k1
-	Public p;
-	pp::PublicFromExponent(pp::ExponentFromSecret(s), p);
-	assert(toAddress(s) == dev::right160(dev::sha3(p.ref())));
-	assert(k.pub() == p);
+		Signature sig;
+		r.Encode(sig.data(), 32);
+		s.Encode(sig.data() + 32, 32);
+		sig[64] = recid;
+
+		Public p = dev::recover(sig, he);
+		BOOST_REQUIRE(p == pkey);
+		
+		// verify w/cryptopp
+		BOOST_REQUIRE(crypto::verify(pkey, sig, bytesConstRef(&e)));
+		
+		// verify with secp256k1lib
+		byte encpub[65] = {0x04};
+		memcpy(&encpub[1], pkey.data(), 64);
+		byte dersig[72];
+		size_t cssz = DSAConvertSignatureFormat(dersig, 72, DSA_DER, sig.data(), 64, DSA_P1363);
+		BOOST_CHECK(cssz <= 72);
+		BOOST_REQUIRE(1 == secp256k1_ecdsa_verify(he.data(), sizeof(he), dersig, cssz, encpub, 65));
+	}
+}
+
+BOOST_AUTO_TEST_CASE(cryptopp_ecdsa_sipaseckp256k1)
+{
+	// cryptopp integer encoding
+	Integer nHex("f2ee15ea639b73fa3db9b34a245bdfa015c260c598b211bf05a1ecc4b3e3b4f2H");
+	Integer nB(fromHex("f2ee15ea639b73fa3db9b34a245bdfa015c260c598b211bf05a1ecc4b3e3b4f2").data(), 32);
+	BOOST_REQUIRE(nHex == nB);
+	
+	bytes sbytes(fromHex("0x01"));
+	Secret secret(sha3(sbytes)); // 5fe7f977e71dba2ea1a68e21057beebb9be2ac30c6410aa38d4f3fbe41dcffd2
+	KeyPair key(secret);
+	
+	bytes m(fromHex("0x01"));
+	int tests = 2;
+	while (m[0]++, tests--)
+	{
+		h256 hm(sha3(m));
+		Integer hInt(hm.asBytes().data(), 32);
+		h256 k(hm ^ key.sec());
+		Integer kInt(k.asBytes().data(), 32);
+		
+		// raw sign w/cryptopp (doesn't pass through cryptopp hash filter)
+		ECDSA<ECP, SHA3_256>::Signer signer;
+		pp::initializeDLScheme(key.sec(), signer);
+		Integer r, s;
+		signer.RawSign(kInt, hInt, r, s);
+
+		// verify cryptopp raw-signature w/cryptopp
+		ECDSA<ECP, SHA3_256>::Verifier verifier;
+		pp::initializeDLScheme(key.pub(), verifier);
+		Signature sigppraw;
+		r.Encode(sigppraw.data(), 32);
+		s.Encode(sigppraw.data() + 32, 32);
+		BOOST_REQUIRE(verifier.VerifyMessage(m.data(), m.size(), sigppraw.data(), 64));
+		BOOST_REQUIRE(crypto::verify(key.pub(), sigppraw, bytesConstRef(&m)));
+		BOOST_REQUIRE(dev::verify(key.pub(), sigppraw, hm));
+		
+		// sign with cryptopp, verify, recover w/sec256lib
+		Signature seclibsig(dev::sign(key.sec(), hm));
+		BOOST_REQUIRE(verifier.VerifyMessage(m.data(), m.size(), seclibsig.data(), 64));
+		BOOST_REQUIRE(crypto::verify(key.pub(), seclibsig, bytesConstRef(&m)));
+		BOOST_REQUIRE(dev::verify(key.pub(), seclibsig, hm));
+		BOOST_REQUIRE(dev::recover(seclibsig, hm) == key.pub());
+
+		// sign with cryptopp (w/hash filter?), verify with cryptopp
+		bytes sigppb(signer.MaxSignatureLength());
+		size_t ssz = signer.SignMessage(pp::PRNG, m.data(), m.size(), sigppb.data());
+		Signature sigpp;
+		memcpy(sigpp.data(), sigppb.data(), 64);
+		BOOST_REQUIRE(verifier.VerifyMessage(m.data(), m.size(), sigppb.data(), ssz));
+		BOOST_REQUIRE(crypto::verify(key.pub(), sigpp, bytesConstRef(&m)));
+		BOOST_REQUIRE(dev::verify(key.pub(), sigpp, hm));
+
+		// sign with cryptopp and stringsource hash filter
+		string sigstr;
+		StringSource ssrc(asString(m), true, new SignerFilter(pp::PRNG, signer, new StringSink(sigstr)));
+		FixedHash<sizeof(Signature)> retsig((byte const*)sigstr.data(), Signature::ConstructFromPointer);
+		BOOST_REQUIRE(verifier.VerifyMessage(m.data(), m.size(), retsig.data(), 64));
+		BOOST_REQUIRE(crypto::verify(key.pub(), retsig, bytesConstRef(&m)));
+		BOOST_REQUIRE(dev::verify(key.pub(), retsig, hm));
+		
+		/// verification w/sec256lib
+		// requires public key and sig in standard format
+		byte encpub[65] = {0x04};
+		memcpy(&encpub[1], key.pub().data(), 64);
+		byte dersig[72];
+		
+		// verify sec256lib sig w/sec256lib
+		size_t cssz = DSAConvertSignatureFormat(dersig, 72, DSA_DER, seclibsig.data(), 64, DSA_P1363);
+		BOOST_CHECK(cssz <= 72);
+		BOOST_REQUIRE(1 == secp256k1_ecdsa_verify(hm.data(), sizeof(hm), dersig, cssz, encpub, 65));
+		
+		// verify cryptopp-raw sig w/sec256lib
+		cssz = DSAConvertSignatureFormat(dersig, 72, DSA_DER, sigppraw.data(), 64, DSA_P1363);
+		BOOST_CHECK(cssz <= 72);
+		BOOST_REQUIRE(1 == secp256k1_ecdsa_verify(hm.data(), sizeof(hm), dersig, cssz, encpub, 65));
+
+		// verify cryptopp sig w/sec256lib
+		cssz = DSAConvertSignatureFormat(dersig, 72, DSA_DER, sigppb.data(), 64, DSA_P1363);
+		BOOST_CHECK(cssz <= 72);
+		BOOST_REQUIRE(1 == secp256k1_ecdsa_verify(hm.data(), sizeof(hm), dersig, cssz, encpub, 65));
+	}
 }
 
 BOOST_AUTO_TEST_CASE(cryptopp_public_export_import)
 {
-	ECIES<ECP>::Decryptor d(pp::PRNG(), pp::secp256k1());
+	ECIES<ECP>::Decryptor d(pp::PRNG, pp::secp256k1Curve);
 	ECIES<ECP>::Encryptor e(d.GetKey());
 
 	Secret s;
-	pp::SecretFromDL_PrivateKey_EC(d.GetKey(), s);
+	pp::exportPrivateKey(d.GetKey(), s);
 	Public p;
-	pp::PublicFromDL_PublicKey_EC(e.GetKey(), p);
+	pp::exportPublicKey(e.GetKey(), p);
 	Address addr = right160(dev::sha3(p.ref()));
-	assert(toAddress(s) == addr);
+	BOOST_REQUIRE(toAddress(s) == addr);
 	
 	KeyPair l(s);
-	assert(l.address() == addr);
-	
-	DL_PublicKey_EC<ECP> pub;
-	pub.Initialize(pp::secp256k1(), pp::PointFromPublic(p));
-	assert(pub.GetPublicElement() == e.GetKey().GetPublicElement());
-
-	KeyPair k = KeyPair::create();
-	Public p2;
-	pp::PublicFromExponent(pp::ExponentFromSecret(k.sec()), p2);
-	assert(k.pub() == p2);
-	
-	Address a = k.address();
-	Address a2 = toAddress(k.sec());
-	assert(a2 == a);
+	BOOST_REQUIRE(l.address() == addr);
 }
 
 BOOST_AUTO_TEST_CASE(ecies_eckeypair)
@@ -158,10 +272,10 @@ BOOST_AUTO_TEST_CASE(ecies_eckeypair)
 	
 	bytes b = asBytes(message);
 	encrypt(k.pub(), b);
-	assert(b != asBytes(original));
+	BOOST_REQUIRE(b != asBytes(original));
 
 	decrypt(k.sec(), b);
-	assert(b == asBytes(original));
+	BOOST_REQUIRE(b == asBytes(original));
 }
 
 BOOST_AUTO_TEST_CASE(ecdhe_aes128_ctr_sha3mac)
@@ -172,9 +286,6 @@ BOOST_AUTO_TEST_CASE(ecdhe_aes128_ctr_sha3mac)
 	// All connections should share seed for PRF (or PRNG) for nonces
 	
 	
-	
-	
-	
 }
 
 BOOST_AUTO_TEST_CASE(cryptopp_ecies_message)
@@ -183,7 +294,7 @@ BOOST_AUTO_TEST_CASE(cryptopp_ecies_message)
 
 	string const message("Now is the time for all good persons to come to the aide of humanity.");
 
-	ECIES<ECP>::Decryptor localDecryptor(pp::PRNG(), pp::secp256k1());
+	ECIES<ECP>::Decryptor localDecryptor(pp::PRNG, pp::secp256k1Curve);
 	SavePrivateKey(localDecryptor.GetPrivateKey());
 	
 	ECIES<ECP>::Encryptor localEncryptor(localDecryptor);
@@ -191,43 +302,43 @@ BOOST_AUTO_TEST_CASE(cryptopp_ecies_message)
 
 	ECIES<ECP>::Decryptor futureDecryptor;
 	LoadPrivateKey(futureDecryptor.AccessPrivateKey());
-	futureDecryptor.GetPrivateKey().ThrowIfInvalid(pp::PRNG(), 3);
+	futureDecryptor.GetPrivateKey().ThrowIfInvalid(pp::PRNG, 3);
 	
 	ECIES<ECP>::Encryptor futureEncryptor;
 	LoadPublicKey(futureEncryptor.AccessPublicKey());
-	futureEncryptor.GetPublicKey().ThrowIfInvalid(pp::PRNG(), 3);
+	futureEncryptor.GetPublicKey().ThrowIfInvalid(pp::PRNG, 3);
 
 	// encrypt/decrypt with local
 	string cipherLocal;
-	StringSource ss1 (message, true, new PK_EncryptorFilter(pp::PRNG(), localEncryptor, new StringSink(cipherLocal) ) );
+	StringSource ss1 (message, true, new PK_EncryptorFilter(pp::PRNG, localEncryptor, new StringSink(cipherLocal) ) );
 	string plainLocal;
-	StringSource ss2 (cipherLocal, true, new PK_DecryptorFilter(pp::PRNG(), localDecryptor, new StringSink(plainLocal) ) );
+	StringSource ss2 (cipherLocal, true, new PK_DecryptorFilter(pp::PRNG, localDecryptor, new StringSink(plainLocal) ) );
 
 	// encrypt/decrypt with future
 	string cipherFuture;
-	StringSource ss3 (message, true, new PK_EncryptorFilter(pp::PRNG(), futureEncryptor, new StringSink(cipherFuture) ) );
+	StringSource ss3 (message, true, new PK_EncryptorFilter(pp::PRNG, futureEncryptor, new StringSink(cipherFuture) ) );
 	string plainFuture;
-	StringSource ss4 (cipherFuture, true, new PK_DecryptorFilter(pp::PRNG(), futureDecryptor, new StringSink(plainFuture) ) );
+	StringSource ss4 (cipherFuture, true, new PK_DecryptorFilter(pp::PRNG, futureDecryptor, new StringSink(plainFuture) ) );
 	
 	// decrypt local w/future
 	string plainFutureFromLocal;
-	StringSource ss5 (cipherLocal, true, new PK_DecryptorFilter(pp::PRNG(), futureDecryptor, new StringSink(plainFutureFromLocal) ) );
+	StringSource ss5 (cipherLocal, true, new PK_DecryptorFilter(pp::PRNG, futureDecryptor, new StringSink(plainFutureFromLocal) ) );
 	
 	// decrypt future w/local
 	string plainLocalFromFuture;
-	StringSource ss6 (cipherFuture, true, new PK_DecryptorFilter(pp::PRNG(), localDecryptor, new StringSink(plainLocalFromFuture) ) );
+	StringSource ss6 (cipherFuture, true, new PK_DecryptorFilter(pp::PRNG, localDecryptor, new StringSink(plainLocalFromFuture) ) );
 	
 	
-	assert(plainLocal == message);
-	assert(plainFuture == plainLocal);
-	assert(plainFutureFromLocal == plainLocal);
-	assert(plainLocalFromFuture == plainLocal);
+	BOOST_REQUIRE(plainLocal == message);
+	BOOST_REQUIRE(plainFuture == plainLocal);
+	BOOST_REQUIRE(plainFutureFromLocal == plainLocal);
+	BOOST_REQUIRE(plainLocalFromFuture == plainLocal);
 }
 
 BOOST_AUTO_TEST_CASE(cryptopp_aes128_ctr)
 {
 	const int aesKeyLen = 16;
-	assert(sizeof(char) == sizeof(byte));
+	BOOST_REQUIRE(sizeof(char) == sizeof(byte));
 	
 	// generate test key
 	AutoSeededRandomPool rng;
@@ -250,7 +361,7 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_ctr)
 		CTR_Mode<AES>::Encryption e;
 		e.SetKeyWithIV(key, key.size(), ctr);
 		e.ProcessData(out, in, text.size());
-		assert(text != original);
+		BOOST_REQUIRE(text != original);
 		cipherCopy = text;
 	}
 	catch(CryptoPP::Exception& e)
@@ -263,7 +374,7 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_ctr)
 		CTR_Mode< AES >::Decryption d;
 		d.SetKeyWithIV(key, key.size(), ctr);
 		d.ProcessData(out, in, text.size());
-		assert(text == original);
+		BOOST_REQUIRE(text == original);
 	}
 	catch(CryptoPP::Exception& e)
 	{
@@ -274,7 +385,7 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_ctr)
 	// reencrypt ciphertext...
 	try
 	{
-		assert(cipherCopy != text);
+		BOOST_REQUIRE(cipherCopy != text);
 		in = (unsigned char*)&cipherCopy[0];
 		out = (unsigned char*)&cipherCopy[0];
 		
@@ -283,7 +394,7 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_ctr)
 		e.ProcessData(out, in, text.size());
 		
 		// yep, ctr mode.
-		assert(cipherCopy == original);
+		BOOST_REQUIRE(cipherCopy == original);
 	}
 	catch(CryptoPP::Exception& e)
 	{
@@ -295,7 +406,7 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_ctr)
 BOOST_AUTO_TEST_CASE(cryptopp_aes128_cbc)
 {
 	const int aesKeyLen = 16;
-	assert(sizeof(char) == sizeof(byte));
+	BOOST_REQUIRE(sizeof(char) == sizeof(byte));
 	
 	AutoSeededRandomPool rng;
 	SecByteBlock key(0x00, aesKeyLen);
@@ -310,11 +421,11 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_cbc)
 	
 	CryptoPP::CBC_Mode<Rijndael>::Encryption cbcEncryption(key, key.size(), iv);
 	cbcEncryption.ProcessData((byte*)&string128[0], (byte*)&string128[0], string128.size());
-	assert(string128 != plainOriginal);
+	BOOST_REQUIRE(string128 != plainOriginal);
 	
 	CBC_Mode<Rijndael>::Decryption cbcDecryption(key, key.size(), iv);
 	cbcDecryption.ProcessData((byte*)&string128[0], (byte*)&string128[0], string128.size());
-	assert(plainOriginal == string128);
+	BOOST_REQUIRE(plainOriginal == string128);
 	
 	
 	// plaintext whose size isn't divisible by block size must use stream filter for padding
@@ -324,10 +435,10 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_cbc)
 	string cipher;
 	StreamTransformationFilter* aesStream = new StreamTransformationFilter(cbcEncryption, new StringSink(cipher));
 	StringSource source(string192, true, aesStream);
-	assert(cipher.size() == 32);
+	BOOST_REQUIRE(cipher.size() == 32);
 
 	cbcDecryption.ProcessData((byte*)&cipher[0], (byte*)&string192[0], cipher.size());
-	assert(string192 == plainOriginal);
+	BOOST_REQUIRE(string192 == plainOriginal);
 }
 
 BOOST_AUTO_TEST_CASE(eth_keypairs)
@@ -339,20 +450,15 @@ BOOST_AUTO_TEST_CASE(eth_keypairs)
 	BOOST_REQUIRE(p.pub() == Public(fromHex("97466f2b32bc3bb76d4741ae51cd1d8578b48d3f1e68da206d47321aec267ce78549b514e4453d74ef11b0cd5e4e4c364effddac8b51bcfc8de80682f952896f")));
 	BOOST_REQUIRE(p.address() == Address(fromHex("8a40bfaa73256b60764c1bf40675a99083efb075")));
 	{
-		eth::Transaction t;
-		t.nonce = 0;
-		t.type = eth::Transaction::MessageCall;
-		t.receiveAddress = h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b"));
-		t.value = 1000;
-		auto rlp = t.rlp(false);
+		eth::Transaction t(1000, 0, 0, h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b")), bytes(), 0, p.secret());
+		auto rlp = t.rlp(eth::WithoutSignature);
 		cnote << RLP(rlp);
 		cnote << toHex(rlp);
-		cnote << t.sha3(false);
-		t.sign(p.secret());
-		rlp = t.rlp(true);
+		cnote << t.sha3(eth::WithoutSignature);
+		rlp = t.rlp(eth::WithSignature);
 		cnote << RLP(rlp);
 		cnote << toHex(rlp);
-		cnote << t.sha3(true);
+		cnote << t.sha3(eth::WithSignature);
 		BOOST_REQUIRE(t.sender() == p.address());
 	}
 
@@ -365,23 +471,18 @@ int cryptoTest()
 	secp256k1_start();
 
 	KeyPair p(Secret(fromHex("3ecb44df2159c26e0f995712d4f39b6f6e499b40749b1cf1246c37f9516cb6a4")));
-	assert(p.pub() == Public(fromHex("97466f2b32bc3bb76d4741ae51cd1d8578b48d3f1e68da206d47321aec267ce78549b514e4453d74ef11b0cd5e4e4c364effddac8b51bcfc8de80682f952896f")));
-	assert(p.address() == Address(fromHex("8a40bfaa73256b60764c1bf40675a99083efb075")));
+	BOOST_REQUIRE(p.pub() == Public(fromHex("97466f2b32bc3bb76d4741ae51cd1d8578b48d3f1e68da206d47321aec267ce78549b514e4453d74ef11b0cd5e4e4c364effddac8b51bcfc8de80682f952896f")));
+	BOOST_REQUIRE(p.address() == Address(fromHex("8a40bfaa73256b60764c1bf40675a99083efb075")));
 	{
-		eth::Transaction t;
-		t.nonce = 0;
-		t.type = eth::Transaction::MessageCall;
-		t.receiveAddress = h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b"));
-		t.value = 1000;
-		auto rlp = t.rlp(false);
+		eth::Transaction t(1000, 0, 0, h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b")), bytes(), 0, p.secret());
+		auto rlp = t.rlp(eth::WithoutSignature);
 		cnote << RLP(rlp);
 		cnote << toHex(rlp);
-		cnote << t.sha3(false);
-		t.sign(p.secret());
-		rlp = t.rlp(true);
+		cnote << t.sha3(eth::WithoutSignature);
+		rlp = t.rlp(eth::WithSignature);
 		cnote << RLP(rlp);
 		cnote << toHex(rlp);
-		cnote << t.sha3(true);
+		cnote << t.sha3(eth::WithSignature);
 		assert(t.sender() == p.address());
 	}
 
@@ -407,8 +508,8 @@ int cryptoTest()
 
 	auto msg = t.rlp(false);
 	cout << "TX w/o SIG: " << RLP(msg) << endl;
-	cout << "RLP(TX w/o SIG): " << toHex(t.rlpString(false)) << endl;
-	std::string hmsg = sha3(t.rlpString(false), false);
+	cout << "RLP(TX w/o SIG): " << toHex(t.rlp(false)) << endl;
+	std::string hmsg = sha3(t.rlp(false), false);
 	cout << "SHA256(RLP(TX w/o SIG)): 0x" << toHex(hmsg) << endl;
 
 	bytes privkey = sha3Bytes("123");
diff --git a/solidityCompiler.cpp b/solidityCompiler.cpp
index e024043e..192fd61a 100644
--- a/solidityCompiler.cpp
+++ b/solidityCompiler.cpp
@@ -1,4 +1,3 @@
-
 /*
 	This file is part of cpp-ethereum.
 
@@ -18,18 +17,21 @@
 /**
  * @author Christian <c@ethdev.com>
  * @date 2014
- * Unit tests for the name and type resolution of the solidity parser.
+ * Unit tests for the solidity compiler.
  */
 
 #include <string>
-
+#include <iostream>
+#include <boost/test/unit_test.hpp>
 #include <libdevcore/Log.h>
 #include <libsolidity/Scanner.h>
 #include <libsolidity/Parser.h>
 #include <libsolidity/NameAndTypeResolver.h>
 #include <libsolidity/Compiler.h>
 #include <libsolidity/AST.h>
-#include <boost/test/unit_test.hpp>
+
+using namespace std;
+using namespace dev::eth;
 
 namespace dev
 {
@@ -41,186 +43,187 @@ namespace test
 namespace
 {
 
-/**
- * Helper class that extracts the first expression in an AST.
- */
-class FirstExpressionExtractor: private ASTVisitor
-{
-public:
-	FirstExpressionExtractor(ASTNode& _node): m_expression(nullptr) { _node.accept(*this); }
-	Expression* getExpression() const { return m_expression; }
-private:
-	virtual bool visit(Expression& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(Assignment& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(UnaryOperation& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(BinaryOperation& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(FunctionCall& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(MemberAccess& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(IndexAccess& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(PrimaryExpression& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(Identifier& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(ElementaryTypeNameExpression& _expression) override { return checkExpression(_expression); }
-	virtual bool visit(Literal& _expression) override { return checkExpression(_expression); }
-	bool checkExpression(Expression& _expression)
-	{
-		if (m_expression == nullptr)
-			m_expression = &_expression;
-		return false;
-	}
-private:
-	Expression* m_expression;
-};
-
-bytes compileFirstExpression(std::string const& _sourceCode)
+bytes compileContract(const string& _sourceCode)
 {
 	Parser parser;
 	ASTPointer<ContractDefinition> contract;
-	BOOST_REQUIRE_NO_THROW(contract = parser.parse(std::make_shared<Scanner>(CharStream(_sourceCode))));
+	BOOST_REQUIRE_NO_THROW(contract = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
 	NameAndTypeResolver resolver;
 	BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
-	FirstExpressionExtractor extractor(*contract);
-	BOOST_REQUIRE(extractor.getExpression() != nullptr);
 
-	CompilerContext context;
-	ExpressionCompiler compiler(context);
-	compiler.compile(*extractor.getExpression());
-	bytes instructions = compiler.getAssembledBytecode();
+	Compiler compiler;
+	compiler.compileContract(*contract);
 	// debug
-	//std::cout << eth::disassemble(instructions) << std::endl;
-	return instructions;
+	//compiler.streamAssembly(cout);
+	return compiler.getAssembledBytecode();
 }
 
-} // end anonymous namespace
-
-BOOST_AUTO_TEST_SUITE(SolidityExpressionCompiler)
-
-BOOST_AUTO_TEST_CASE(literal_true)
+/// Checks that @a _compiledCode is present starting from offset @a _offset in @a _expectation.
+/// This is necessary since the compiler will add boilerplate add the beginning that is not
+/// tested here.
+void checkCodePresentAt(bytes const& _compiledCode, bytes const& _expectation, unsigned _offset)
 {
-	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = true; }"
-							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({byte(eth::Instruction::PUSH1), 0x1});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
-}
-
-BOOST_AUTO_TEST_CASE(literal_false)
-{
-	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = false; }"
-							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({byte(eth::Instruction::PUSH1), 0x0});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+	BOOST_REQUIRE(_compiledCode.size() >= _offset + _expectation.size());
+	auto checkStart = _compiledCode.begin() + _offset;
+	BOOST_CHECK_EQUAL_COLLECTIONS(checkStart, checkStart + _expectation.size(),
+								  _expectation.begin(), _expectation.end());
 }
 
-BOOST_AUTO_TEST_CASE(int_literal)
-{
-	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = 0x12345678901234567890; }"
-							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
+} // end anonymous namespace
 
-	bytes expectation({byte(eth::Instruction::PUSH10), 0x12, 0x34, 0x56, 0x78, 0x90,
-													   0x12, 0x34, 0x56, 0x78, 0x90});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
-}
+BOOST_AUTO_TEST_SUITE(SolidityCompiler)
 
-BOOST_AUTO_TEST_CASE(comparison)
+BOOST_AUTO_TEST_CASE(smoke_test)
 {
 	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = (0x10aa < 0x11aa) != true; }"
+							 "  function f() { var x = 2; }\n"
 							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({byte(eth::Instruction::PUSH2), 0x10, 0xaa,
-					   byte(eth::Instruction::PUSH2), 0x11, 0xaa,
-					   byte(eth::Instruction::GT),
-					   byte(eth::Instruction::PUSH1), 0x1,
-					   byte(eth::Instruction::EQ),
-					   byte(eth::Instruction::NOT)});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+	bytes code = compileContract(sourceCode);
+
+	unsigned boilerplateSize = 51;
+	bytes expectation({byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), 0x0, // initialize local variable x
+					   byte(Instruction::PUSH1), 0x2,
+					   byte(Instruction::SWAP1),
+					   byte(Instruction::POP),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::POP),
+					   byte(Instruction::JUMP)});
+	checkCodePresentAt(code, expectation, boilerplateSize);
 }
 
-BOOST_AUTO_TEST_CASE(short_circuiting)
+BOOST_AUTO_TEST_CASE(different_argument_numbers)
 {
 	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = (10 + 8 >= 4 || 2 != 9) != true; }"
+							 "  function f(uint a, uint b, uint c) returns(uint d) { return b; }\n"
+							 "  function g() returns (uint e, uint h) { h = f(1, 2, 3); }\n"
 							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({byte(eth::Instruction::PUSH1), 0xa,
-					   byte(eth::Instruction::PUSH1), 0x8,
-					   byte(eth::Instruction::ADD),
-					   byte(eth::Instruction::PUSH1), 0x4,
-					   byte(eth::Instruction::GT),
-					   byte(eth::Instruction::NOT), // after this we have 10 + 8 >= 4
-					   byte(eth::Instruction::DUP1),
-					   byte(eth::Instruction::PUSH1), 0x14,
-					   byte(eth::Instruction::JUMPI), // short-circuit if it is true
-					   byte(eth::Instruction::PUSH1), 0x2,
-					   byte(eth::Instruction::PUSH1), 0x9,
-					   byte(eth::Instruction::EQ),
-					   byte(eth::Instruction::NOT), // after this we have 2 != 9
-					   byte(eth::Instruction::JUMPDEST),
-					   byte(eth::Instruction::PUSH1), 0x1,
-					   byte(eth::Instruction::EQ),
-					   byte(eth::Instruction::NOT)});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+	bytes code = compileContract(sourceCode);
+
+	unsigned shift = 75;
+	unsigned boilerplateSize = 88;
+	bytes expectation({byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), 0x0, // initialize return variable d
+					   byte(Instruction::DUP3),
+					   byte(Instruction::SWAP1), // assign b to d
+					   byte(Instruction::POP),
+					   byte(Instruction::PUSH1), byte(0xa + shift), // jump to return
+					   byte(Instruction::JUMP),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::SWAP4), // store d and fetch return address
+					   byte(Instruction::SWAP3), // store return address
+					   byte(Instruction::POP),
+					   byte(Instruction::POP),
+					   byte(Instruction::POP),
+					   byte(Instruction::JUMP), // end of f
+					   byte(Instruction::JUMPDEST), // beginning of g
+					   byte(Instruction::PUSH1), 0x0,
+					   byte(Instruction::DUP1), // initialized e and h
+					   byte(Instruction::PUSH1), 0x29 + shift, // ret address
+					   byte(Instruction::PUSH1), 0x1, byte(Instruction::PUSH1), 0xff, byte(Instruction::AND),
+					   byte(Instruction::PUSH1), 0x2, byte(Instruction::PUSH1), 0xff, byte(Instruction::AND),
+					   byte(Instruction::PUSH1), 0x3, byte(Instruction::PUSH1), 0xff, byte(Instruction::AND),
+					   byte(Instruction::PUSH1), byte(0x1 + shift),
+					   // stack here: ret e h 0x20 1 2 3 0x1
+					   byte(Instruction::JUMP),
+					   byte(Instruction::JUMPDEST),
+					   // stack here: ret e h f(1,2,3)
+					   byte(Instruction::DUP2),
+					   byte(Instruction::POP),
+					   byte(Instruction::SWAP1),
+					   // stack here: ret e f(1,2,3) h
+					   byte(Instruction::POP),
+					   byte(Instruction::DUP1), // retrieve it again as "value of expression"
+					   byte(Instruction::POP), // end of assignment
+					   // stack here: ret e f(1,2,3)
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::SWAP1),
+					   // ret e f(1,2,3)
+					   byte(Instruction::SWAP2),
+					   // f(1,2,3) e ret
+					   byte(Instruction::JUMP) // end of g
+					   });
+	checkCodePresentAt(code, expectation, boilerplateSize);
 }
 
-BOOST_AUTO_TEST_CASE(arithmetics)
+BOOST_AUTO_TEST_CASE(ifStatement)
 {
 	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = (1 * (2 / (3 % (4 + (5 - (6 | (7 & (8 ^ 9)))))))); }"
+							 "  function f() { bool x; if (x) 77; else if (!x) 78; else 79; }"
 							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({byte(eth::Instruction::PUSH1), 0x1,
-					   byte(eth::Instruction::PUSH1), 0x2,
-					   byte(eth::Instruction::PUSH1), 0x3,
-					   byte(eth::Instruction::PUSH1), 0x4,
-					   byte(eth::Instruction::PUSH1), 0x5,
-					   byte(eth::Instruction::PUSH1), 0x6,
-					   byte(eth::Instruction::PUSH1), 0x7,
-					   byte(eth::Instruction::PUSH1), 0x8,
-					   byte(eth::Instruction::PUSH1), 0x9,
-					   byte(eth::Instruction::XOR),
-					   byte(eth::Instruction::AND),
-					   byte(eth::Instruction::OR),
-					   byte(eth::Instruction::SWAP1),
-					   byte(eth::Instruction::SUB),
-					   byte(eth::Instruction::ADD),
-					   byte(eth::Instruction::SWAP1),
-					   byte(eth::Instruction::MOD),
-					   byte(eth::Instruction::SWAP1),
-					   byte(eth::Instruction::DIV),
-					   byte(eth::Instruction::MUL)});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+	bytes code = compileContract(sourceCode);
+
+	unsigned shift = 38;
+	unsigned boilerplateSize = 51;
+	bytes expectation({byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), 0x0,
+					   byte(Instruction::DUP1),
+					   byte(Instruction::PUSH1), byte(0x1b + shift), // "true" target
+					   byte(Instruction::JUMPI),
+					   // new check "else if" condition
+					   byte(Instruction::DUP1),
+					   byte(Instruction::ISZERO),
+					   byte(Instruction::PUSH1), byte(0x13 + shift),
+					   byte(Instruction::JUMPI),
+					   // "else" body
+					   byte(Instruction::PUSH1), 0x4f,
+					   byte(Instruction::POP),
+					   byte(Instruction::PUSH1), byte(0x17 + shift), // exit path of second part
+					   byte(Instruction::JUMP),
+					   // "else if" body
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), 0x4e,
+					   byte(Instruction::POP),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), byte(0x1f + shift),
+					   byte(Instruction::JUMP),
+					   // "if" body
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), 0x4d,
+					   byte(Instruction::POP),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::POP),
+					   byte(Instruction::JUMP)});
+	checkCodePresentAt(code, expectation, boilerplateSize);
 }
 
-BOOST_AUTO_TEST_CASE(unary_operators)
+BOOST_AUTO_TEST_CASE(loops)
 {
 	char const* sourceCode = "contract test {\n"
-							 "  function f() { var x = !(~+-(--(++1++)--) == 2); }"
+							 "  function f() { while(true){1;break;2;continue;3;return;4;} }"
 							 "}\n";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({byte(eth::Instruction::PUSH1), 0x1,
-					   byte(eth::Instruction::PUSH1), 0x1,
-					   byte(eth::Instruction::ADD),
-					   byte(eth::Instruction::PUSH1), 0x1,
-					   byte(eth::Instruction::SWAP1),
-					   byte(eth::Instruction::SUB),
-					   byte(eth::Instruction::PUSH1), 0x0,
-					   byte(eth::Instruction::SUB),
-					   byte(eth::Instruction::NOT),
-					   byte(eth::Instruction::PUSH1), 0x2,
-					   byte(eth::Instruction::EQ),
-					   byte(eth::Instruction::ISZERO)});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+	bytes code = compileContract(sourceCode);
+
+	unsigned shift = 38;
+	unsigned boilerplateSize = 51;
+	bytes expectation({byte(Instruction::JUMPDEST),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::PUSH1), 0x1,
+					   byte(Instruction::ISZERO),
+					   byte(Instruction::PUSH1), byte(0x21 + shift),
+					   byte(Instruction::JUMPI),
+					   byte(Instruction::PUSH1), 0x1,
+					   byte(Instruction::POP),
+					   byte(Instruction::PUSH1), byte(0x21 + shift),
+					   byte(Instruction::JUMP), // break
+					   byte(Instruction::PUSH1), 0x2,
+					   byte(Instruction::POP),
+					   byte(Instruction::PUSH1), byte(0x2 + shift),
+					   byte(Instruction::JUMP), // continue
+					   byte(Instruction::PUSH1), 0x3,
+					   byte(Instruction::POP),
+					   byte(Instruction::PUSH1), byte(0x22 + shift),
+					   byte(Instruction::JUMP), // return
+					   byte(Instruction::PUSH1), 0x4,
+					   byte(Instruction::POP),
+					   byte(Instruction::PUSH1), byte(0x2 + shift),
+					   byte(Instruction::JUMP),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::JUMPDEST),
+					   byte(Instruction::JUMP)});
+
+	checkCodePresentAt(code, expectation, boilerplateSize);
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/solidityEndToEndTest.cpp b/solidityEndToEndTest.cpp
new file mode 100644
index 00000000..35c2a3b0
--- /dev/null
+++ b/solidityEndToEndTest.cpp
@@ -0,0 +1,331 @@
+
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2014
+ * Unit tests for the solidity expression compiler, testing the behaviour of the code.
+ */
+
+#include <string>
+#include <boost/test/unit_test.hpp>
+#include <libethereum/State.h>
+#include <libethereum/Executive.h>
+#include <libsolidity/CompilerStack.h>
+
+using namespace std;
+
+namespace dev
+{
+namespace solidity
+{
+namespace test
+{
+
+class ExecutionFramework
+{
+public:
+	ExecutionFramework() { g_logVerbosity = 0; }
+
+	bytes const& compileAndRun(std::string const& _sourceCode)
+	{
+		bytes code = dev::solidity::CompilerStack::compile(_sourceCode);
+		sendMessage(code, true);
+		BOOST_REQUIRE(!m_output.empty());
+		return m_output;
+	}
+
+	bytes const& callFunction(byte _index, bytes const& _data)
+	{
+		sendMessage(bytes(1, _index) + _data, false);
+		return m_output;
+	}
+
+	bytes const& callFunction(byte _index, u256 const& _argument1)
+	{
+		return callFunction(_index, toBigEndian(_argument1));
+	}
+
+private:
+	void sendMessage(bytes const& _data, bool _isCreation)
+	{
+		eth::Executive executive(m_state);
+		eth::Transaction t = _isCreation ? eth::Transaction(0, m_gasPrice, m_gas, _data, 0, KeyPair::create().sec())
+										 : eth::Transaction(0, m_gasPrice, m_gas, m_contractAddress, _data, 0, KeyPair::create().sec());
+		bytes transactionRLP = t.rlp();
+		try
+		{
+			// this will throw since the transaction is invalid, but it should nevertheless store the transaction
+			executive.setup(&transactionRLP);
+		}
+		catch (...) {}
+		if (_isCreation)
+		{
+			BOOST_REQUIRE(!executive.create(Address(), 0, m_gasPrice, m_gas, &_data, Address()));
+			m_contractAddress = executive.newAddress();
+			BOOST_REQUIRE(m_contractAddress);
+			BOOST_REQUIRE(m_state.addressHasCode(m_contractAddress));
+		}
+		else
+			BOOST_REQUIRE(!executive.call(m_contractAddress, Address(), 0, m_gasPrice, &_data, m_gas, Address()));
+		BOOST_REQUIRE(executive.go());
+		executive.finalize();
+		m_output = executive.out().toVector();
+	}
+
+	Address m_contractAddress;
+	eth::State m_state;
+	u256 const m_gasPrice = 100 * eth::szabo;
+	u256 const m_gas = 1000000;
+	bytes m_output;
+};
+
+BOOST_FIXTURE_TEST_SUITE(SolidityCompilerEndToEndTest, ExecutionFramework)
+
+BOOST_AUTO_TEST_CASE(smoke_test)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint a) returns(uint d) { return a * 7; }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	u256 a = 0x200030004;
+	BOOST_CHECK(callFunction(0, a) == toBigEndian(a * 7));
+}
+
+BOOST_AUTO_TEST_CASE(empty_contract)
+{
+	char const* sourceCode = "contract test {\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, bytes()).empty());
+}
+
+BOOST_AUTO_TEST_CASE(recursive_calls)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint n) returns(uint nfac) {\n"
+							 "    if (n <= 1) return 1;\n"
+							 "    else return n * f(n - 1);\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, u256(0)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(0, u256(1)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(0, u256(2)) == toBigEndian(u256(2)));
+	BOOST_CHECK(callFunction(0, u256(3)) == toBigEndian(u256(6)));
+	BOOST_CHECK(callFunction(0, u256(4)) == toBigEndian(u256(24)));
+}
+
+BOOST_AUTO_TEST_CASE(while_loop)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint n) returns(uint nfac) {\n"
+							 "    nfac = 1;\n"
+							 "    var i = 2;\n"
+							 "    while (i <= n) nfac *= i++;\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, u256(0)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(0, u256(1)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(0, u256(2)) == toBigEndian(u256(2)));
+	BOOST_CHECK(callFunction(0, u256(3)) == toBigEndian(u256(6)));
+	BOOST_CHECK(callFunction(0, u256(4)) == toBigEndian(u256(24)));
+}
+
+BOOST_AUTO_TEST_CASE(break_outside_loop)
+{
+	// break and continue outside loops should be simply ignored
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint x) returns(uint y) {\n"
+							 "    break; continue; return 2;\n"
+							 "  }\n"
+							 "}\n";
+	ExecutionFramework framework;
+	framework.compileAndRun(sourceCode);
+	BOOST_CHECK(framework.callFunction(0, u256(0)) == toBigEndian(u256(2)));
+}
+
+BOOST_AUTO_TEST_CASE(nested_loops)
+{
+	// tests that break and continue statements in nested loops jump to the correct place
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint x) returns(uint y) {\n"
+							 "    while (x > 1) {\n"
+							 "      if (x == 10) break;\n"
+							 "      while (x > 5) {\n"
+							 "        if (x == 8) break;\n"
+							 "        x--;\n"
+							 "        if (x == 6) continue;\n"
+							 "        return x;\n"
+							 "      }\n"
+							 "      x--;\n"
+							 "      if (x == 3) continue;\n"
+							 "      break;\n"
+							 "    }\n"
+							 "    return x;\n"
+							 "  }\n"
+							 "}\n";
+	ExecutionFramework framework;
+	framework.compileAndRun(sourceCode);
+	BOOST_CHECK(framework.callFunction(0, u256(0)) == toBigEndian(u256(0)));
+	BOOST_CHECK(framework.callFunction(0, u256(1)) == toBigEndian(u256(1)));
+	BOOST_CHECK(framework.callFunction(0, u256(2)) == toBigEndian(u256(1)));
+	BOOST_CHECK(framework.callFunction(0, u256(3)) == toBigEndian(u256(2)));
+	BOOST_CHECK(framework.callFunction(0, u256(4)) == toBigEndian(u256(2)));
+	BOOST_CHECK(framework.callFunction(0, u256(5)) == toBigEndian(u256(4)));
+	BOOST_CHECK(framework.callFunction(0, u256(6)) == toBigEndian(u256(5)));
+	BOOST_CHECK(framework.callFunction(0, u256(7)) == toBigEndian(u256(5)));
+	BOOST_CHECK(framework.callFunction(0, u256(8)) == toBigEndian(u256(7)));
+	BOOST_CHECK(framework.callFunction(0, u256(9)) == toBigEndian(u256(8)));
+	BOOST_CHECK(framework.callFunction(0, u256(10)) == toBigEndian(u256(10)));
+	BOOST_CHECK(framework.callFunction(0, u256(11)) == toBigEndian(u256(10)));
+}
+
+BOOST_AUTO_TEST_CASE(calling_other_functions)
+{
+	// note that the index of a function is its index in the sorted sequence of functions
+	char const* sourceCode = "contract collatz {\n"
+							 "  function run(uint x) returns(uint y) {\n"
+							 "    while ((y = x) > 1) {\n"
+							 "      if (x % 2 == 0) x = evenStep(x);\n"
+							 "      else x = oddStep(x);\n"
+							 "    }\n"
+							 "  }\n"
+							 "  function evenStep(uint x) returns(uint y) {\n"
+							 "    return x / 2;\n"
+							 "  }\n"
+							 "  function oddStep(uint x) returns(uint y) {\n"
+							 "    return 3 * x + 1;\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(2, u256(0)) == toBigEndian(u256(0)));
+	BOOST_CHECK(callFunction(2, u256(1)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(2, u256(2)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(2, u256(8)) == toBigEndian(u256(1)));
+	BOOST_CHECK(callFunction(2, u256(127)) == toBigEndian(u256(1)));
+}
+
+BOOST_AUTO_TEST_CASE(many_local_variables)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run(uint x1, uint x2, uint x3) returns(uint y) {\n"
+							 "    var a = 0x1; var b = 0x10; var c = 0x100;\n"
+							 "    y = a + b + c + x1 + x2 + x3;\n"
+							 "    y += b + x2;\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, toBigEndian(u256(0x1000)) + toBigEndian(u256(0x10000)) + toBigEndian(u256(0x100000)))
+				== toBigEndian(u256(0x121121)));
+}
+
+BOOST_AUTO_TEST_CASE(packing_unpacking_types)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run(bool a, uint32 b, uint64 c) returns(uint256 y) {\n"
+							 "    if (a) y = 1;\n"
+							 "    y = y * 0x100000000 | ~b;\n"
+							 "    y = y * 0x10000000000000000 | ~c;\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, fromHex("01""0f0f0f0f""f0f0f0f0f0f0f0f0"))
+				== fromHex("00000000000000000000000000000000000000""01""f0f0f0f0""0f0f0f0f0f0f0f0f"));
+}
+
+BOOST_AUTO_TEST_CASE(multiple_return_values)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run(bool x1, uint x2) returns(uint y1, bool y2, uint y3) {\n"
+							 "    y1 = x2; y2 = x1;\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, bytes(1, 1) + toBigEndian(u256(0xcd)))
+				== toBigEndian(u256(0xcd)) + bytes(1, 1) + toBigEndian(u256(0)));
+}
+
+BOOST_AUTO_TEST_CASE(short_circuiting)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run(uint x) returns(uint y) {\n"
+							 "    x == 0 || ((x = 8) > 0);\n"
+							 "    return x;"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, u256(0)) == toBigEndian(u256(0)));
+	BOOST_CHECK(callFunction(0, u256(1)) == toBigEndian(u256(8)));
+}
+
+BOOST_AUTO_TEST_CASE(high_bits_cleaning)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run() returns(uint256 y) {\n"
+							 "    uint32 x = uint32(0xffffffff) + 10;\n"
+							 "    if (x >= 0xffffffff) return 0;\n"
+							 "    return x;"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, bytes()) == toBigEndian(u256(9)));
+}
+
+BOOST_AUTO_TEST_CASE(sign_extension)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run() returns(uint256 y) {\n"
+							 "    int64 x = -int32(0xff);\n"
+							 "    if (x >= 0xff) return 0;\n"
+							 "    return -uint256(x);"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, bytes()) == toBigEndian(u256(0xff)));
+}
+
+BOOST_AUTO_TEST_CASE(small_unsigned_types)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run() returns(uint256 y) {\n"
+							 "    uint32 x = uint32(0xffffff) * 0xffffff;\n"
+							 "    return x / 0x100;"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, bytes()) == toBigEndian(u256(0xfe0000)));
+}
+
+BOOST_AUTO_TEST_CASE(small_signed_types)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function run() returns(int256 y) {\n"
+							 "    return -int32(10) * -int64(20);\n"
+							 "  }\n"
+							 "}\n";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callFunction(0, bytes()) == toBigEndian(u256(200)));
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+}
+}
+} // end namespaces
+
diff --git a/solidityExpressionCompiler.cpp b/solidityExpressionCompiler.cpp
new file mode 100644
index 00000000..8fc4a1a2
--- /dev/null
+++ b/solidityExpressionCompiler.cpp
@@ -0,0 +1,394 @@
+
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2014
+ * Unit tests for the solidity expression compiler.
+ */
+
+#include <string>
+
+#include <libdevcore/Log.h>
+#include <libsolidity/Scanner.h>
+#include <libsolidity/Parser.h>
+#include <libsolidity/NameAndTypeResolver.h>
+#include <libsolidity/CompilerContext.h>
+#include <libsolidity/ExpressionCompiler.h>
+#include <libsolidity/AST.h>
+#include <boost/test/unit_test.hpp>
+
+using namespace std;
+
+namespace dev
+{
+namespace solidity
+{
+namespace test
+{
+
+namespace
+{
+
+/// Helper class that extracts the first expression in an AST.
+class FirstExpressionExtractor: private ASTVisitor
+{
+public:
+	FirstExpressionExtractor(ASTNode& _node): m_expression(nullptr) { _node.accept(*this); }
+	Expression* getExpression() const { return m_expression; }
+private:
+	virtual bool visit(Expression& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(Assignment& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(UnaryOperation& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(BinaryOperation& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(FunctionCall& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(MemberAccess& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(IndexAccess& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(PrimaryExpression& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(Identifier& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(ElementaryTypeNameExpression& _expression) override { return checkExpression(_expression); }
+	virtual bool visit(Literal& _expression) override { return checkExpression(_expression); }
+	bool checkExpression(Expression& _expression)
+	{
+		if (m_expression == nullptr)
+			m_expression = &_expression;
+		return false;
+	}
+private:
+	Expression* m_expression;
+};
+
+Declaration const& resolveDeclaration(vector<string> const& _namespacedName,
+											  NameAndTypeResolver const& _resolver)
+{
+	Declaration const* declaration = nullptr;
+	for (string const& namePart: _namespacedName)
+		BOOST_REQUIRE(declaration = _resolver.resolveName(namePart, declaration));
+	BOOST_REQUIRE(declaration);
+	return *declaration;
+}
+
+bytes compileFirstExpression(const string& _sourceCode, vector<vector<string>> _functions = {},
+							 vector<vector<string>> _localVariables = {})
+{
+	Parser parser;
+	ASTPointer<ContractDefinition> contract;
+	BOOST_REQUIRE_NO_THROW(contract = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
+	NameAndTypeResolver resolver;
+	BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
+	FirstExpressionExtractor extractor(*contract);
+	BOOST_REQUIRE(extractor.getExpression() != nullptr);
+
+	CompilerContext context;
+	for (vector<string> const& function: _functions)
+		context.addFunction(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
+	for (vector<string> const& variable: _localVariables)
+		context.addVariable(dynamic_cast<VariableDeclaration const&>(resolveDeclaration(variable, resolver)));
+
+	ExpressionCompiler::compileExpression(context, *extractor.getExpression());
+
+	for (vector<string> const& function: _functions)
+		context << context.getFunctionEntryLabel(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
+	bytes instructions = context.getAssembledBytecode();
+	// debug
+	// cout << eth::disassemble(instructions) << endl;
+	return instructions;
+}
+
+} // end anonymous namespace
+
+BOOST_AUTO_TEST_SUITE(SolidityExpressionCompiler)
+
+BOOST_AUTO_TEST_CASE(literal_true)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = true; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation({byte(eth::Instruction::PUSH1), 0x1});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(literal_false)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = false; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation({byte(eth::Instruction::PUSH1), 0x0});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(int_literal)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = 0x12345678901234567890; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation({byte(eth::Instruction::PUSH10), 0x12, 0x34, 0x56, 0x78, 0x90,
+													   0x12, 0x34, 0x56, 0x78, 0x90});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(comparison)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = (0x10aa < 0x11aa) != true; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation({byte(eth::Instruction::PUSH2), 0x10, 0xaa, byte(eth::Instruction::PUSH2), 0xff, 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::PUSH2), 0x11, 0xaa, byte(eth::Instruction::PUSH2), 0xff, 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::GT),
+					   byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::EQ),
+					   byte(eth::Instruction::ISZERO)});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(short_circuiting)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = (10 + 8 >= 4 || 2 != 9) != true; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation({byte(eth::Instruction::PUSH1), 0xa,
+					   byte(eth::Instruction::PUSH1), 0x8,
+					   byte(eth::Instruction::ADD), byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::PUSH1), 0x4, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::GT),
+					   byte(eth::Instruction::ISZERO), // after this we have 10 + 8 >= 4
+					   byte(eth::Instruction::DUP1),
+					   byte(eth::Instruction::PUSH1), 0x20,
+					   byte(eth::Instruction::JUMPI), // short-circuit if it is true
+					   byte(eth::Instruction::POP),
+					   byte(eth::Instruction::PUSH1), 0x2, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::PUSH1), 0x9, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::EQ),
+					   byte(eth::Instruction::ISZERO), // after this we have 2 != 9
+					   byte(eth::Instruction::JUMPDEST),
+					   byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::EQ),
+					   byte(eth::Instruction::ISZERO)});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(arithmetics)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = (1 * (2 / (3 % (4 + (5 - (6 | (7 & (8 ^ 9)))))))); }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+	bytes expectation({byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::PUSH1), 0x2,
+					   byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::PUSH1), 0x3,
+					   byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::PUSH1), 0x4,
+					   byte(eth::Instruction::PUSH1), 0x5,
+					   byte(eth::Instruction::PUSH1), 0x6,
+					   byte(eth::Instruction::PUSH1), 0x7,
+					   byte(eth::Instruction::PUSH1), 0x8,
+					   byte(eth::Instruction::PUSH1), 0x9,
+					   byte(eth::Instruction::XOR),
+					   byte(eth::Instruction::AND),
+					   byte(eth::Instruction::OR),
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::SUB),
+					   byte(eth::Instruction::ADD),
+					   byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::MOD),
+					   byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::DIV),
+					   byte(eth::Instruction::MUL)});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(unary_operators)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { var x = !(~+- 1 == 2); }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation({byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::PUSH1), 0x0,
+					   byte(eth::Instruction::SUB),
+					   byte(eth::Instruction::NOT), byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::PUSH1), 0x2, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::EQ),
+					   byte(eth::Instruction::ISZERO)});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(unary_inc_dec)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint a) { var x = ((a++ ^ ++a) ^ a--) ^ --a; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode, {}, {{"test", "f", "a"}, {"test", "f", "x"}});
+
+	// Stack: a, x
+	bytes expectation({byte(eth::Instruction::DUP2),
+					   byte(eth::Instruction::DUP1),
+					   byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::ADD),
+					   // Stack here: a x a (a+1)
+					   byte(eth::Instruction::SWAP3),
+					   byte(eth::Instruction::POP), // first ++
+					   // Stack here: (a+1) x a
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::ADD),
+					   // Stack here: (a+1) x a (a+2)
+					   byte(eth::Instruction::SWAP3),
+					   byte(eth::Instruction::POP),
+					   // Stack here: (a+2) x a
+					   byte(eth::Instruction::DUP3), // second ++
+					   byte(eth::Instruction::XOR),
+					   // Stack here: (a+2) x a^(a+2)
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::DUP1),
+					   byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::SUB),
+					   // Stack here: (a+2) x a^(a+2) (a+2) (a+1)
+					   byte(eth::Instruction::SWAP4),
+					   byte(eth::Instruction::POP), // first --
+					   byte(eth::Instruction::XOR),
+					   // Stack here: (a+1) x a^(a+2)^(a+2)
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::PUSH1), 0x1,
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::SUB),
+					   // Stack here: (a+1) x a^(a+2)^(a+2) a
+					   byte(eth::Instruction::SWAP3),
+					   byte(eth::Instruction::POP), // second ++
+					   // Stack here: a x a^(a+2)^(a+2)
+					   byte(eth::Instruction::DUP3), // will change
+					   byte(eth::Instruction::XOR)});
+					   // Stack here: a x a^(a+2)^(a+2)^a
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(assignment)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint a, uint b) { (a += b) * 2; }"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode, {}, {{"test", "f", "a"}, {"test", "f", "b"}});
+
+	// Stack: a, b
+	bytes expectation({byte(eth::Instruction::DUP1),
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::ADD),
+					   // Stack here: a b a+b
+					   byte(eth::Instruction::SWAP2),
+					   byte(eth::Instruction::POP),
+					   byte(eth::Instruction::DUP2),
+					   // Stack here: a+b b a+b
+					   byte(eth::Instruction::PUSH1), 0x2, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::MUL)});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(function_call)
+{
+	char const* sourceCode = "contract test {\n"
+							 "  function f(uint a, uint b) { a += g(a + 1, b) * 2; }\n"
+							 "  function g(uint a, uint b) returns (uint c) {}\n"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode, {{"test", "g"}},
+										{{"test", "f", "a"}, {"test", "f", "b"}});
+
+	// Stack: a, b
+	bytes expectation({byte(eth::Instruction::PUSH1), 0x0d,
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::PUSH1), 0x01, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::ADD),
+					   // Stack here: a b <ret label> (a+1)
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::PUSH1), 0x1a,
+					   byte(eth::Instruction::JUMP),
+					   byte(eth::Instruction::JUMPDEST),
+					   // Stack here: a b g(a+1, b)
+					   byte(eth::Instruction::PUSH1), 0x02, byte(eth::Instruction::PUSH1), 0xff, byte(eth::Instruction::AND),
+					   byte(eth::Instruction::MUL),
+					   // Stack here: a b g(a+1, b)*2
+					   byte(eth::Instruction::DUP3),
+					   byte(eth::Instruction::SWAP1),
+					   byte(eth::Instruction::ADD),
+					   // Stack here: a b a+g(a+1, b)*2
+					   byte(eth::Instruction::SWAP2),
+					   byte(eth::Instruction::POP),
+					   byte(eth::Instruction::DUP2),
+					   byte(eth::Instruction::JUMPDEST)});
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(negative_literals_8bits)
+{
+	// these all fit in 8 bits
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { int8 x = -0 + -1 + -0x01 + -127 + -128; }\n"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation(bytes({byte(eth::Instruction::PUSH1), 0x00,
+							 byte(eth::Instruction::PUSH32)}) + bytes(32, 0xff) +
+					  bytes({byte(eth::Instruction::ADD),
+							 byte(eth::Instruction::PUSH32)}) + bytes(32, 0xff) +
+					  bytes({byte(eth::Instruction::ADD),
+							 byte(eth::Instruction::PUSH32)}) + bytes(31, 0xff) + bytes(1, 0x81) +
+					  bytes({byte(eth::Instruction::ADD),
+							 byte(eth::Instruction::PUSH32)}) + bytes(31, 0xff) + bytes(1, 0x80) +
+					  bytes({byte(eth::Instruction::ADD)}));
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_CASE(negative_literals_16bits)
+{
+	// -1 should need 8 bits, -129 should need 16 bits, how many bits are used is visible
+	// from the SIGNEXTEND opcodes
+	char const* sourceCode = "contract test {\n"
+							 "  function f() { int64 x = int64(-1 + -129); }\n"
+							 "}\n";
+	bytes code = compileFirstExpression(sourceCode);
+
+	bytes expectation(bytes({byte(eth::Instruction::PUSH32)}) + bytes(32, 0xff) +
+					  bytes({byte(eth::Instruction::PUSH1), 0x00,
+							 byte(eth::Instruction::SIGNEXTEND),
+							 byte(eth::Instruction::PUSH32)}) + bytes(31, 0xff) + bytes(1, 0x7f) +
+					  bytes({byte(eth::Instruction::ADD),
+							 byte(eth::Instruction::PUSH1), 0x01,
+							 byte(eth::Instruction::SIGNEXTEND)}));
+	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+}
+}
+} // end namespaces
+
diff --git a/solidityNameAndTypeResolution.cpp b/solidityNameAndTypeResolution.cpp
index 9e34e6d0..f46ad673 100644
--- a/solidityNameAndTypeResolution.cpp
+++ b/solidityNameAndTypeResolution.cpp
@@ -162,6 +162,22 @@ BOOST_AUTO_TEST_CASE(type_checking_function_call)
 	BOOST_CHECK_NO_THROW(parseTextAndResolveNames(text));
 }
 
+BOOST_AUTO_TEST_CASE(type_conversion_for_comparison)
+{
+	char const* text = "contract test {\n"
+					   "  function f() { uint32(2) == int64(2); }"
+					   "}\n";
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNames(text));
+}
+
+BOOST_AUTO_TEST_CASE(type_conversion_for_comparison_invalid)
+{
+	char const* text = "contract test {\n"
+					   "  function f() { int32(2) == uint64(2); }"
+					   "}\n";
+	BOOST_CHECK_THROW(parseTextAndResolveNames(text), TypeError);
+}
+
 BOOST_AUTO_TEST_CASE(type_inference_explicit_conversion)
 {
 	char const* text = "contract test {\n"
diff --git a/solidityParser.cpp b/solidityParser.cpp
index 4ca9370d..9319a02c 100644
--- a/solidityParser.cpp
+++ b/solidityParser.cpp
@@ -211,7 +211,15 @@ BOOST_AUTO_TEST_CASE(else_if_statement)
 	BOOST_CHECK_NO_THROW(parseText(text));
 }
 
-
+BOOST_AUTO_TEST_CASE(statement_starting_with_type_conversion)
+{
+	char const* text = "contract test {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n";
+	BOOST_CHECK_NO_THROW(parseText(text));
+}
 
 BOOST_AUTO_TEST_SUITE_END()
 
diff --git a/solidityScanner.cpp b/solidityScanner.cpp
index d2a960cf..d714699a 100644
--- a/solidityScanner.cpp
+++ b/solidityScanner.cpp
@@ -97,6 +97,27 @@ BOOST_AUTO_TEST_CASE(hex_numbers)
 	BOOST_CHECK_EQUAL(scanner.next(), Token::EOS);
 }
 
+BOOST_AUTO_TEST_CASE(negative_numbers)
+{
+	Scanner scanner(CharStream("var x = -.2 + -0x78 + -7.3 + 8.9;"));
+	BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::VAR);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::ASSIGN);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+	BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "-.2");
+	BOOST_CHECK_EQUAL(scanner.next(), Token::ADD);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+	BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "-0x78");
+	BOOST_CHECK_EQUAL(scanner.next(), Token::ADD);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+	BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "-7.3");
+	BOOST_CHECK_EQUAL(scanner.next(), Token::ADD);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+	BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "8.9");
+	BOOST_CHECK_EQUAL(scanner.next(), Token::SEMICOLON);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::EOS);
+}
+
 BOOST_AUTO_TEST_CASE(locations)
 {
 	Scanner scanner(CharStream("function_identifier has ; -0x743/*comment*/\n ident //comment"));
@@ -109,11 +130,8 @@ BOOST_AUTO_TEST_CASE(locations)
 	BOOST_CHECK_EQUAL(scanner.next(), Token::SEMICOLON);
 	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().start, 24);
 	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end, 25);
-	BOOST_CHECK_EQUAL(scanner.next(), Token::SUB);
-	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().start, 26);
-	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end, 27);
 	BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
-	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().start, 27);
+	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().start, 26);
 	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end, 32);
 	BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
 	BOOST_CHECK_EQUAL(scanner.getCurrentLocation().start, 45);
diff --git a/state.cpp b/state.cpp
index cc772f2c..4034b4b7 100644
--- a/state.cpp
+++ b/state.cpp
@@ -119,10 +119,10 @@ BOOST_AUTO_TEST_CASE(stExample)
 	dev::test::executeTests("stExample", "/StateTests", dev::test::doStateTests);
 }
 
-//BOOST_AUTO_TEST_CASE(stSystemOperationsTest)
-//{
-//	dev::test::executeStateTests("stSystemOperationsTest");
-//}
+BOOST_AUTO_TEST_CASE(stSystemOperationsTest)
+{
+	dev::test::executeTests("stSystemOperationsTest", "/StateTests", dev::test::doStateTests);
+}
 
 BOOST_AUTO_TEST_CASE(tmp)
 {
diff --git a/stateOriginal.cpp b/stateOriginal.cpp
index e6b3ab95..8344894f 100644
--- a/stateOriginal.cpp
+++ b/stateOriginal.cpp
@@ -65,12 +65,7 @@ int stateTest()
 	// Inject a transaction to transfer funds from miner to me.
 	bytes tx;
 	{
-		Transaction t;
-		t.nonce = s.transactionsFrom(myMiner.address());
-		t.value = 1000;			// 1e3 wei.
-		t.type = eth::Transaction::MessageCall;
-		t.receiveAddress = me.address();
-		t.sign(myMiner.secret());
+		Transaction t(1000, 0, 0, me.address(), bytes(), s.transactionsFrom(myMiner.address()), myMiner.secret());
 		assert(t.sender() == myMiner.address());
 		tx = t.rlp();
 	}
diff --git a/vm.cpp b/vm.cpp
index 87670671..a093966d 100644
--- a/vm.cpp
+++ b/vm.cpp
@@ -35,25 +35,14 @@ h160 FakeExtVM::create(u256 _endowment, u256* _gas, bytesConstRef _init, OnOpFun
 {
 	Address na = right160(sha3(rlpList(myAddress, get<1>(addresses[myAddress]))));
 
-	Transaction t;
-	t.value = _endowment;
-	t.gasPrice = gasPrice;
-	t.gas = *_gas;
-	t.data = _init.toBytes();
-	t.type = eth::Transaction::ContractCreation;
+	Transaction t(_endowment, gasPrice, *_gas, _init.toBytes());
 	callcreates.push_back(t);
 	return na;
 }
 
 bool FakeExtVM::call(Address _receiveAddress, u256 _value, bytesConstRef _data, u256* _gas, bytesRef _out, OnOpFunc const&, Address _myAddressOverride, Address _codeAddressOverride)
 {
-	Transaction t;
-	t.value = _value;
-	t.gasPrice = gasPrice;
-	t.gas = *_gas;
-	t.data = _data.toVector();
-	t.type = eth::Transaction::MessageCall;
-	t.receiveAddress = _receiveAddress;
+	Transaction t(_value, gasPrice, *_gas, _receiveAddress, _data.toVector());
 	callcreates.push_back(t);
 	(void)_out;
 	(void)_myAddressOverride;
@@ -224,10 +213,10 @@ mArray FakeExtVM::exportCallCreates()
 	for (Transaction const& tx: callcreates)
 	{
 		mObject o;
-		o["destination"] = tx.type == Transaction::ContractCreation ? "" : toString(tx.receiveAddress);
-		push(o, "gasLimit", tx.gas);
-		push(o, "value", tx.value);
-		o["data"] = "0x" + toHex(tx.data);
+		o["destination"] = tx.isCreation() ? "" : toString(tx.receiveAddress());
+		push(o, "gasLimit", tx.gas());
+		push(o, "value", tx.value());
+		o["data"] = "0x" + toHex(tx.data());
 		ret.push_back(o);
 	}
 	return ret;
@@ -242,12 +231,9 @@ void FakeExtVM::importCallCreates(mArray& _callcreates)
 		BOOST_REQUIRE(tx.count("value") > 0);
 		BOOST_REQUIRE(tx.count("destination") > 0);
 		BOOST_REQUIRE(tx.count("gasLimit") > 0);
-		Transaction t;
-		t.type = tx["destination"].get_str().empty() ? Transaction::ContractCreation : Transaction::MessageCall;
-		t.receiveAddress = Address(tx["destination"].get_str());
-		t.value = toInt(tx["value"]);
-		t.gas = toInt(tx["gasLimit"]);
-		t.data = importData(tx);
+		Transaction t = tx["destination"].get_str().empty() ?
+			Transaction(toInt(tx["value"]), 0, toInt(tx["gasLimit"]), data.toBytes()) :
+			Transaction(toInt(tx["value"]), 0, toInt(tx["gasLimit"]), Address(tx["destination"].get_str()), data.toBytes());
 		callcreates.push_back(t);
 	}
 }
@@ -427,26 +413,16 @@ BOOST_AUTO_TEST_CASE(vmBlockInfoTest)
 	dev::test::executeTests("vmBlockInfoTest", "/VMTests", dev::test::doVMTests);
 }
 
-//BOOST_AUTO_TEST_CASE(vmIOandFlowOperationsTest)
-//{
-//	dev::test::executeTests("vmIOandFlowOperationsTest", "/VMTests", dev::test::doVMTests);
-//}
-
-BOOST_AUTO_TEST_CASE(vmPushDupSwapTest)
+BOOST_AUTO_TEST_CASE(vmIOandFlowOperationsTest)
 {
-	dev::test::executeTests("vmPushDupSwapTest", "/VMTests", dev::test::doVMTests);
+	dev::test::executeTests("vmIOandFlowOperationsTest", "/VMTests", dev::test::doVMTests);
 }
 
-BOOST_AUTO_TEST_CASE(vmNamecoin)
+BOOST_AUTO_TEST_CASE(vmPushDupSwapTest)
 {
-	dev::test::executeTests("vmNamecoin", "/VMTests", dev::test::doVMTests);
+	dev::test::executeTests("vmPushDupSwapTest", "/VMTests", dev::test::doVMTests);
 }
 
-//BOOST_AUTO_TEST_CASE(vmSystemOperationsTest)
-//{
-//	dev::test::executeTests("vmSystemOperationsTest", "/VMTests", dev::test::doVMTests);
-//}
-
 BOOST_AUTO_TEST_CASE(userDefinedFile)
 {
 	if (boost::unit_test::framework::master_test_suite().argc == 2)
diff --git a/vm.h b/vm.h
index 1ed33e5f..a52a02e3 100644
--- a/vm.h
+++ b/vm.h
@@ -29,7 +29,7 @@ along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
 #include "JsonSpiritHeaders.h"
 #include <libdevcore/Log.h>
 #include <libdevcore/CommonIO.h>
-#include <libevmface/Instruction.h>
+#include <libevmcore/Instruction.h>
 #include <libevm/ExtVMFace.h>
 #include <libevm/VM.h>
 #include <liblll/Compiler.h>
diff --git a/vmArithmeticTestFiller.json b/vmArithmeticTestFiller.json
index 30cd11eb..29d523a3 100644
--- a/vmArithmeticTestFiller.json
+++ b/vmArithmeticTestFiller.json
@@ -1094,78 +1094,22 @@
         }
     },
 
-    "exp0": {
-        "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
-        },
-        "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 2 2)}",
-            "storage": {}
-        }
-        },
-        "exec" : {
-            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
-            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-            "value" : "1000000000000000000",
-            "data" : "",
-            "gasPrice" : "100000000000000",
-            "gas" : "10000"
-        }
-    },
-
-    "exp1": {
+    "addmod0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
-        },
-        "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 115792089237316195423570985008687907853269984665640564039457584007913129639935 115792089237316195423570985008687907853269984665640564039457584007913129639934 )}",
-            "storage": {}
-        }
-        },
-        "exec" : {
-            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
-            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-            "value" : "1000000000000000000",
-            "data" : "",
-            "gasPrice" : "100000000000000",
-            "gas" : "10000"
-        }
-    },
-
-    "exp2": {
-        "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 2147483647 2147483647)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (ADDMOD 1 2 2) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1178,22 +1122,22 @@
         }
     },
 
-    "exp3": {
+    "addmod1": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 0 2147483647)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (ADDMOD (- 0 1) (- 0 2) 2) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1206,22 +1150,22 @@
         }
     },
 
-    "exp4": {
+    "addmod2": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 2147483647 0)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (ADDMOD (- 0 6) 1 3) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1234,22 +1178,22 @@
         }
     },
 
-    "exp5": {
+    "addmod2_0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 257 1)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (EQ (SMOD (- 0 5) 3) (ADDMOD (- 0 6) 1 3) ) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1262,22 +1206,22 @@
         }
     },
 
-    "exp6": {
+    "addmod2_1": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 1 257)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{[[ 0 ]] (EQ (MOD (- 0 5) 3) (ADDMOD (- 0 6) 1 3) ) }",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1290,22 +1234,22 @@
         }
     },
 
-    "exp7": {
+    "addmod3": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EXP 2 257)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (ADDMOD 4 1 (- 0 3) )} ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1318,23 +1262,22 @@
         }
     },
 
-
-    "bnot0": {
+    "addmod3_0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (BNOT 0 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (EQ (ADDMOD 4 1 (- 0 3) ) 2 ) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1347,50 +1290,23 @@
         }
     },
 
-    "bnot1": {
-        "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
-        },
-        "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (BNOT 2 )}",
-            "storage": {}
-        }
-        },
-        "exec" : {
-            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
-            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-            "value" : "1000000000000000000",
-            "data" : "",
-            "gasPrice" : "100000000000000",
-            "gas" : "10000"
-        }
-    },
 
-    "bnot2": {
+    "mulmod0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (BNOT 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (MULMOD 1 2 2) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1403,22 +1319,22 @@
         }
     },
 
-    "bnot3": {
+    "mulmod1": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (BNOT (- 0 2) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (MULMOD (- 0 1) (- 0 2) 3) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1431,22 +1347,22 @@
         }
     },
 
-    "bnot4": {
+    "mulmod2": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (BNOT (- 0 115792089237316195423570985008687907853269984665640564039457584007913129639935) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (MULMOD (- 0 5) 1 3) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1459,22 +1375,22 @@
         }
     },
 
-    "bnot5": {
+    "mulmod2_0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (BNOT (- 0 0) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (EQ (SMOD (- 0 5) 3) (MULMOD (- 0 5) 1 3) ) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1487,22 +1403,22 @@
         }
     },
 
-    "lt0": {
+    "mulmod2_1": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (LT (- 0 2) 0 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{[[ 0 ]] (EQ (MOD (- 0 5) 3) (MULMOD (- 0 5) 1 3) ) }",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1515,22 +1431,22 @@
         }
     },
 
-    "lt1": {
+    "mulmod3": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (LT 0 (- 0 2) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (MULMOD 5 1 (- 0 3) )} ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1543,22 +1459,22 @@
         }
     },
 
-    "lt2": {
+    "mulmod3_0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (LT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (EQ (MULMOD 5 1 (- 0 3) ) 2 )} ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1572,7 +1488,7 @@
     },
 
 
-    "lt3": {
+    "exp0": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1585,7 +1501,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (LT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "code" : "{ [[ 0 ]] (EXP 2 2)}",
             "storage": {}
         }
         },
@@ -1600,7 +1516,7 @@
         }
     },
 
-    "gt0": {
+    "exp1": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1613,7 +1529,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] ( GT (- 0 2) 0 )}",
+            "code" : "{ [[ 0 ]] (EXP 115792089237316195423570985008687907853269984665640564039457584007913129639935 115792089237316195423570985008687907853269984665640564039457584007913129639934 )}",
             "storage": {}
         }
         },
@@ -1628,7 +1544,7 @@
         }
     },
 
-    "gt1": {
+    "exp2": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1641,7 +1557,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (GT 0 (- 0 2) )}",
+            "code" : "{ [[ 0 ]] (EXP 2147483647 2147483647)}",
             "storage": {}
         }
         },
@@ -1656,7 +1572,7 @@
         }
     },
 
-    "gt2": {
+    "exp3": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1669,7 +1585,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (GT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
+            "code" : "{ [[ 0 ]] (EXP 0 2147483647)}",
             "storage": {}
         }
         },
@@ -1684,8 +1600,7 @@
         }
     },
 
-
-    "gt3": {
+    "exp4": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1698,7 +1613,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (GT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "code" : "{ [[ 0 ]] (EXP 2147483647 0)}",
             "storage": {}
         }
         },
@@ -1713,7 +1628,7 @@
         }
     },
 
-    "slt0": {
+    "exp5": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1726,7 +1641,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SLT (- 0 2) 0 )}",
+            "code" : "{ [[ 0 ]] (EXP 257 1)}",
             "storage": {}
         }
         },
@@ -1741,7 +1656,7 @@
         }
     },
 
-    "slt1": {
+    "exp6": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1754,7 +1669,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SLT 0 (- 0 2) )}",
+            "code" : "{ [[ 0 ]] (EXP 1 257)}",
             "storage": {}
         }
         },
@@ -1769,7 +1684,7 @@
         }
     },
 
-    "slt2": {
+    "exp7": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -1782,7 +1697,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SLT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
+            "code" : "{ [[ 0 ]] (EXP 2 257)}",
             "storage": {}
         }
         },
@@ -1797,23 +1712,22 @@
         }
     },
 
-
-    "slt3": {
+    "signextend_bitIsSet": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SLT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x62122ff4600016600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1826,22 +1740,22 @@
         }
     },
 
-    "slt4": {
+    "signextend_BitIsNotSet": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SLT (- 0 5) (- 0 3) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x62122f6a600016600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1854,22 +1768,22 @@
         }
     },
 
-    "sgt0": {
+    "signextend_BitIsSetInHigherByte": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SGT (- 0 2) 0 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x6212faf4600116600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1882,22 +1796,22 @@
         }
     },
 
-    "sgt1": {
+    "signextend_BitIsNotSetInHigherByte": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SGT 0 (- 0 2) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x62126af4600116600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1910,22 +1824,22 @@
         }
     },
 
-    "sgt2": {
+    "signextendInvalidByteNumber": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SGT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x62126af4605016600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1938,23 +1852,22 @@
         }
     },
 
-
-    "sgt3": {
+    "signextend_00": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SGT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (SIGNEXTEND 0 0) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1967,22 +1880,22 @@
         }
     },
 
-    "sgt4": {
+    "signextend_BigByte_0": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (SGT (- 0 5) (- 0 3) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (SIGNEXTEND 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1995,22 +1908,22 @@
         }
     },
 
-    "eq0": {
+    "signextend_0_BigByte": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EQ (- 0 5) (- 0 3) )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (SIGNEXTEND 0 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -2023,22 +1936,22 @@
         }
     },
 
-    "eq1": {
+    "signextend_BigByteBigByte": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EQ 0 0)}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (SIGNEXTEND 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -2051,22 +1964,22 @@
         }
     },
 
-    "eq2": {
+    "signextend_AlmostBiggestByte": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (EQ 115792089237316195423570985008687907853269984665640564039457584007913129639935 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "{ [[ 0 ]] (SIGNEXTEND 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe) } ",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -2079,22 +1992,22 @@
         }
     },
 
-    "not0": {
+    "signextend_bigBytePlus1": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (NOT 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x66f000000000000161ffff16600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -2107,22 +2020,22 @@
         }
     },
 
-    "not1": {
+    "signextend_BigBytePlus1_2": {
         "env" : {
-        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-        "currentNumber" : "0",
-        "currentGasLimit" : "1000000",
-        "currentDifficulty" : "256",
-        "currentTimestamp" : 1,
-        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+            "currentNumber" : "0",
+            "currentGasLimit" : "1000000",
+            "currentDifficulty" : "256",
+            "currentTimestamp" : 1,
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-            "balance" : "1000000000000000000",
-            "nonce" : 0,
-            "code" : "{ [[ 0 ]] (NOT 0 )}",
-            "storage": {}
-        }
+            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+                "balance" : "1000000000000000000",
+                "nonce" : 0,
+                "code" : "0x60ff68f0000000000000000116600057",
+                "storage": {}
+            }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -2133,8 +2046,5 @@
             "gasPrice" : "100000000000000",
             "gas" : "10000"
         }
-    },
-
-
-
+    }
 }
diff --git a/vmBitwiseLogicOperationTestFiller.json b/vmBitwiseLogicOperationTestFiller.json
index 1acbbd42..d0956e26 100644
--- a/vmBitwiseLogicOperationTestFiller.json
+++ b/vmBitwiseLogicOperationTestFiller.json
@@ -1,20 +1,20 @@
 {
-    "and0": {
+    "lt0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (AND 2 2) }",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (LT (- 0 2) 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -27,22 +27,22 @@
         }
     },
 
-    "and1": {
+    "lt1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (AND 2 1) }",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (LT 0 (- 0 2) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -55,22 +55,22 @@
         }
     },
 
-    "and2": {
+    "lt2": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (AND 3 1) }",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (LT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -82,22 +82,24 @@
             "gas" : "10000"
         }
     },
-    "and3": {
+
+
+    "lt3": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (AND 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (LT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -109,22 +111,23 @@
             "gas" : "10000"
         }
     },
-    "and4": {
+
+    "gt0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (AND 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] ( GT (- 0 2) 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -137,22 +140,22 @@
         }
     },
 
-    "and5": {
+    "gt1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (AND 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeefeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (GT 0 (- 0 2) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -165,22 +168,22 @@
         }
     },
 
-    "or0": {
+    "gt2": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (OR 2 2) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (GT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -193,22 +196,23 @@
         }
     },
 
-    "or1": {
+
+    "gt3": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (OR 2 1) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (GT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -221,22 +225,22 @@
         }
     },
 
-    "or2": {
+    "slt0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (OR 3 1) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SLT (- 0 2) 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -248,22 +252,23 @@
             "gas" : "10000"
         }
     },
-    "or3": {
+
+    "slt1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (OR 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SLT 0 (- 0 2) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -275,22 +280,23 @@
             "gas" : "10000"
         }
     },
-    "or4": {
+
+    "slt2": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (OR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SLT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -303,22 +309,23 @@
         }
     },
 
-    "or5": {
+
+    "slt3": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (OR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeefeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SLT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -331,22 +338,22 @@
         }
     },
 
-    "xor0": {
+    "slt4": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (XOR 2 2) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SLT (- 0 5) (- 0 3) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -359,22 +366,22 @@
         }
     },
 
-    "xor1": {
+    "sgt0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (XOR 2 1) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SGT (- 0 2) 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -387,22 +394,22 @@
         }
     },
 
-    "xor2": {
+    "sgt1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (XOR 3 1) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SGT 0 (- 0 2) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -414,22 +421,23 @@
             "gas" : "10000"
         }
     },
-    "xor3": {
+
+    "sgt2": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (XOR 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SGT 115792089237316195423570985008687907853269984665640564039457584007913129639935 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -441,22 +449,24 @@
             "gas" : "10000"
         }
     },
-    "xor4": {
+
+
+    "sgt3": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (XOR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SGT 0 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -469,22 +479,22 @@
         }
     },
 
-    "xor5": {
+    "sgt4": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (XOR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeefeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (SGT (- 0 5) (- 0 3) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -497,22 +507,22 @@
         }
     },
 
-    "byte0": {
+    "eq0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 0) 0x8040201008040201 ) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (EQ (- 0 5) (- 0 3) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -524,22 +534,23 @@
             "gas" : "10000"
         }
     },
-    "byte1": {
+
+    "eq1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 1) 0x8040201008040201 ) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (EQ 0 0)}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -551,22 +562,23 @@
             "gas" : "10000"
         }
     },
-    "byte2": {
+
+    "eq2": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 2) 0x8040201008040201 ) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (EQ 115792089237316195423570985008687907853269984665640564039457584007913129639935 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -579,22 +591,22 @@
         }
     },
 
-    "byte3": {
+    "iszero0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 3) 0x8040201008040201 ) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (ISZERO 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -607,22 +619,49 @@
         }
     },
 
-    "byte4": {
+    "iszero1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 4) 0x8040201008040201 ) } ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (ISZERO 0 )}",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+    "iszeo2": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (ISZERO (- 0 2) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -635,7 +674,7 @@
         }
     },
 
-    "byte5": {
+    "and0": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -648,7 +687,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 5) 0x8040201008040201 ) } ",
+                "code" : "{ [[ 0 ]] (AND 2 2) }",
                 "storage": {}
             }
         },
@@ -663,8 +702,7 @@
         }
     },
 
-
-    "byte6": {
+    "and1": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -677,7 +715,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 6) 0x8040201008040201 ) } ",
+                "code" : "{ [[ 0 ]] (AND 2 1) }",
                 "storage": {}
             }
         },
@@ -692,7 +730,7 @@
         }
     },
 
-    "byte7": {
+    "and2": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -705,7 +743,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 7) 0x8040201008040201 ) } ",
+                "code" : "{ [[ 0 ]] (AND 3 1) }",
                 "storage": {}
             }
         },
@@ -719,9 +757,7 @@
             "gas" : "10000"
         }
     },
-
-
-    "byte8": {
+    "and3": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -734,7 +770,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (- 31 31) 0x8040201008040201 ) } ",
+                "code" : "{ [[ 0 ]] (AND 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef) } ",
                 "storage": {}
             }
         },
@@ -748,8 +784,7 @@
             "gas" : "10000"
         }
     },
-
-    "byte9": {
+    "and4": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -762,7 +797,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE (SDIV 31 32) 0x8040201008040201 ) } ",
+                "code" : "{ [[ 0 ]] (AND 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
                 "storage": {}
             }
         },
@@ -777,7 +812,7 @@
         }
     },
 
-    "byte10": {
+    "and5": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -790,7 +825,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x8040201008040201 ) } ",
+                "code" : "{ [[ 0 ]] (AND 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeefeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
                 "storage": {}
             }
         },
@@ -805,7 +840,7 @@
         }
     },
 
-    "byte11": {
+    "or0": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -818,7 +853,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (BYTE 0 0x8040201008040201) } ",
+                "code" : "{ [[ 0 ]] (OR 2 2) } ",
                 "storage": {}
             }
         },
@@ -833,7 +868,7 @@
         }
     },
 
-    "addmod0": {
+    "or1": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -846,7 +881,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (ADDMOD 1 2 2) } ",
+                "code" : "{ [[ 0 ]] (OR 2 1) } ",
                 "storage": {}
             }
         },
@@ -861,7 +896,7 @@
         }
     },
 
-    "addmod1": {
+    "or2": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -874,7 +909,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (ADDMOD (- 0 1) (- 0 2) 2) } ",
+                "code" : "{ [[ 0 ]] (OR 3 1) } ",
                 "storage": {}
             }
         },
@@ -888,8 +923,7 @@
             "gas" : "10000"
         }
     },
-
-    "addmod2": {
+    "or3": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -902,7 +936,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (ADDMOD (- 0 6) 1 3) } ",
+                "code" : "{ [[ 0 ]] (OR 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef) } ",
                 "storage": {}
             }
         },
@@ -916,8 +950,7 @@
             "gas" : "10000"
         }
     },
-
-    "addmod2_0": {
+    "or4": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -930,7 +963,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (EQ (SMOD (- 0 5) 3) (ADDMOD (- 0 6) 1 3) ) } ",
+                "code" : "{ [[ 0 ]] (OR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
                 "storage": {}
             }
         },
@@ -945,7 +978,7 @@
         }
     },
 
-    "addmod2_1": {
+    "or5": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -958,7 +991,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{[[ 0 ]] (EQ (MOD (- 0 5) 3) (ADDMOD (- 0 6) 1 3) ) }",
+                "code" : "{ [[ 0 ]] (OR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeefeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
                 "storage": {}
             }
         },
@@ -973,7 +1006,7 @@
         }
     },
 
-    "addmod3": {
+    "xor0": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -986,7 +1019,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (ADDMOD 4 1 (- 0 3) )} ",
+                "code" : "{ [[ 0 ]] (XOR 2 2) } ",
                 "storage": {}
             }
         },
@@ -1001,7 +1034,7 @@
         }
     },
 
-    "addmod3_0": {
+    "xor1": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1014,7 +1047,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (EQ (ADDMOD 4 1 (- 0 3) ) 2 ) } ",
+                "code" : "{ [[ 0 ]] (XOR 2 1) } ",
                 "storage": {}
             }
         },
@@ -1029,8 +1062,7 @@
         }
     },
 
-
-    "mulmod0": {
+    "xor2": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1043,7 +1075,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (MULMOD 1 2 2) } ",
+                "code" : "{ [[ 0 ]] (XOR 3 1) } ",
                 "storage": {}
             }
         },
@@ -1057,8 +1089,7 @@
             "gas" : "10000"
         }
     },
-
-    "mulmod1": {
+    "xor3": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1071,7 +1102,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (MULMOD (- 0 1) (- 0 2) 3) } ",
+                "code" : "{ [[ 0 ]] (XOR 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef) } ",
                 "storage": {}
             }
         },
@@ -1085,8 +1116,7 @@
             "gas" : "10000"
         }
     },
-
-    "mulmod2": {
+    "xor4": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1099,7 +1129,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (MULMOD (- 0 5) 1 3) } ",
+                "code" : "{ [[ 0 ]] (XOR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
                 "storage": {}
             }
         },
@@ -1114,7 +1144,7 @@
         }
     },
 
-    "mulmod2_0": {
+    "xor5": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1127,7 +1157,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (EQ (SMOD (- 0 5) 3) (MULMOD (- 0 5) 1 3) ) } ",
+                "code" : "{ [[ 0 ]] (XOR 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeefeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
                 "storage": {}
             }
         },
@@ -1142,22 +1172,22 @@
         }
     },
 
-    "mulmod2_1": {
+    "not0": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{[[ 0 ]] (EQ (MOD (- 0 5) 3) (MULMOD (- 0 5) 1 3) ) }",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (NOT 0 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1170,22 +1200,22 @@
         }
     },
 
-    "mulmod3": {
+    "not1": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (MULMOD 5 1 (- 0 3) )} ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (NOT 2 )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1198,22 +1228,50 @@
         }
     },
 
-    "mulmod3_0": {
+    "not2": {
         "env" : {
-            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-            "currentNumber" : "0",
-            "currentGasLimit" : "1000000",
-            "currentDifficulty" : "256",
-            "currentTimestamp" : 1,
-            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
         },
         "pre" : {
-            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-                "balance" : "1000000000000000000",
-                "nonce" : 0,
-                "code" : "{ [[ 0 ]] (EQ (MULMOD 5 1 (- 0 3) ) 2 )} ",
-                "storage": {}
-            }
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (NOT 115792089237316195423570985008687907853269984665640564039457584007913129639935 )}",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "not3": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (NOT (- 0 2) )}",
+            "storage": {}
+        }
         },
         "exec" : {
             "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
@@ -1226,7 +1284,63 @@
         }
     },
 
-    "signextend_bitIsSet": {
+    "not4": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (NOT (- 0 115792089237316195423570985008687907853269984665640564039457584007913129639935) )}",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "not5": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ [[ 0 ]] (NOT (- 0 0) )}",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "byte0": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1239,7 +1353,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x62122ff4600016600057",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 0) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1253,8 +1367,7 @@
             "gas" : "10000"
         }
     },
-
-    "signextend_BitIsNotSet": {
+    "byte1": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1267,7 +1380,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x62122f6a600016600057",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 1) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1281,8 +1394,7 @@
             "gas" : "10000"
         }
     },
-
-    "signextend_BitIsSetInHigherByte": {
+    "byte2": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1295,7 +1407,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6212faf4600116600057",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 2) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1310,7 +1422,7 @@
         }
     },
 
-    "signextend_BitIsNotSetInHigherByte": {
+    "byte3": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1323,7 +1435,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x62126af4600116600057",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 3) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1338,7 +1450,7 @@
         }
     },
 
-    "signextendInvalidByteNumber": {
+    "byte4": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1351,7 +1463,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x62126af4605016600057",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 4) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1366,7 +1478,7 @@
         }
     },
 
-    "signextend_00": {
+    "byte5": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1379,7 +1491,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SIGNEXTEND 0 0) } ",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 5) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1394,7 +1506,8 @@
         }
     },
 
-    "signextend_BigByte_0": {
+
+    "byte6": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1407,7 +1520,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SIGNEXTEND 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0) } ",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 6) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1422,7 +1535,7 @@
         }
     },
 
-    "signextend_0_BigByte": {
+    "byte7": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1435,7 +1548,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SIGNEXTEND 0 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 7) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1450,7 +1563,8 @@
         }
     },
 
-    "signextend_BigByteBigByte": {
+
+    "byte8": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1463,7 +1577,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SIGNEXTEND 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) } ",
+                "code" : "{ [[ 0 ]] (BYTE (- 31 31) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1478,7 +1592,7 @@
         }
     },
 
-    "signextend_AlmostBiggestByte": {
+    "byte9": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1491,7 +1605,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SIGNEXTEND 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe) } ",
+                "code" : "{ [[ 0 ]] (BYTE (SDIV 31 32) 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1506,7 +1620,7 @@
         }
     },
 
-    "signextend_bigBytePlus1": {
+    "byte10": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1519,7 +1633,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x66f000000000000161ffff16600057",
+                "code" : "{ [[ 0 ]] (BYTE 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0x8040201008040201 ) } ",
                 "storage": {}
             }
         },
@@ -1534,7 +1648,7 @@
         }
     },
 
-    "signextend_BigBytePlus1_2": {
+    "byte11": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -1547,7 +1661,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60ff68f0000000000000000116600057",
+                "code" : "{ [[ 0 ]] (BYTE 0 0x8040201008040201) } ",
                 "storage": {}
             }
         },
diff --git a/vmIOandFlowOperationsTestFiller.json b/vmIOandFlowOperationsTestFiller.json
index a470b9c8..e2ec1def 100644
--- a/vmIOandFlowOperationsTestFiller.json
+++ b/vmIOandFlowOperationsTestFiller.json
@@ -12,7 +12,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x6002600360045057",
+            "code" : "0x6002600360045055",
             "storage": {}
         }
         },
@@ -40,7 +40,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x5060026003600457",
+            "code" : "0x5060026003600455",
             "storage": {}
         }
         },
@@ -68,7 +68,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x600260035157",
+            "code" : "0x600260035155",
             "storage": {}
         }
         },
@@ -96,7 +96,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x600260035257",
+            "code" : "0x600260035255",
             "storage": {}
         }
         },
@@ -488,7 +488,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x6023600058",
+            "code" : "0x600056",
             "storage": {}
         }
         },
@@ -516,7 +516,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x60236007586001600257",
+            "code" : "0x60236007566001600255",
             "storage": {}
         }
         },
@@ -543,7 +543,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x602360085860015d600257",
+            "code" : "0x602360075660015b600255",
             "storage": {}
         }
         },
@@ -571,7 +571,91 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x602360075860015d600257",
+            "code" : "0x602360085660015b600255",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "jump0_jumpdest2": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "0x6023600a6008505660015b600255",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "jump0_jumpdest3": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "0x6023600b6008505660015b600255",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "jump1": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "0x620fffff620fffff0156",
             "storage": {}
         }
         },
@@ -599,7 +683,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x602360016009596001600257",
+            "code" : "0x602360016009576001600255",
             "storage": {}
         }
         },
@@ -627,7 +711,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x60236001600a5960015d600257",
+            "code" : "0x60236001600a5760015b600255",
             "storage": {}
         }
         },
@@ -655,7 +739,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x602360006009596001600257",
+            "code" : "0x602360006009576001600255",
             "storage": {}
         }
         },
@@ -683,7 +767,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "0x60017fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff596002600357",
+            "code" : "0x60017fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff576002600355",
             "storage": {}
         }
         },
diff --git a/vmPushDupSwapTestFiller.json b/vmPushDupSwapTestFiller.json
index 52c704d4..3fc7e4a7 100644
--- a/vmPushDupSwapTestFiller.json
+++ b/vmPushDupSwapTestFiller.json
@@ -12,7 +12,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60ff600357",
+                "code" : "0x60ff600355",
                 "storage": {}
             }
         },
@@ -68,7 +68,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x61eeff600357",
+                "code" : "0x61eeff600355",
                 "storage": {}
             }
         },
@@ -96,7 +96,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x62ddeeff600357",
+                "code" : "0x62ddeeff600355",
                 "storage": {}
             }
         },
@@ -124,7 +124,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x63ccddeeff600357",
+                "code" : "0x63ccddeeff600355",
                 "storage": {}
             }
         },
@@ -152,7 +152,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x64bbccddeeff600357",
+                "code" : "0x64bbccddeeff600355",
                 "storage": {}
             }
         },
@@ -180,7 +180,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x65aabbccddeeff600357",
+                "code" : "0x65aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -208,7 +208,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6699aabbccddeeff600357",
+                "code" : "0x6699aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -236,7 +236,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x678899aabbccddeeff600357",
+                "code" : "0x678899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -264,7 +264,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x68778899aabbccddeeff600357",
+                "code" : "0x68778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -292,7 +292,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6966778899aabbccddeeff600357",
+                "code" : "0x6966778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -320,7 +320,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6a5566778899aabbccddeeff600357",
+                "code" : "0x6a5566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -348,7 +348,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6b445566778899aabbccddeeff600357",
+                "code" : "0x6b445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -376,7 +376,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6c33445566778899aabbccddeeff600357",
+                "code" : "0x6c33445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -404,7 +404,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6d2233445566778899aabbccddeeff600357",
+                "code" : "0x6d2233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -432,7 +432,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6e112233445566778899aabbccddeeff600357",
+                "code" : "0x6e112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -460,7 +460,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6f10112233445566778899aabbccddeeff600357",
+                "code" : "0x6f10112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -488,7 +488,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x70ff00112233445566778899aabbccddeeff600357",
+                "code" : "0x70ff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -516,7 +516,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x71eeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x71eeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -544,7 +544,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x72ddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x72ddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -572,7 +572,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x73ccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x73ccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -600,7 +600,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x74bbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x74bbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -628,7 +628,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x75aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x75aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -656,7 +656,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7699aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7699aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -684,7 +684,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -712,7 +712,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x78778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x78778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -740,7 +740,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7966778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7966778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -769,7 +769,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7a5566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7a5566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -797,7 +797,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7b445566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7b445566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -825,7 +825,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7c33445566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7c33445566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -853,7 +853,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7d2233445566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7d2233445566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -881,7 +881,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7e112233445566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7e112233445566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -909,7 +909,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -937,7 +937,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7fff10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff600357",
+                "code" : "0x7fff10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff600355",
                 "storage": {}
             }
         },
@@ -965,7 +965,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff80600357",
+                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff80600355",
                 "storage": {}
             }
         },
@@ -993,7 +993,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff81600357",
+                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff81600355",
                 "storage": {}
             }
         },
@@ -1021,7 +1021,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6002600181600357",
+                "code" : "0x6002600181600355",
                 "storage": {}
             }
         },
@@ -1049,7 +1049,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60036002600182600357",
+                "code" : "0x60036002600182600355",
                 "storage": {}
             }
         },
@@ -1077,7 +1077,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600460036002600183600357",
+                "code" : "0x600460036002600183600355",
                 "storage": {}
             }
         },
@@ -1105,7 +1105,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6005600460036002600184600357",
+                "code" : "0x6005600460036002600184600355",
                 "storage": {}
             }
         },
@@ -1133,7 +1133,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60066005600460036002600185600357",
+                "code" : "0x60066005600460036002600185600355",
                 "storage": {}
             }
         },
@@ -1161,7 +1161,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600760066005600460036002600186600357",
+                "code" : "0x600760066005600460036002600186600355",
                 "storage": {}
             }
         },
@@ -1189,7 +1189,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6008600760066005600460036002600187600357",
+                "code" : "0x6008600760066005600460036002600187600355",
                 "storage": {}
             }
         },
@@ -1217,7 +1217,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60096008600760066005600460036002600188600357",
+                "code" : "0x60096008600760066005600460036002600188600355",
                 "storage": {}
             }
         },
@@ -1245,7 +1245,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600a60096008600760066005600460036002600189600357",
+                "code" : "0x600a60096008600760066005600460036002600189600355",
                 "storage": {}
             }
         },
@@ -1273,7 +1273,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600b600a6009600860076006600560046003600260018a600357",
+                "code" : "0x600b600a6009600860076006600560046003600260018a600355",
                 "storage": {}
             }
         },
@@ -1301,7 +1301,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600c600b600a6009600860076006600560046003600260018b600357",
+                "code" : "0x600c600b600a6009600860076006600560046003600260018b600355",
                 "storage": {}
             }
         },
@@ -1329,7 +1329,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600d600c600b600a6009600860076006600560046003600260018c600357",
+                "code" : "0x600d600c600b600a6009600860076006600560046003600260018c600355",
                 "storage": {}
             }
         },
@@ -1357,7 +1357,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600e600d600c600b600a6009600860076006600560046003600260018d600357",
+                "code" : "0x600e600d600c600b600a6009600860076006600560046003600260018d600355",
                 "storage": {}
             }
         },
@@ -1385,7 +1385,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600f600e600d600c600b600a6009600860076006600560046003600260018e600357",
+                "code" : "0x600f600e600d600c600b600a6009600860076006600560046003600260018e600355",
                 "storage": {}
             }
         },
@@ -1413,7 +1413,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6010600f600e600d600c600b600a6009600860076006600560046003600260018f600357",
+                "code" : "0x6010600f600e600d600c600b600a6009600860076006600560046003600260018f600355",
                 "storage": {}
             }
         },
@@ -1441,7 +1441,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff60039057",
+                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff60039055",
                 "storage": {}
             }
         },
@@ -1469,7 +1469,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff60039157",
+                "code" : "0x7f10112233445566778899aabbccddeeff00112233445566778899aabbccddeeff60039155",
                 "storage": {}
             }
         },
@@ -1497,7 +1497,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6002600160039157",
+                "code" : "0x6002600160039155",
                 "storage": {}
             }
         },
@@ -1525,7 +1525,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60036002600160039257",
+                "code" : "0x60036002600160039255",
                 "storage": {}
             }
         },
@@ -1553,7 +1553,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600460036002600160039357",
+                "code" : "0x600460036002600160039355",
                 "storage": {}
             }
         },
@@ -1581,7 +1581,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6005600460036002600160039457",
+                "code" : "0x6005600460036002600160039455",
                 "storage": {}
             }
         },
@@ -1609,7 +1609,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60066005600460036002600160039557",
+                "code" : "0x60066005600460036002600160039555",
                 "storage": {}
             }
         },
@@ -1637,7 +1637,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600760066005600460036002600160039657",
+                "code" : "0x600760066005600460036002600160039655",
                 "storage": {}
             }
         },
@@ -1665,7 +1665,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6008600760066005600460036002600160039757",
+                "code" : "0x6008600760066005600460036002600160039755",
                 "storage": {}
             }
         },
@@ -1693,7 +1693,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x60096008600760066005600460036002600160039857",
+                "code" : "0x60096008600760066005600460036002600160039855",
                 "storage": {}
             }
         },
@@ -1721,7 +1721,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600a60096008600760066005600460036002600160039957",
+                "code" : "0x600a60096008600760066005600460036002600160039955",
                 "storage": {}
             }
         },
@@ -1749,7 +1749,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600b600a60096008600760066005600460036002600160039a57",
+                "code" : "0x600b600a60096008600760066005600460036002600160039a55",
                 "storage": {}
             }
         },
@@ -1777,7 +1777,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600c600b600a60096008600760066005600460036002600160039b57",
+                "code" : "0x600c600b600a60096008600760066005600460036002600160039b55",
                 "storage": {}
             }
         },
@@ -1805,7 +1805,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600d600c600b600a60096008600760066005600460036002600160039c57",
+                "code" : "0x600d600c600b600a60096008600760066005600460036002600160039c55",
                 "storage": {}
             }
         },
@@ -1833,7 +1833,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600e600d600c600b600a60096008600760066005600460036002600160039d57",
+                "code" : "0x600e600d600c600b600a60096008600760066005600460036002600160039d55",
                 "storage": {}
             }
         },
@@ -1861,7 +1861,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x600f600e600d600c600b600a60096008600760066005600460036002600160039e57",
+                "code" : "0x600f600e600d600c600b600a60096008600760066005600460036002600160039e55",
                 "storage": {}
             }
         },
@@ -1889,7 +1889,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "0x6010600f600e600d600c600b600a60096008600760066005600460036002600160039f57",
+                "code" : "0x6010600f600e600d600c600b600a60096008600760066005600460036002600160039f55",
                 "storage": {}
             }
         },
diff --git a/vmSha3TestFiller.json b/vmSha3TestFiller.json
index 03391e8c..7ed72952 100644
--- a/vmSha3TestFiller.json
+++ b/vmSha3TestFiller.json
@@ -111,7 +111,7 @@
         }
     },
 
-    "sha3_3": {
+    "sha3_4": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -139,7 +139,7 @@
         }
     },
 
-    "sha3_4": {
+    "sha3_5": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -152,7 +152,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SHA3  0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 100)}",
+                "code" : "{ [[ 0 ]] (SHA3 10000 0xfffffffff )}",
                 "storage": {}
             }
         },
@@ -167,7 +167,7 @@
         }
     },
 
-    "sha3_4": {
+    "sha3_6": {
         "env" : {
             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
             "currentNumber" : "0",
@@ -180,7 +180,7 @@
             "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
                 "balance" : "1000000000000000000",
                 "nonce" : 0,
-                "code" : "{ [[ 0 ]] (SHA3  0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)}",
+                "code" : "{ [[ 0 ]] (SHA3 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)}",
                 "storage": {}
             }
         },
@@ -193,33 +193,5 @@
             "gasPrice" : "100000000000000",
             "gas" : "10000"
         }
-    },
-
-//    "sha3_5": {
-//        "env" : {
-//            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
-//            "currentNumber" : "0",
-//            "currentGasLimit" : "1000000",
-//            "currentDifficulty" : "256",
-//            "currentTimestamp" : 1,
-//            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
-//        },
-//        "pre" : {
-//            "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
-//                "balance" : "1000000000000000000",
-//                "nonce" : 0,
-//                "code" : "{ [[ 0 ]] (SHA3  100 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)}",
-//                "storage": {}
-//            }
-//        },
-//        "exec" : {
-//            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
-//            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-//            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
-//            "value" : "1000000000000000000",
-//            "data" : "",
-//            "gasPrice" : "100000000000000",
-//            "gas" : "10000"
-//        }
-//    }
+    }
 }