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authorJeffrey Wilcke <jeffrey@ethereum.org>2017-05-23 16:52:11 +0800
committerJeffrey Wilcke <jeffrey@ethereum.org>2017-05-23 16:52:11 +0800
commit10582a97ca3d147b29e1ca1c4069ce785a3ebde7 (patch)
treea50c4943156e71175048f3b64ea7b787a720adb7 /core
parente16a7ef60ff1dedc3fe8f16e932466dc057787f7 (diff)
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core/vm: expose intpool to stack dup method
Improve the duplication method of the stack to reuse big ints by passing in an existing integer pool.
Diffstat (limited to 'core')
-rw-r--r--core/vm/instructions.go2
-rw-r--r--core/vm/stack.go4
2 files changed, 3 insertions, 3 deletions
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index c0ac911ac..42f1781d8 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -731,7 +731,7 @@ func makePush(size uint64, pushByteSize int) executionFunc {
// make push instruction function
func makeDup(size int64) executionFunc {
return func(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
- stack.dup(int(size))
+ stack.dup(evm.interpreter.intPool, int(size))
return nil, nil
}
}
diff --git a/core/vm/stack.go b/core/vm/stack.go
index 2d1b7bb82..f4777c5b3 100644
--- a/core/vm/stack.go
+++ b/core/vm/stack.go
@@ -60,8 +60,8 @@ func (st *Stack) swap(n int) {
st.data[st.len()-n], st.data[st.len()-1] = st.data[st.len()-1], st.data[st.len()-n]
}
-func (st *Stack) dup(n int) {
- st.push(new(big.Int).Set(st.data[st.len()-n]))
+func (st *Stack) dup(pool *intPool, n int) {
+ st.push(pool.get().Set(st.data[st.len()-n]))
}
func (st *Stack) peek() *big.Int {