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| author | chriseth <c@ethdev.com> | 2016-05-08 21:22:54 +0800 |
|---|---|---|
| committer | chriseth <c@ethdev.com> | 2016-05-09 16:52:23 +0800 |
| commit | a927efb1513e31cfa9130458b4ea40d89e283b17 (patch) | |
| tree | cdf13fa91e02ebd9d0454b47f8f07fdf4eb877b0 /docs/control-structures.rst | |
| parent | 9e36bdda8a9552f1885e0a63a85db588623b39b2 (diff) | |
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Correctly use not/bnot/iszero.
A long time ago, some opcodes were renamed. Now we should only have
not (bitwise negation) and iszero (logical negation).
Diffstat (limited to 'docs/control-structures.rst')
| -rw-r--r-- | docs/control-structures.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/docs/control-structures.rst b/docs/control-structures.rst index 2d959d1d..fbe7715c 100644 --- a/docs/control-structures.rst +++ b/docs/control-structures.rst @@ -208,7 +208,7 @@ idea is that assembly libraries will be used to enhance the language in such way // by using o_code = new bytes(size) o_code := mload(0x40) // new "memory end" including padding - mstore(0x40, add(o_code, and(add(add(size, 0x20), 0x1f), bnot(0x1f)))) + mstore(0x40, add(o_code, and(add(add(size, 0x20), 0x1f), not(0x1f)))) // store length in memory mstore(o_code, size) // actually retrieve the code, this needs assembly @@ -292,7 +292,7 @@ The opcodes `pushi` and `jumpdest` cannot be used directly. +-----------------------+------+---------------------------------------------------------------+ | exp(x, y) | | x to the power of y | +-----------------------+------+---------------------------------------------------------------+ -| bnot(x) | | ~x, every bit of x is negated | +| not(x) | | ~x, every bit of x is negated | +-----------------------+------+---------------------------------------------------------------+ | lt(x, y) | | 1 if x < y, 0 otherwise | +-----------------------+------+---------------------------------------------------------------+ @@ -304,7 +304,7 @@ The opcodes `pushi` and `jumpdest` cannot be used directly. +-----------------------+------+---------------------------------------------------------------+ | eq(x, y) | | 1 if x == y, 0 otherwise | +-----------------------+------+---------------------------------------------------------------+ -| not(x) | | 1 if x == 0, 0 otherwise | +| iszero(x) | | 1 if x == 0, 0 otherwise | +-----------------------+------+---------------------------------------------------------------+ | and(x, y) | | bitwise and of x and y | +-----------------------+------+---------------------------------------------------------------+ |