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Merge pull request #1285 from ethereum/lll-simplify-not

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LLL: use NOT for ~
This commit is contained in:
chriseth 2016-10-26 14:55:14 +02:00 committed by GitHub
commit f9946ec029
1 changed files with 26 additions and 14 deletions
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40
liblll/CodeFragment.cpp
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@ -330,9 +330,32 @@ void CodeFragment::constructOperation(sp::utree const& _t, CompilerState& _s)
if (nonStandard)
return;
std::map<std::string, Instruction> const c_arith = { { "+", Instruction::ADD }, { "-", Instruction::SUB }, { "*", Instruction::MUL }, { "/", Instruction::DIV }, { "%", Instruction::MOD }, { "&", Instruction::AND }, { "|", Instruction::OR }, { "^", Instruction::XOR } };
std::map<std::string, pair<Instruction, bool>> const c_binary = { { "<", { Instruction::LT, false } }, { "<=", { Instruction::GT, true } }, { ">", { Instruction::GT, false } }, { ">=", { Instruction::LT, true } }, { "S<", { Instruction::SLT, false } }, { "S<=", { Instruction::SGT, true } }, { "S>", { Instruction::SGT, false } }, { "S>=", { Instruction::SLT, true } }, { "=", { Instruction::EQ, false } }, { "!=", { Instruction::EQ, true } } };
std::map<std::string, Instruction> const c_unary = { { "!", Instruction::ISZERO } };
std::map<std::string, Instruction> const c_arith = {
{ "+", Instruction::ADD },
{ "-", Instruction::SUB },
{ "*", Instruction::MUL },
{ "/", Instruction::DIV },
{ "%", Instruction::MOD },
{ "&", Instruction::AND },
{ "|", Instruction::OR },
{ "^", Instruction::XOR }
};
std::map<std::string, pair<Instruction, bool>> const c_binary = {
{ "<", { Instruction::LT, false } },
{ "<=", { Instruction::GT, true } },
{ ">", { Instruction::GT, false } },
{ ">=", { Instruction::LT, true } },
{ "S<", { Instruction::SLT, false } },
{ "S<=", { Instruction::SGT, true } },
{ "S>", { Instruction::SGT, false } },
{ "S>=", { Instruction::SLT, true } },
{ "=", { Instruction::EQ, false } },
{ "!=", { Instruction::EQ, true } }
};
std::map<std::string, Instruction> const c_unary = {
{ "!", Instruction::ISZERO },
{ "~", Instruction::NOT }
};
vector<CodeFragment> code;
CompilerState ns = _s;
@ -541,17 +564,6 @@ void CodeFragment::constructOperation(sp::utree const& _t, CompilerState& _s)
// At end now.
m_asm.append(end);
}
else if (us == "~")
{
requireSize(1);
requireDeposit(0, 1);
m_asm.append(code[0].m_asm, 1);
m_asm.append((u256)1);
m_asm.append((u256)0);
m_asm.append(Instruction::SUB);
m_asm.append(Instruction::SUB);
}
else if (us == "SEQ")
{
unsigned ii = 0;