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Fixing sub w/ SET_CARRY.

This commit is contained in:
Ben Vanik 2014-01-31 23:16:38 -08:00
parent efb2b6f037
commit e63fbcc2cd
1 changed files with 18 additions and 2 deletions
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16
src/alloy/backend/x64/lowering/lowering_sequences.cc
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@ -1809,9 +1809,25 @@ table->AddSequence(OPCODE_VECTOR_ADD, [](X64Emitter& e, Instr*& i) {
table->AddSequence(OPCODE_SUB, [](X64Emitter& e, Instr*& i) {
if (IsIntType(i->dest->type)) {
IntBinaryOp(e, i, [](X64Emitter& e, Instr& i, const Reg& dest_src, const Operand& src) {
if (i.flags & ARITHMETIC_SET_CARRY) {
auto Nax = LIKE_REG(e.rax, src);
e.mov(Nax, src);
e.not(Nax);
e.stc();
e.adc(dest_src, Nax);
} else {
e.sub(dest_src, src);
}
}, [](X64Emitter& e, Instr& i, const Reg& dest_src, uint32_t src) {
if (i.flags & ARITHMETIC_SET_CARRY) {
auto Nax = LIKE_REG(e.rax, dest_src);
e.mov(Nax, src);
e.not(Nax);
e.stc();
e.adc(dest_src, Nax);
} else {
e.sub(dest_src, src);
}
});
} else if (IsFloatType(i->dest->type)) {
XmmBinaryOp(e, i, i->flags, [](X64Emitter& e, Instr& i, const Xmm& dest_src, const Xmm& src) {