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Fixing const propagated DID_CARRY.

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This commit is contained in:
Ben Vanik
2014-05-30 20:09:00 -07:00
parent d65b5801f8
commit 0b42c72ec5
5 changed files with 74 additions and 10 deletions
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11
src/alloy/backend/x64/x64_sequences.cc
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@@ -2329,24 +2329,28 @@ EMITTER_ASSOCIATIVE_COMPARE_FLT_XX(UGE, setae);
// https://code.google.com/p/corkami/wiki/x86oddities
EMITTER(DID_CARRY_I8, MATCH(I<OPCODE_DID_CARRY, I8<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
XEASSERT(!i.src1.is_constant);
e.LoadEflags();
e.setc(i.dest);
}
};
EMITTER(DID_CARRY_I16, MATCH(I<OPCODE_DID_CARRY, I8<>, I16<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
XEASSERT(!i.src1.is_constant);
e.LoadEflags();
e.setc(i.dest);
}
};
EMITTER(DID_CARRY_I32, MATCH(I<OPCODE_DID_CARRY, I8<>, I32<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
XEASSERT(!i.src1.is_constant);
e.LoadEflags();
e.setc(i.dest);
}
};
EMITTER(DID_CARRY_I64, MATCH(I<OPCODE_DID_CARRY, I8<>, I64<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
XEASSERT(!i.src1.is_constant);
e.LoadEflags();
e.setc(i.dest);
}
@@ -4414,8 +4418,8 @@ EMITTER(EXTRACT_I8, MATCH(I<OPCODE_EXTRACT, I8<>, V128<>, I8<>>)) {
} else {
XEASSERTALWAYS();
// TODO(benvanik): try out hlide's version:
// mov eax, 0x80808080
// mov al, i.src2
// mov eax, 0x80808003
// xor al, i.src2.cvt8()
// vmovd xmm0, eax
// vpshufb xmm0, i.src1, xmm0
// vmovd i.dest.reg().cvt32(), xmm0
@@ -4430,6 +4434,7 @@ EMITTER(EXTRACT_I16, MATCH(I<OPCODE_EXTRACT, I16<>, V128<>, I8<>>)) {
// TODO(benvanik): try out hlide's version:
// xor eax, eax
// mov al, i.src2 // eax = [i, 0, 0, 0]
// xor eax, 0x80800203
// imul eax, eax, 0x00000202 // [i*2, i*2, 0, 0] supposedly that 0<= i < 8
// add eax,0x80800100 // [i*2+0b00, i*2+0b01, 0x80, 0x80]
// vmovd xmm0, eax
@@ -4454,7 +4459,7 @@ EMITTER(EXTRACT_I32, MATCH(I<OPCODE_EXTRACT, I32<>, V128<>, I8<>>)) {
// xor eax, eax
// mov al, i.src2 // eax = [i, 0, 0, 0]
// imul eax, eax, 0x04040404 // [i*4, i*4, i*4, i*4] supposedly that 0<= i < 4
// add eax,0x03020100 // [i*4+0b00, i*4+0b01, i*4+0b10, i*4+0b11]
// xor/add eax, 0x00010203 // [i*4+0b00, i*4+0b01, i*4+0b10, i*4+0b11]
// vmovd xmm0, eax
// vpshufb xmm0, i.src1, xmm0
// vmovd i.dest.reg().cvt32(), xmm0