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Implement VCMP

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This commit is contained in:
MerryMage 2016-11-26 11:17:16 +00:00
parent f2fe376fc6
commit e166965f3e
9 changed files with 131 additions and 2 deletions
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64
src/backend_x64/emit_x64.cpp
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@ -1762,6 +1762,70 @@ void EmitX64::EmitFPSub64(IR::Block& block, IR::Inst* inst) {
FPThreeOp64(code, reg_alloc, block, inst, &Xbyak::CodeGenerator::subsd);
}
static void SetFpscrNzcvFromLahf(JitState* jit_state, u8 lahf) {
switch (lahf) {
case 0b01000111:
jit_state->FPSCR_nzcv = 0x30000000;
return;
case 0b00000010:
jit_state->FPSCR_nzcv = 0x20000000;
return;
case 0b00000011:
jit_state->FPSCR_nzcv = 0x80000000;
return;
case 0b01000010:
jit_state->FPSCR_nzcv = 0x60000000;
return;
}
ASSERT_MSG(false, "<internal error>");
}
void EmitX64::EmitFPCompare32(IR::Block& block, IR::Inst* inst) {
IR::Value a = inst->GetArg(0);
IR::Value b = inst->GetArg(1);
bool quiet = inst->GetArg(2).GetU1();
Xbyak::Xmm reg_a = reg_alloc.UseXmm(a);
Xbyak::Xmm reg_b = reg_alloc.UseXmm(b);
if (quiet) {
code->ucomiss(reg_a, reg_b);
} else {
code->comiss(reg_a, reg_b);
}
reg_alloc.EndOfAllocScope();
reg_alloc.HostCall();
code->lahf();
code->mov(code->ABI_PARAM1, code->r15);
code->mov(code->ABI_PARAM2.cvt8(), code->ah);
code->CallFunction(&SetFpscrNzcvFromLahf);
}
void EmitX64::EmitFPCompare64(IR::Block& block, IR::Inst* inst) {
IR::Value a = inst->GetArg(0);
IR::Value b = inst->GetArg(1);
bool quiet = inst->GetArg(2).GetU1();
Xbyak::Xmm reg_a = reg_alloc.UseXmm(a);
Xbyak::Xmm reg_b = reg_alloc.UseXmm(b);
if (quiet) {
code->ucomisd(reg_a, reg_b);
} else {
code->comisd(reg_a, reg_b);
}
reg_alloc.EndOfAllocScope();
reg_alloc.HostCall();
code->lahf();
code->mov(code->ABI_PARAM1, code->r15);
code->mov(code->ABI_PARAM2.cvt8(), code->ah);
code->CallFunction(&SetFpscrNzcvFromLahf);
}
void EmitX64::EmitFPSingleToDouble(IR::Block& block, IR::Inst* inst) {
IR::Value a = inst->GetArg(0);