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ir: Add opcodes for performing vector absolute values

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This commit is contained in:
Lioncash
2018-04-02 16:27:04 -04:00
committed by MerryMage
parent 84d49309b9
commit e33dcce14a
4 changed files with 86 additions and 0 deletions
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66
src/backend_x64/emit_x64_vector.cpp
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@@ -254,6 +254,72 @@ void EmitX64::EmitVectorSetElement64(EmitContext& ctx, IR::Inst* inst) {
}
}
static void EmitVectorAbs(size_t esize, EmitContext& ctx, IR::Inst* inst, BlockOfCode& code) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm data = ctx.reg_alloc.UseScratchXmm(args[0]);
switch (esize) {
case 8:
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSSE3)) {
code.pabsb(data, data);
} else {
const Xbyak::Xmm temp = ctx.reg_alloc.ScratchXmm();
code.pxor(temp, temp);
code.psubb(temp, data);
code.pminub(data, temp);
}
break;
case 16:
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSSE3)) {
code.pabsw(data, data);
} else {
const Xbyak::Xmm temp = ctx.reg_alloc.ScratchXmm();
code.pxor(temp, temp);
code.psubw(temp, data);
code.pmaxsw(data, temp);
}
break;
case 32:
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSSE3)) {
code.pabsd(data, data);
} else {
const Xbyak::Xmm temp = ctx.reg_alloc.ScratchXmm();
code.movdqa(temp, data);
code.psrad(temp, 31);
code.pxor(data, temp);
code.psubd(data, temp);
}
break;
case 64: {
const Xbyak::Xmm temp = ctx.reg_alloc.ScratchXmm();
code.pshufd(temp, data, 0b11110101);
code.psrad(temp, 31);
code.pxor(data, temp);
code.psubq(data, temp);
break;
}
}
ctx.reg_alloc.DefineValue(inst, data);
}
void EmitX64::EmitVectorAbs8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorAbs(8, ctx, inst, code);
}
void EmitX64::EmitVectorAbs16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorAbs(16, ctx, inst, code);
}
void EmitX64::EmitVectorAbs32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorAbs(32, ctx, inst, code);
}
void EmitX64::EmitVectorAbs64(EmitContext& ctx, IR::Inst* inst) {
EmitVectorAbs(64, ctx, inst, code);
}
void EmitX64::EmitVectorAdd8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorOperation(code, ctx, inst, &Xbyak::CodeGenerator::paddb);
}