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ir: Add opcodes for signed absolute differences

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Lioncash
2018-05-08 15:39:37 -04:00
committed by MerryMage
parent d3b44c1b5a
commit 1e10017f4b
4 changed files with 66 additions and 0 deletions
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49
src/backend_x64/emit_x64_vector.cpp
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@@ -1875,6 +1875,55 @@ void EmitX64::EmitVectorSignExtend64(EmitContext& ctx, IR::Inst* inst) {
});
}
static void EmitVectorSignedAbsoluteDifference(size_t esize, EmitContext& ctx, IR::Inst* inst, BlockOfCode& code) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm x = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm y = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm mask = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm tmp1 = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm tmp2 = ctx.reg_alloc.ScratchXmm();
code.movdqa(mask, x);
code.movdqa(tmp1, y);
switch (esize) {
case 8:
code.pcmpgtb(mask, y);
code.psubb(tmp1, x);
code.psubb(x, y);
break;
case 16:
code.pcmpgtw(mask, y);
code.psubw(tmp1, x);
code.psubw(x, y);
break;
case 32:
code.pcmpgtd(mask, y);
code.psubd(tmp1, x);
code.psubd(x, y);
break;
}
code.movdqa(tmp2, mask);
code.pand(x, mask);
code.pandn(tmp2, tmp1);
code.por(x, tmp2);
ctx.reg_alloc.DefineValue(inst, x);
}
void EmitX64::EmitVectorSignedAbsoluteDifference8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorSignedAbsoluteDifference(8, ctx, inst, code);
}
void EmitX64::EmitVectorSignedAbsoluteDifference16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorSignedAbsoluteDifference(16, ctx, inst, code);
}
void EmitX64::EmitVectorSignedAbsoluteDifference32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorSignedAbsoluteDifference(32, ctx, inst, code);
}
void EmitX64::EmitVectorSub8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorOperation(code, ctx, inst, &Xbyak::CodeGenerator::psubb);
}