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ir: Add opcodes for signed saturated doubling multiplies

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This commit is contained in:
Lioncash
2018-08-22 13:09:22 -04:00
committed by MerryMage
parent a1e46e9881
commit a0231e5546
5 changed files with 629 additions and 539 deletions
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74
src/backend/x64/emit_x64_vector.cpp
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@@ -2757,6 +2757,80 @@ void EmitX64::EmitVectorSignedSaturatedAbs64(EmitContext& ctx, IR::Inst* inst) {
});
}
void EmitX64::EmitVectorSignedSaturatedDoublingMultiplyReturnHigh16(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm x = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm y = ctx.reg_alloc.UseScratchXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp, x);
code.pmulhw(tmp, y);
code.paddw(tmp, tmp);
code.pmullw(y, x);
code.psrlw(y, 15);
code.por(y, tmp);
code.movdqa(x, code.MConst(xword, 0x8000800080008000, 0x8000800080008000));
code.pcmpeqw(x, y);
code.movdqa(tmp, x);
code.pxor(x, y);
// Check if any saturation occurred (i.e. if any halfwords in x were
// 0x8000 before saturating
const Xbyak::Reg64 mask = ctx.reg_alloc.ScratchGpr();
code.pmovmskb(mask, tmp);
code.test(mask.cvt32(), 0b1010'1010'1010'1010);
code.setnz(mask.cvt8());
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], mask.cvt8());
ctx.reg_alloc.DefineValue(inst, x);
}
void EmitX64::EmitVectorSignedSaturatedDoublingMultiplyReturnHigh32(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm x = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm y = ctx.reg_alloc.UseScratchXmm(args[1]);
const Xbyak::Xmm tmp1 = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm tmp2 = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp1, x);
code.punpckldq(tmp1, y);
code.movdqa(tmp2, y);
code.punpckldq(tmp2, x);
code.pmuldq(tmp2, tmp1);
code.paddq(tmp2, tmp2);
code.movdqa(tmp1, x);
code.punpckhdq(tmp1, y);
code.punpckhdq(y, x);
code.pmuldq(y, tmp1);
code.paddq(y, y);
code.pshufd(tmp1, tmp2, 0b11101101);
code.pshufd(x, y, 0b11101101);
code.punpcklqdq(tmp1, x);
code.movdqa(x, code.MConst(xword, 0x8000000080000000, 0x8000000080000000));
code.pcmpeqd(x, tmp1);
code.movdqa(tmp2, x);
code.pxor(x, tmp1);
// Check if any saturation occurred (i.e. if any words in x were
// 0x80000000 before saturating
const Xbyak::Reg64 mask = ctx.reg_alloc.ScratchGpr();
code.pmovmskb(mask, tmp2);
code.test(mask.cvt32(), 0b1000'1000'1000'1000);
code.setnz(mask.cvt8());
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], mask.cvt8());
ctx.reg_alloc.DefineValue(inst, x);
}
static void EmitVectorSignedSaturatedNarrowToSigned(size_t original_esize, BlockOfCode& code, EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm src = ctx.reg_alloc.UseXmm(args[0]);