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emit_x64_vector_floating_point: AVX implementation for EmitFPVectorMinMaxNumeric

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merry 2022-12-29 19:31:54 +00:00
parent 0869c26b4f
commit 2492970039
1 changed files with 74 additions and 0 deletions
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src/dynarmic/backend/x64/emit_x64_vector_floating_point.cpp
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@ -1081,6 +1081,80 @@ static void EmitFPVectorMinMaxNumeric(BlockOfCode& code, EmitContext& ctx, IR::I
// !NaN QNaN op1
// QNaN QNaN op1
if (code.HasHostFeature(HostFeature::AVX)) {
MaybeStandardFPSCRValue(code, ctx, fpcr_controlled, [&] {
using FPT = mcl::unsigned_integer_of_size<fsize>;
// result = xmm_a == SNaN || xmm_b == QNaN
{
// evaluate xmm_b == QNaN
FCODE(vcmpunordp)(tmp1, xmm_b, xmm_b);
ICODE(vpsll)(tmp2, xmm_b, static_cast<u8>(fsize - FP::FPInfo<FPT>::explicit_mantissa_width));
{
code.vpsrad(tmp2, tmp2, 31);
if constexpr (fsize == 64) {
code.vpshufd(tmp2, tmp2, 0b11110101);
}
}
code.vandps(result, tmp1, tmp2);
// evaluate xmm_a == SNaN
FCODE(vcmpunordp)(tmp1, xmm_a, xmm_a);
ICODE(vpsll)(tmp2, xmm_a, static_cast<u8>(fsize - FP::FPInfo<FPT>::explicit_mantissa_width));
{
code.vpsrad(tmp2, tmp2, 31);
if constexpr (fsize == 64) {
code.vpshufd(tmp2, tmp2, 0b11110101);
}
}
code.vandnps(tmp2, tmp2, tmp1);
code.vorps(result, tmp2);
}
// Denormalization quiets SNaNs, therefore should happen after SNaN detection!
DenormalsAreZero<fsize>(code, ctx.FPCR(fpcr_controlled), {xmm_a, xmm_b}, tmp1);
// intermediate result = max/min(xmm_a, xmm_b)
{
const Xbyak::Xmm eq_mask = tmp1;
const Xbyak::Xmm eq = tmp2;
FCODE(vcmpeqp)(eq_mask, xmm_a, xmm_b);
if constexpr (is_max) {
code.vandps(eq, xmm_a, xmm_b);
FCODE(vmaxp)(intermediate_result, xmm_a, xmm_b);
} else {
code.vorps(eq, xmm_a, xmm_b);
FCODE(vminp)(intermediate_result, xmm_a, xmm_b);
}
code.blendvps(intermediate_result, eq); // eq_mask is in xmm0
}
{
code.vblendvps(result, intermediate_result, xmm_a, result);
}
if (ctx.FPCR(fpcr_controlled).DN()) {
const Xbyak::Xmm ord_mask = tmp1;
FCODE(vcmpunordp)(ord_mask, result, result);
code.blendvps(result, GetNaNVector<fsize>(code)); // ord_mask is in xmm0
} else {
const Xbyak::Xmm nan_mask = tmp1;
FCODE(vcmpunordp)(nan_mask, result, result);
code.vandps(nan_mask, nan_mask, GetVectorOf<fsize, FP::FPInfo<FPT>::mantissa_msb>(code));
code.vorps(result, result, nan_mask);
}
});
ctx.reg_alloc.DefineValue(inst, result);
return;
}
MaybeStandardFPSCRValue(code, ctx, fpcr_controlled, [&] {
using FPT = mcl::unsigned_integer_of_size<fsize>;