suyu/dynarmic
28
1
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity

emit_x64_vector_floating_point: RSqrtEstimate: Add AVX implementation

Browse source
This commit is contained in:
Merry 2023-08-28 14:13:59 +01:00
parent adac93f12e
commit 29dde29560
1 changed files with 44 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
src/dynarmic/backend/x64/emit_x64_vector_floating_point.cpp
View file

@ -1795,6 +1795,50 @@ static void EmitRSqrtEstimate(BlockOfCode& code, EmitContext& ctx, IR::Inst* ins
ctx.reg_alloc.DefineValue(inst, result);
return;
}
if (code.HasHostFeature(HostFeature::AVX)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const bool fpcr_controlled = args[1].GetImmediateU1();
const Xbyak::Xmm operand = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm value = ctx.reg_alloc.ScratchXmm();
SharedLabel bad_values = GenSharedLabel(), end = GenSharedLabel();
code.movaps(value, operand);
code.movaps(xmm0, GetVectorOf<fsize, (fsize == 32 ? 0xFFFF8000 : 0xFFFF'F000'0000'0000)>(code));
code.pand(value, xmm0);
code.por(value, GetVectorOf<fsize, (fsize == 32 ? 0x00008000 : 0x0000'1000'0000'0000)>(code));
// Detect NaNs, negatives, zeros, denormals and infinities
FCODE(vcmpnge_uqp)(result, value, GetVectorOf<fsize, (FPT(1) << FP::FPInfo<FPT>::explicit_mantissa_width)>(code));
code.vptest(result, result);
code.jnz(*bad_values, code.T_NEAR);
FCODE(sqrtp)(value, value);
code.vmovaps(result, GetVectorOf<fsize, FP::FPValue<FPT, false, 0, 1>()>(code));
FCODE(divp)(result, value);
ICODE(padd)(result, GetVectorOf<fsize, (fsize == 32 ? 0x00004000 : 0x0000'0800'0000'0000)>(code));
code.pand(result, xmm0);
code.L(*end);
ctx.deferred_emits.emplace_back([=, &code, &ctx] {
code.L(*bad_values);
code.sub(rsp, 8);
ABI_PushCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
EmitTwoOpFallbackWithoutRegAlloc(code, ctx, result, operand, fallback_fn, fpcr_controlled);
ABI_PopCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.add(rsp, 8);
code.jmp(*end, code.T_NEAR);
});
ctx.reg_alloc.DefineValue(inst, result);
return;
}
}
EmitTwoOpFallback(code, ctx, inst, fallback_fn);