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emit_x64_vector_saturation: AVX512 implementation of VectorUnsignedSaturated{Add,Sub}{32,64}

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Wunkolo 2021-05-22 11:38:07 -07:00 committed by Merry
parent fa8cc1ac36
commit 332c26d432
1 changed files with 107 additions and 39 deletions
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146
src/dynarmic/backend/x64/emit_x64_vector_saturation.cpp
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@ -179,30 +179,45 @@ void EmitX64::EmitVectorUnsignedSaturatedAdd32(EmitContext& ctx, IR::Inst* inst)
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm addend = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
// TODO AVX2, AVX-512: vpternlog
// TODO AVX2
if (code.HasHostFeature(HostFeature::AVX512_Ortho | HostFeature::AVX512DQ)) {
// Do a regular unsigned addition
code.vpaddd(result, result, addend);
code.movaps(tmp, result);
code.movaps(xmm0, result);
// Test if an overflow happened
code.vpcmpud(k1, result, addend, CmpInt::LessThan);
code.pxor(xmm0, addend);
code.pand(tmp, addend);
code.paddd(result, addend);
// Write 0b1111... where overflows have happened
// This is just a quick way to do this without touching memory
code.vpternlogd(result | k1, result, result, 0xFF);
code.psrld(xmm0, 1);
code.paddd(tmp, xmm0);
code.psrad(tmp, 31);
code.por(result, tmp);
if (code.HasHostFeature(HostFeature::SSE41)) {
code.ptest(tmp, tmp);
// Set ZF if an overflow happened
code.ktestb(k1, k1);
} else {
code.movmskps(overflow.cvt32(), tmp);
code.test(overflow.cvt32(), overflow.cvt32());
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movaps(tmp, result);
code.movaps(xmm0, result);
code.pxor(xmm0, addend);
code.pand(tmp, addend);
code.paddd(result, addend);
code.psrld(xmm0, 1);
code.paddd(tmp, xmm0);
code.psrad(tmp, 31);
code.por(result, tmp);
if (code.HasHostFeature(HostFeature::SSE41)) {
code.ptest(tmp, tmp);
} else {
code.movmskps(overflow.cvt32(), tmp);
code.test(overflow.cvt32(), overflow.cvt32());
}
}
code.setnz(overflow);
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], overflow);
@ -214,31 +229,46 @@ void EmitX64::EmitVectorUnsignedSaturatedAdd64(EmitContext& ctx, IR::Inst* inst)
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm addend = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
// TODO AVX2, AVX-512: vpternlog
// TODO AVX2
if (code.HasHostFeature(HostFeature::AVX512_Ortho | HostFeature::AVX512DQ)) {
// Do a regular unsigned addition
code.vpaddq(result, result, addend);
code.movaps(tmp, result);
code.movaps(xmm0, result);
// Test if an overflow happened
code.vpcmpuq(k1, result, addend, CmpInt::LessThan);
code.pxor(xmm0, addend);
code.pand(tmp, addend);
code.paddq(result, addend);
// Write 0b1111... where overflows have happened
// This is just a quick way to do this without touching memory
code.vpternlogq(result | k1, result, result, 0xFF);
code.psrlq(xmm0, 1);
code.paddq(tmp, xmm0);
code.psrad(tmp, 31);
code.pshufd(tmp, tmp, 0b11110101);
code.por(result, tmp);
if (code.HasHostFeature(HostFeature::SSE41)) {
code.ptest(tmp, tmp);
// Set ZF if an overflow happened
code.ktestb(k1, k1);
} else {
code.movmskpd(overflow.cvt32(), tmp);
code.test(overflow.cvt32(), overflow.cvt32());
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movaps(tmp, result);
code.movaps(xmm0, result);
code.pxor(xmm0, addend);
code.pand(tmp, addend);
code.paddq(result, addend);
code.psrlq(xmm0, 1);
code.paddq(tmp, xmm0);
code.psrad(tmp, 31);
code.pshufd(tmp, tmp, 0b11110101);
code.por(result, tmp);
if (code.HasHostFeature(HostFeature::SSE41)) {
code.ptest(tmp, tmp);
} else {
code.movmskpd(overflow.cvt32(), tmp);
code.test(overflow.cvt32(), overflow.cvt32());
}
}
code.setnz(overflow);
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], overflow);
@ -261,9 +291,28 @@ void EmitX64::EmitVectorUnsignedSaturatedSub32(EmitContext& ctx, IR::Inst* inst)
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
// TODO AVX2, AVX-512: vpternlog
code.movaps(tmp, result);
// TODO AVX2
if (code.HasHostFeature(HostFeature::AVX512_Ortho | HostFeature::AVX512DQ)) {
// Do a regular unsigned subtraction
code.vpsubd(result, result, subtrahend);
// Test if an underflow happened
code.vpcmpud(k1, result, tmp, CmpInt::GreaterThan);
// Write 0 where underflows have happened
code.vpxord(result | k1, result, result);
// Set ZF if an underflow happened
code.ktestb(k1, k1);
code.setnz(overflow);
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], overflow);
ctx.reg_alloc.DefineValue(inst, result);
return;
}
code.movaps(xmm0, subtrahend);
code.pxor(tmp, subtrahend);
@ -295,9 +344,28 @@ void EmitX64::EmitVectorUnsignedSaturatedSub64(EmitContext& ctx, IR::Inst* inst)
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
// TODO AVX2, AVX-512: vpternlog
code.movaps(tmp, result);
// TODO AVX2
if (code.HasHostFeature(HostFeature::AVX512_Ortho | HostFeature::AVX512DQ)) {
// Do a regular unsigned subtraction
code.vpsubq(result, result, subtrahend);
// Test if an underflow happened
code.vpcmpuq(k1, result, tmp, CmpInt::GreaterThan);
// Write 0 where underflows have happened
code.vpxorq(result | k1, result, result);
// Set ZF if an underflow happened
code.ktestb(k1, k1);
code.setnz(overflow);
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], overflow);
ctx.reg_alloc.DefineValue(inst, result);
return;
}
code.movaps(xmm0, subtrahend);
code.pxor(tmp, subtrahend);