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Improve accuracy of reciprocal step instructions (#2305)

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* Improve accuracy of reciprocal step instructions

* Fix small mistake on RECPE rounding, nits, PTC version bump
This commit is contained in:
gdkchan 2021-05-24 07:20:07 -03:00 committed by GitHub
parent 3fd6b55f04
commit fb65f392d1
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 96 additions and 27 deletions
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121
ARMeilleure/Instructions/InstEmitSimdArithmetic.cs
View File

@ -1477,7 +1477,7 @@ namespace ARMeilleure.Instructions
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rcpss, GetVec(op.Rn)), scalar: true);
Operand res = EmitSse41Round32Exp8OpF(context, context.AddIntrinsic(Intrinsic.X86Rcpss, GetVec(op.Rn)), scalar: true);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
@ -1498,7 +1498,7 @@ namespace ARMeilleure.Instructions
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rcpps, GetVec(op.Rn)), scalar: false);
Operand res = EmitSse41Round32Exp8OpF(context, context.AddIntrinsic(Intrinsic.X86Rcpps, GetVec(op.Rn)), scalar: false);
if (op.RegisterSize == RegisterSize.Simd64)
{
@ -1518,19 +1518,23 @@ namespace ARMeilleure.Instructions
public static void Frecps_S(ArmEmitterContext context) // Fused.
{
if (Optimizations.FastFP && Optimizations.UseSse2)
if (Optimizations.FastFP && Optimizations.UseSse41)
{
OpCodeSimdReg op = (OpCodeSimdReg)context.CurrOp;
Operand n = GetVec(op.Rn);
Operand m = GetVec(op.Rm);
int sizeF = op.Size & 1;
if (sizeF == 0)
{
Operand mask = X86GetScalar(context, 2f);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulss, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulss, n, m);
res = context.AddIntrinsic(Intrinsic.X86Subss, mask, res);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, mask, scalar: true, sizeF);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
@ -1538,9 +1542,10 @@ namespace ARMeilleure.Instructions
{
Operand mask = X86GetScalar(context, 2d);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulsd, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulsd, n, m);
res = context.AddIntrinsic(Intrinsic.X86Subsd, mask, res);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, mask, scalar: true, sizeF);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper64(res));
}
@ -1556,17 +1561,21 @@ namespace ARMeilleure.Instructions
public static void Frecps_V(ArmEmitterContext context) // Fused.
{
if (Optimizations.FastFP && Optimizations.UseSse2)
if (Optimizations.FastFP && Optimizations.UseSse41)
{
OpCodeSimdReg op = (OpCodeSimdReg)context.CurrOp;
Operand n = GetVec(op.Rn);
Operand m = GetVec(op.Rm);
int sizeF = op.Size & 1;
if (sizeF == 0)
{
Operand mask = X86GetAllElements(context, 2f);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulps, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulps, n, m);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, mask, scalar: false, sizeF);
res = context.AddIntrinsic(Intrinsic.X86Subps, mask, res);
@ -1581,7 +1590,8 @@ namespace ARMeilleure.Instructions
{
Operand mask = X86GetAllElements(context, 2d);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulpd, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulpd, n, m);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, mask, scalar: false, sizeF);
res = context.AddIntrinsic(Intrinsic.X86Subpd, mask, res);
@ -1821,7 +1831,7 @@ namespace ARMeilleure.Instructions
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rsqrtss, GetVec(op.Rn)), scalar: true);
Operand res = EmitSse41Round32Exp8OpF(context, context.AddIntrinsic(Intrinsic.X86Rsqrtss, GetVec(op.Rn)), scalar: true);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
@ -1842,7 +1852,7 @@ namespace ARMeilleure.Instructions
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rsqrtps, GetVec(op.Rn)), scalar: false);
Operand res = EmitSse41Round32Exp8OpF(context, context.AddIntrinsic(Intrinsic.X86Rsqrtps, GetVec(op.Rn)), scalar: false);
if (op.RegisterSize == RegisterSize.Simd64)
{
@ -1862,33 +1872,40 @@ namespace ARMeilleure.Instructions
public static void Frsqrts_S(ArmEmitterContext context) // Fused.
{
if (Optimizations.FastFP && Optimizations.UseSse2)
if (Optimizations.FastFP && Optimizations.UseSse41)
{
OpCodeSimdReg op = (OpCodeSimdReg)context.CurrOp;
Operand n = GetVec(op.Rn);
Operand m = GetVec(op.Rm);
int sizeF = op.Size & 1;
if (sizeF == 0)
{
Operand maskHalf = X86GetScalar(context, 0.5f);
Operand maskThree = X86GetScalar(context, 3f);
Operand maskHalf = X86GetScalar(context, 0.5f);
Operand maskThree = X86GetScalar(context, 3f);
Operand maskOneHalf = X86GetScalar(context, 1.5f);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulss, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulss, n, m);
res = context.AddIntrinsic(Intrinsic.X86Subss, maskThree, res);
res = context.AddIntrinsic(Intrinsic.X86Mulss, maskHalf, res);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, maskOneHalf, scalar: true, sizeF);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
else /* if (sizeF == 1) */
{
Operand maskHalf = X86GetScalar(context, 0.5d);
Operand maskThree = X86GetScalar(context, 3d);
Operand maskHalf = X86GetScalar(context, 0.5d);
Operand maskThree = X86GetScalar(context, 3d);
Operand maskOneHalf = X86GetScalar(context, 1.5d);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulsd, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulsd, n, m);
res = context.AddIntrinsic(Intrinsic.X86Subsd, maskThree, res);
res = context.AddIntrinsic(Intrinsic.X86Mulsd, maskHalf, res);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, maskOneHalf, scalar: true, sizeF);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper64(res));
}
@ -1904,21 +1921,26 @@ namespace ARMeilleure.Instructions
public static void Frsqrts_V(ArmEmitterContext context) // Fused.
{
if (Optimizations.FastFP && Optimizations.UseSse2)
if (Optimizations.FastFP && Optimizations.UseSse41)
{
OpCodeSimdReg op = (OpCodeSimdReg)context.CurrOp;
Operand n = GetVec(op.Rn);
Operand m = GetVec(op.Rm);
int sizeF = op.Size & 1;
if (sizeF == 0)
{
Operand maskHalf = X86GetAllElements(context, 0.5f);
Operand maskThree = X86GetAllElements(context, 3f);
Operand maskHalf = X86GetAllElements(context, 0.5f);
Operand maskThree = X86GetAllElements(context, 3f);
Operand maskOneHalf = X86GetAllElements(context, 1.5f);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulps, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulps, n, m);
res = context.AddIntrinsic(Intrinsic.X86Subps, maskThree, res);
res = context.AddIntrinsic(Intrinsic.X86Mulps, maskHalf, res);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, maskOneHalf, scalar: false, sizeF);
if (op.RegisterSize == RegisterSize.Simd64)
{
@ -1929,13 +1951,15 @@ namespace ARMeilleure.Instructions
}
else /* if (sizeF == 1) */
{
Operand maskHalf = X86GetAllElements(context, 0.5d);
Operand maskThree = X86GetAllElements(context, 3d);
Operand maskHalf = X86GetAllElements(context, 0.5d);
Operand maskThree = X86GetAllElements(context, 3d);
Operand maskOneHalf = X86GetAllElements(context, 1.5d);
Operand res = context.AddIntrinsic(Intrinsic.X86Mulpd, GetVec(op.Rn), GetVec(op.Rm));
Operand res = context.AddIntrinsic(Intrinsic.X86Mulpd, n, m);
res = context.AddIntrinsic(Intrinsic.X86Subpd, maskThree, res);
res = context.AddIntrinsic(Intrinsic.X86Mulpd, maskHalf, res);
res = EmitSse41RecipStepSelectOpF(context, n, m, res, maskOneHalf, scalar: false, sizeF);
context.Copy(GetVec(op.Rd), res);
}
@ -3566,7 +3590,7 @@ namespace ARMeilleure.Instructions
context.Copy(GetVec(op.Rd), res);
}
private static Operand EmitSse41FP32RoundExp8(ArmEmitterContext context, Operand value, bool scalar)
private static Operand EmitSse41Round32Exp8OpF(ArmEmitterContext context, Operand value, bool scalar)
{
Operand roundMask;
Operand truncMask;
@ -3587,7 +3611,7 @@ namespace ARMeilleure.Instructions
Operand oValue = value;
Operand masked = context.AddIntrinsic(Intrinsic.X86Pand, value, expMask);
Operand isNaNInf = context.AddIntrinsic(Intrinsic.X86Pcmpeqw, masked, expMask);
Operand isNaNInf = context.AddIntrinsic(Intrinsic.X86Pcmpeqd, masked, expMask);
value = context.AddIntrinsic(Intrinsic.X86Paddw, value, roundMask);
value = context.AddIntrinsic(Intrinsic.X86Pand, value, truncMask);
@ -3595,6 +3619,51 @@ namespace ARMeilleure.Instructions
return context.AddIntrinsic(Intrinsic.X86Blendvps, value, oValue, isNaNInf);
}
private static Operand EmitSse41RecipStepSelectOpF(
ArmEmitterContext context,
Operand n,
Operand m,
Operand res,
Operand mask,
bool scalar,
int sizeF)
{
Intrinsic cmpOp;
Intrinsic shlOp;
Intrinsic blendOp;
Operand zero = context.VectorZero();
Operand expMask;
if (sizeF == 0)
{
cmpOp = Intrinsic.X86Pcmpeqd;
shlOp = Intrinsic.X86Pslld;
blendOp = Intrinsic.X86Blendvps;
expMask = scalar ? X86GetScalar(context, 0x7F800000 << 1) : X86GetAllElements(context, 0x7F800000 << 1);
}
else /* if (sizeF == 1) */
{
cmpOp = Intrinsic.X86Pcmpeqq;
shlOp = Intrinsic.X86Psllq;
blendOp = Intrinsic.X86Blendvpd;
expMask = scalar ? X86GetScalar(context, 0x7FF0000000000000L << 1) : X86GetAllElements(context, 0x7FF0000000000000L << 1);
}
n = context.AddIntrinsic(shlOp, n, Const(1));
m = context.AddIntrinsic(shlOp, m, Const(1));
Operand nZero = context.AddIntrinsic(cmpOp, n, zero);
Operand mZero = context.AddIntrinsic(cmpOp, m, zero);
Operand nInf = context.AddIntrinsic(cmpOp, n, expMask);
Operand mInf = context.AddIntrinsic(cmpOp, m, expMask);
Operand nmZero = context.AddIntrinsic(Intrinsic.X86Por, nZero, mZero);
Operand nmInf = context.AddIntrinsic(Intrinsic.X86Por, nInf, mInf);
Operand nmZeroInf = context.AddIntrinsic(Intrinsic.X86Pand, nmZero, nmInf);
return context.AddIntrinsic(blendOp, res, mask, nmZeroInf);
}
public static void EmitSse2VectorIsNaNOpF(
ArmEmitterContext context,
Operand opF,

2
ARMeilleure/Translation/PTC/Ptc.cs
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@ -28,7 +28,7 @@ namespace ARMeilleure.Translation.PTC
private const string OuterHeaderMagicString = "PTCohd\0\0";
private const string InnerHeaderMagicString = "PTCihd\0\0";
private const uint InternalVersion = 2282; //! To be incremented manually for each change to the ARMeilleure project.
private const uint InternalVersion = 2305; //! To be incremented manually for each change to the ARMeilleure project.
private const string ActualDir = "0";
private const string BackupDir = "1";