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Lower precision of estimate instruction results to match Arm behavior (#1943)

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* Lower precision of estimate instruction results to match Arm behavior

* PTC version update

* Nits
This commit is contained in:
gdkchan 2021-01-27 20:23:00 -03:00 committed by GitHub
parent 98d0240ce6
commit dcce407071
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 66 additions and 19 deletions
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83
ARMeilleure/Instructions/InstEmitSimdArithmetic.cs
View file

@ -1475,9 +1475,11 @@ namespace ARMeilleure.Instructions
int sizeF = op.Size & 1;
if (Optimizations.FastFP && Optimizations.UseSse && sizeF == 0)
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
EmitScalarUnaryOpF(context, Intrinsic.X86Rcpss, 0);
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rcpss, GetVec(op.Rn)), scalar: true);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
else
{
@ -1494,9 +1496,16 @@ namespace ARMeilleure.Instructions
int sizeF = op.Size & 1;
if (Optimizations.FastFP && Optimizations.UseSse && sizeF == 0)
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
EmitVectorUnaryOpF(context, Intrinsic.X86Rcpps, 0);
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rcpps, GetVec(op.Rn)), scalar: false);
if (op.RegisterSize == RegisterSize.Simd64)
{
res = context.VectorZeroUpper64(res);
}
context.Copy(GetVec(op.Rd), res);
}
else
{
@ -1652,7 +1661,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitScalarRoundOpF(context, FPRoundingMode.TowardsMinusInfinity);
EmitSse41ScalarRoundOpF(context, FPRoundingMode.TowardsMinusInfinity);
}
else
{
@ -1667,7 +1676,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitVectorRoundOpF(context, FPRoundingMode.TowardsMinusInfinity);
EmitSse41VectorRoundOpF(context, FPRoundingMode.TowardsMinusInfinity);
}
else
{
@ -1682,7 +1691,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitScalarRoundOpF(context, FPRoundingMode.ToNearest);
EmitSse41ScalarRoundOpF(context, FPRoundingMode.ToNearest);
}
else
{
@ -1697,7 +1706,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitVectorRoundOpF(context, FPRoundingMode.ToNearest);
EmitSse41VectorRoundOpF(context, FPRoundingMode.ToNearest);
}
else
{
@ -1712,7 +1721,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitScalarRoundOpF(context, FPRoundingMode.TowardsPlusInfinity);
EmitSse41ScalarRoundOpF(context, FPRoundingMode.TowardsPlusInfinity);
}
else
{
@ -1727,7 +1736,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitVectorRoundOpF(context, FPRoundingMode.TowardsPlusInfinity);
EmitSse41VectorRoundOpF(context, FPRoundingMode.TowardsPlusInfinity);
}
else
{
@ -1778,7 +1787,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitScalarRoundOpF(context, FPRoundingMode.TowardsZero);
EmitSse41ScalarRoundOpF(context, FPRoundingMode.TowardsZero);
}
else
{
@ -1793,7 +1802,7 @@ namespace ARMeilleure.Instructions
{
if (Optimizations.UseSse41)
{
EmitVectorRoundOpF(context, FPRoundingMode.TowardsZero);
EmitSse41VectorRoundOpF(context, FPRoundingMode.TowardsZero);
}
else
{
@ -1810,9 +1819,11 @@ namespace ARMeilleure.Instructions
int sizeF = op.Size & 1;
if (Optimizations.FastFP && Optimizations.UseSse && sizeF == 0)
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
EmitScalarUnaryOpF(context, Intrinsic.X86Rsqrtss, 0);
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rsqrtss, GetVec(op.Rn)), scalar: true);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
else
{
@ -1829,9 +1840,16 @@ namespace ARMeilleure.Instructions
int sizeF = op.Size & 1;
if (Optimizations.FastFP && Optimizations.UseSse && sizeF == 0)
if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
EmitVectorUnaryOpF(context, Intrinsic.X86Rsqrtps, 0);
Operand res = EmitSse41FP32RoundExp8(context, context.AddIntrinsic(Intrinsic.X86Rsqrtps, GetVec(op.Rn)), scalar: false);
if (op.RegisterSize == RegisterSize.Simd64)
{
res = context.VectorZeroUpper64(res);
}
context.Copy(GetVec(op.Rd), res);
}
else
{
@ -3498,7 +3516,7 @@ namespace ARMeilleure.Instructions
return context.ConditionalSelect(cmp, op1, op2);
}
private static void EmitScalarRoundOpF(ArmEmitterContext context, FPRoundingMode roundMode)
private static void EmitSse41ScalarRoundOpF(ArmEmitterContext context, FPRoundingMode roundMode)
{
OpCodeSimd op = (OpCodeSimd)context.CurrOp;
@ -3520,7 +3538,7 @@ namespace ARMeilleure.Instructions
context.Copy(GetVec(op.Rd), res);
}
private static void EmitVectorRoundOpF(ArmEmitterContext context, FPRoundingMode roundMode)
private static void EmitSse41VectorRoundOpF(ArmEmitterContext context, FPRoundingMode roundMode)
{
OpCodeSimd op = (OpCodeSimd)context.CurrOp;
@ -3538,6 +3556,35 @@ namespace ARMeilleure.Instructions
context.Copy(GetVec(op.Rd), res);
}
private static Operand EmitSse41FP32RoundExp8(ArmEmitterContext context, Operand value, bool scalar)
{
Operand roundMask;
Operand truncMask;
Operand expMask;
if (scalar)
{
roundMask = X86GetScalar(context, 0x4000);
truncMask = X86GetScalar(context, unchecked((int)0xFFFF8000));
expMask = X86GetScalar(context, 0x7F800000);
}
else
{
roundMask = X86GetAllElements(context, 0x4000);
truncMask = X86GetAllElements(context, unchecked((int)0xFFFF8000));
expMask = X86GetAllElements(context, 0x7F800000);
}
Operand oValue = value;
Operand masked = context.AddIntrinsic(Intrinsic.X86Pand, value, expMask);
Operand isNaNInf = context.AddIntrinsic(Intrinsic.X86Pcmpeqw, masked, expMask);
value = context.AddIntrinsic(Intrinsic.X86Paddw, value, roundMask);
value = context.AddIntrinsic(Intrinsic.X86Pand, value, truncMask);
return context.AddIntrinsic(Intrinsic.X86Blendvps, value, oValue, isNaNInf);
}
public static void EmitSse2VectorIsNaNOpF(
ArmEmitterContext context,
Operand opF,

2
ARMeilleure/Translation/PTC/Ptc.cs
View file

@ -22,7 +22,7 @@ namespace ARMeilleure.Translation.PTC
{
private const string HeaderMagic = "PTChd";
private const int InternalVersion = 1956; //! To be incremented manually for each change to the ARMeilleure project.
private const int InternalVersion = 1943; //! To be incremented manually for each change to the ARMeilleure project.
private const string ActualDir = "0";
private const string BackupDir = "1";