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CPU: Produce non-inf results for RSQRTE instruction with subnormal inputs (#6634) 

* CPU: Produce non-inf results for RSQRTE instruction with subnormal inputs

* PPTC version bump
This commit is contained in:
gdkchan 2024-04-09 14:34:14 -03:00 committed by GitHub
parent 338ff79e1e
commit 543d75a587
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GPG Key ID: B5690EEEBB952194
2 changed files with 11 additions and 3 deletions
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12
src/ARMeilleure/Instructions/InstEmitSimdArithmetic.cs
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@ -2426,7 +2426,11 @@ namespace ARMeilleure.Instructions
}
else if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
Operand res = EmitSse41Round32Exp8OpF(context, context.AddIntrinsic(Intrinsic.X86Rsqrtss, GetVec(op.Rn)), scalar: true);
// RSQRTSS handles subnormals as zero, which differs from Arm, so we can't use it here.
Operand res = context.AddIntrinsic(Intrinsic.X86Sqrtss, GetVec(op.Rn));
res = context.AddIntrinsic(Intrinsic.X86Rcpss, res);
res = EmitSse41Round32Exp8OpF(context, res, scalar: true);
context.Copy(GetVec(op.Rd), context.VectorZeroUpper96(res));
}
@ -2451,7 +2455,11 @@ namespace ARMeilleure.Instructions
}
else if (Optimizations.FastFP && Optimizations.UseSse41 && sizeF == 0)
{
Operand res = EmitSse41Round32Exp8OpF(context, context.AddIntrinsic(Intrinsic.X86Rsqrtps, GetVec(op.Rn)), scalar: false);
// RSQRTPS handles subnormals as zero, which differs from Arm, so we can't use it here.
Operand res = context.AddIntrinsic(Intrinsic.X86Sqrtps, GetVec(op.Rn));
res = context.AddIntrinsic(Intrinsic.X86Rcpps, res);
res = EmitSse41Round32Exp8OpF(context, res, scalar: false);
if (op.RegisterSize == RegisterSize.Simd64)
{

2
src/ARMeilleure/Translation/PTC/Ptc.cs
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@ -29,7 +29,7 @@ namespace ARMeilleure.Translation.PTC
private const string OuterHeaderMagicString = "PTCohd\0\0";
private const string InnerHeaderMagicString = "PTCihd\0\0";
private const uint InternalVersion = 6613; //! To be incremented manually for each change to the ARMeilleure project.
private const uint InternalVersion = 6634; //! To be incremented manually for each change to the ARMeilleure project.
private const string ActualDir = "0";
private const string BackupDir = "1";