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Fpsr and Fpcr freed. (#3701)

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* Implemented in IR the managed methods of the Saturating region ...

... of the SoftFallback class (the SatQ ones).

The need to natively manage the Fpcr and Fpsr system registers is still a fact.

Contributes to https://github.com/Ryujinx/Ryujinx/issues/2917 ; I will open another PR to implement in Intrinsics-branchless the methods of the Saturation region as well (the SatXXXToXXX ones).

All instructions involved have been tested locally in both release and debug modes, in both lowcq and highcq.

* Ptc.InternalVersion = 3665

* Addressed PR feedback.

* Implemented in IR the managed methods of the ShlReg region of the SoftFallback class.

It also includes the last two SatQ ones (following up on https://github.com/Ryujinx/Ryujinx/pull/3665).

All instructions involved have been tested locally in both release and debug modes, in both lowcq and highcq.

* Fpsr and Fpcr freed.

Handling/isolation of Fpsr and Fpcr via register for IR and via memory for Tests and Threads, with synchronization to context exchanges (explicit for SoftFloat); without having to call managed methods. Thanks to the inlining work of the previous two PRs and others in this.

Tests performed locally in both release and debug modes, in both lowcq and highcq, with FastFP to true and false (explicit FP tests included). Tested with the title Tony Hawk's PS.

Depends on shlreg.

* Update InstEmitSimdHelper.cs

* De-magic Masks.

Remove the Stride and Len flags; Fpsr.NZCV are A32 only, then moved to Fpscr: this leads to emitting less IR in reference to Get/Set Fpsr/Fpcr/Fpscr methods in reference to Mrs/Msr (A64) and Vmrs/Vmsr (A32) instructions.

* Addressed PR feedback.
This commit is contained in:
LDj3SNuD 2022-09-20 23:55:13 +02:00 • committed by GitHub
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commit 814f75142e
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70
ARMeilleure/Instructions/SoftFallback.cs
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@ -91,76 +91,6 @@ namespace ARMeilleure.Instructions
}
#endregion
#region "Rounding"
public static double Round(double value)
{
ExecutionContext context = NativeInterface.GetContext();
FPRoundingMode roundMode = context.Fpcr.GetRoundingMode();
if (roundMode == FPRoundingMode.ToNearest)
{
return Math.Round(value); // even
}
else if (roundMode == FPRoundingMode.TowardsPlusInfinity)
{
return Math.Ceiling(value);
}
else if (roundMode == FPRoundingMode.TowardsMinusInfinity)
{
return Math.Floor(value);
}
else /* if (roundMode == FPRoundingMode.TowardsZero) */
{
return Math.Truncate(value);
}
}
public static float RoundF(float value)
{
ExecutionContext context = NativeInterface.GetContext();
FPRoundingMode roundMode = context.Fpcr.GetRoundingMode();
if (roundMode == FPRoundingMode.ToNearest)
{
return MathF.Round(value); // even
}
else if (roundMode == FPRoundingMode.TowardsPlusInfinity)
{
return MathF.Ceiling(value);
}
else if (roundMode == FPRoundingMode.TowardsMinusInfinity)
{
return MathF.Floor(value);
}
else /* if (roundMode == FPRoundingMode.TowardsZero) */
{
return MathF.Truncate(value);
}
}
public static int FloatToInt32(float value)
{
return SatF32ToS32(RoundF(value));
}
public static int DoubleToInt32(double value)
{
return SatF64ToS32(Round(value));
}
public static uint FloatToUInt32(float value)
{
return SatF32ToU32(RoundF(value));
}
public static uint DoubleToUInt32(double value)
{
return SatF64ToU32(Round(value));
}
#endregion
#region "Saturation"
public static int SatF32ToS32(float value)
{