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More accurate impl of FMINNM/FMAXNM, add vector variants (#296)

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* More accurate impl of FMINNM/FMAXNM, add vector variants

* Optimize for the 0 case when op1 != op2

* Address PR feedback
This commit is contained in:
gdkchan 2018-08-05 02:54:21 -03:00 • committed by GitHub
parent eeb626947e
commit 221270db90
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 336 additions and 174 deletions
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80
ChocolArm64/Instruction/AVectorHelper.cs
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@ -93,86 +93,6 @@ namespace ChocolArm64.Instruction
Value < ulong.MinValue ? ulong.MinValue : (ulong)Value;
}
public static double Max(double LHS, double RHS)
{
if (LHS == 0.0 && RHS == 0.0)
{
if (BitConverter.DoubleToInt64Bits(LHS) < 0 &&
BitConverter.DoubleToInt64Bits(RHS) < 0)
return -0.0;
return 0.0;
}
if (LHS > RHS)
return LHS;
if (double.IsNaN(LHS))
return LHS;
return RHS;
}
public static float MaxF(float LHS, float RHS)
{
if (LHS == 0.0 && RHS == 0.0)
{
if (BitConverter.SingleToInt32Bits(LHS) < 0 &&
BitConverter.SingleToInt32Bits(RHS) < 0)
return -0.0f;
return 0.0f;
}
if (LHS > RHS)
return LHS;
if (float.IsNaN(LHS))
return LHS;
return RHS;
}
public static double Min(double LHS, double RHS)
{
if (LHS == 0.0 && RHS == 0.0)
{
if (BitConverter.DoubleToInt64Bits(LHS) < 0 ||
BitConverter.DoubleToInt64Bits(RHS) < 0)
return -0.0;
return 0.0;
}
if (LHS < RHS)
return LHS;
if (double.IsNaN(LHS))
return LHS;
return RHS;
}
public static float MinF(float LHS, float RHS)
{
if (LHS == 0.0 && RHS == 0.0)
{
if (BitConverter.SingleToInt32Bits(LHS) < 0 ||
BitConverter.SingleToInt32Bits(RHS) < 0)
return -0.0f;
return 0.0f;
}
if (LHS < RHS)
return LHS;
if (float.IsNaN(LHS))
return LHS;
return RHS;
}
public static double Round(double Value, int Fpcr)
{
switch ((ARoundMode)((Fpcr >> 22) & 3))