private static void EmitF2F(
EmitterContext context,
DstFmt srcType,
DstFmt dstType,
IntegerRound roundingMode,
Operand src,
int rd,
bool absolute,
bool negate,
bool saturate)
{
Operand srcB = context.FPAbsNeg(src, absolute, negate, srcType.ToInstFPType());
if (srcType == dstType)
{
srcB = roundingMode switch
{
IntegerRound.Round => context.FPRound(srcB, srcType.ToInstFPType()),
IntegerRound.Floor => context.FPFloor(srcB, srcType.ToInstFPType()),
IntegerRound.Ceil => context.FPCeiling(srcB, srcType.ToInstFPType()),
IntegerRound.Trunc => context.FPTruncate(srcB, srcType.ToInstFPType()),
_ => srcB
};
}
// We don't need to handle conversions between FP16 <-> FP32
// since we do FP16 operations as FP32 directly.
// FP16 <-> FP64 conversions are invalid.
if (srcType == DstFmt.F32 && dstType == DstFmt.F64)
{
srcB = context.FP32ConvertToFP64(srcB);
}
else if (srcType == DstFmt.F64 && dstType == DstFmt.F32)
{
srcB = context.FP64ConvertToFP32(srcB);
}
srcB = context.FPSaturate(srcB, saturate, dstType.ToInstFPType());
WriteFP(context, dstType, srcB, rd);
// TODO: CC.
}
private static void EmitF2I(
EmitterContext context,
DstFmt srcType,
IDstFmt dstType,
RoundMode2 roundingMode,
Operand src,
int rd,
bool absolute,
bool negate)
{
if (dstType == IDstFmt.U64)
{
context.Config.GpuAccessor.Log("Unimplemented 64-bits F2I.");
return;
}
Instruction fpType = srcType.ToInstFPType();
bool isSignedInt = dstType == IDstFmt.S16 || dstType == IDstFmt.S32 || dstType == IDstFmt.S64;
bool isSmallInt = dstType == IDstFmt.U16 || dstType == IDstFmt.S16;
Operand srcB = context.FPAbsNeg(src, absolute, negate, fpType);
srcB = roundingMode switch
{
RoundMode2.Round => context.FPRound(srcB, fpType),
RoundMode2.Floor => context.FPFloor(srcB, fpType),
RoundMode2.Ceil => context.FPCeiling(srcB, fpType),
RoundMode2.Trunc => context.FPTruncate(srcB, fpType),
_ => srcB
};
if (!isSignedInt)
{
// Negative float to uint cast is undefined, so we clamp the value before conversion.
srcB = context.FPMaximum(srcB, ConstF(0), fpType);
}
if (srcType == DstFmt.F64)
{
srcB = isSignedInt
? context.FP64ConvertToS32(srcB)
: context.FP64ConvertToU32(srcB);
}
else
{
srcB = isSignedInt
? context.FP32ConvertToS32(srcB)
: context.FP32ConvertToU32(srcB);
}
if (isSmallInt)
{
int min = (int)GetIntMin(dstType);
int max = (int)GetIntMax(dstType);
srcB = isSignedInt
? context.IClampS32(srcB, Const(min), Const(max))
: context.IClampU32(srcB, Const(min), Const(max));
}
Operand dest = GetDest(rd);
context.Copy(dest, srcB);
// TODO: CC.
}