public static void Vrint_RM(ArmEmitterContext context)
{
OpCode32SimdCvtFI op = (OpCode32SimdCvtFI)context.CurrOp;
OperandType floatSize = op.RegisterSize == RegisterSize.Int64 ? OperandType.FP64 : OperandType.FP32;
Operand toConvert = ExtractScalar(context, floatSize, op.Vm);
switch (op.Opc2)
{
case 0b00: // Away
toConvert = EmitRoundMathCall(context, MidpointRounding.AwayFromZero, toConvert);
break;
case 0b01: // Nearest
toConvert = EmitRoundMathCall(context, MidpointRounding.ToEven, toConvert);
break;
case 0b10: // Towards positive infinity
toConvert = EmitUnaryMathCall(context, MathF.Ceiling, Math.Ceiling, toConvert);
break;
case 0b11: // Towards negative infinity
toConvert = EmitUnaryMathCall(context, MathF.Floor, Math.Floor, toConvert);
break;
}
InsertScalar(context, op.Vd, toConvert);
}
public static void Vrint_RM(ArmEmitterContext context)
{
OpCode32SimdCvtFI op = (OpCode32SimdCvtFI)context.CurrOp;
OperandType floatSize = op.RegisterSize == RegisterSize.Int64 ? OperandType.FP64 : OperandType.FP32;
int rm = op.Opc2 & 3;
if (Optimizations.UseSse2 && rm != 0b00)
{
EmitScalarUnaryOpSimd32(context, (m) =>
{
Intrinsic inst = (op.Size & 1) == 0 ? Intrinsic.X86Roundss : Intrinsic.X86Roundsd;
FPRoundingMode roundMode = RMToRoundMode(rm);
return(context.AddIntrinsic(inst, m, Const(X86GetRoundControl(roundMode))));
});
}
else
{
Operand toConvert = ExtractScalar(context, floatSize, op.Vm);
switch (rm)
{
case 0b00: // Away
toConvert = EmitRoundMathCall(context, MidpointRounding.AwayFromZero, toConvert);
break;
case 0b01: // Nearest
toConvert = EmitRoundMathCall(context, MidpointRounding.ToEven, toConvert);
break;
case 0b10: // Towards positive infinity
toConvert = EmitUnaryMathCall(context, MathF.Ceiling, Math.Ceiling, toConvert);
break;
case 0b11: // Towards negative infinity
toConvert = EmitUnaryMathCall(context, MathF.Floor, Math.Floor, toConvert);
break;
}
InsertScalar(context, op.Vd, toConvert);
}
}
// VCVTA/M/N/P (floating-point).
public static void Vcvt_RM(ArmEmitterContext context)
{
OpCode32SimdCvtFI op = (OpCode32SimdCvtFI)context.CurrOp; // toInteger == true (opCode<18> == 1 => Opc2<2> == 1).
OperandType floatSize = op.RegisterSize == RegisterSize.Int64 ? OperandType.FP64 : OperandType.FP32;
bool unsigned = op.Opc == 0;
int rm = op.Opc2 & 3;
if (Optimizations.UseSse41 && rm != 0b00)
{
EmitSse41ConvertInt32(context, RMToRoundMode(rm), !unsigned);
}
else
{
Operand toConvert = ExtractScalar(context, floatSize, op.Vm);
switch (rm)
{
case 0b00: // Away
toConvert = EmitRoundMathCall(context, MidpointRounding.AwayFromZero, toConvert);
break;
case 0b01: // Nearest
toConvert = EmitRoundMathCall(context, MidpointRounding.ToEven, toConvert);
break;
case 0b10: // Towards positive infinity
toConvert = EmitUnaryMathCall(context, nameof(Math.Ceiling), toConvert);
break;
case 0b11: // Towards negative infinity
toConvert = EmitUnaryMathCall(context, nameof(Math.Floor), toConvert);
break;
}
Operand asInteger;
asInteger = EmitSaturateFloatToInt(context, toConvert, unsigned);
InsertScalar(context, op.Vd, asInteger);
}
}
private static void EmitSse41ConvertInt32(ArmEmitterContext context, FPRoundingMode roundMode, bool signed)
{
// A port of the similar round function in InstEmitSimdCvt.
OpCode32SimdCvtFI op = (OpCode32SimdCvtFI)context.CurrOp;
bool doubleSize = (op.Size & 1) != 0;
int shift = doubleSize ? 1 : 2;
Operand n = GetVecA32(op.Vm >> shift);
n = EmitSwapScalar(context, n, op.Vm, doubleSize);
if (!doubleSize)
{
Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpss, n, n, Const((int)CmpCondition.OrderedQ));
nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
nRes = context.AddIntrinsic(Intrinsic.X86Roundss, nRes, Const(X86GetRoundControl(roundMode)));
Operand zero = context.VectorZero();
Operand nCmp;
Operand nIntOrLong2 = default;
if (!signed)
{
nCmp = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, nCmp);
}
int fpMaxVal = 0x4F000000; // 2.14748365E9f (2147483648)
Operand fpMaxValMask = X86GetScalar(context, fpMaxVal);
Operand nIntOrLong = context.AddIntrinsicInt(Intrinsic.X86Cvtss2si, nRes);
if (!signed)
{
nRes = context.AddIntrinsic(Intrinsic.X86Subss, nRes, fpMaxValMask);
nCmp = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, nCmp);
nIntOrLong2 = context.AddIntrinsicInt(Intrinsic.X86Cvtss2si, nRes);
}
nRes = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
Operand nInt = context.AddIntrinsicInt(Intrinsic.X86Cvtsi2si, nRes);
Operand dRes;
if (signed)
{
dRes = context.BitwiseExclusiveOr(nIntOrLong, nInt);
}
else
{
dRes = context.BitwiseExclusiveOr(nIntOrLong2, nInt);
dRes = context.Add(dRes, nIntOrLong);
}
InsertScalar(context, op.Vd, dRes);
}
else
{
Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpsd, n, n, Const((int)CmpCondition.OrderedQ));
nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
nRes = context.AddIntrinsic(Intrinsic.X86Roundsd, nRes, Const(X86GetRoundControl(roundMode)));
Operand zero = context.VectorZero();
Operand nCmp;
Operand nIntOrLong2 = default;
if (!signed)
{
nCmp = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, nCmp);
}
long fpMaxVal = 0x41E0000000000000L; // 2147483648.0000000d (2147483648)
Operand fpMaxValMask = X86GetScalar(context, fpMaxVal);
Operand nIntOrLong = context.AddIntrinsicInt(Intrinsic.X86Cvtsd2si, nRes);
if (!signed)
{
nRes = context.AddIntrinsic(Intrinsic.X86Subsd, nRes, fpMaxValMask);
nCmp = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, nCmp);
nIntOrLong2 = context.AddIntrinsicInt(Intrinsic.X86Cvtsd2si, nRes);
}
nRes = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
Operand nLong = context.AddIntrinsicLong(Intrinsic.X86Cvtsi2si, nRes);
nLong = context.ConvertI64ToI32(nLong);
Operand dRes;
if (signed)
{
dRes = context.BitwiseExclusiveOr(nIntOrLong, nLong);
}
else
{
dRes = context.BitwiseExclusiveOr(nIntOrLong2, nLong);
dRes = context.Add(dRes, nIntOrLong);
}
InsertScalar(context, op.Vd, dRes);
}
}
// VCVT (floating-point to integer, floating-point) | VCVT (integer to floating-point, floating-point).
public static void Vcvt_FI(ArmEmitterContext context)
{
OpCode32SimdCvtFI op = (OpCode32SimdCvtFI)context.CurrOp;
bool toInteger = (op.Opc2 & 0b100) != 0;
OperandType floatSize = op.RegisterSize == RegisterSize.Int64 ? OperandType.FP64 : OperandType.FP32;
if (toInteger)
{
bool unsigned = (op.Opc2 & 1) == 0;
bool roundWithFpscr = op.Opc != 1;
if (!roundWithFpscr && Optimizations.UseSse41)
{
EmitSse41ConvertInt32(context, FPRoundingMode.TowardsZero, !unsigned);
}
else
{
Operand toConvert = ExtractScalar(context, floatSize, op.Vm);
Operand asInteger;
// TODO: Fast Path.
if (roundWithFpscr)
{
MethodInfo info;
if (floatSize == OperandType.FP64)
{
info = unsigned
? typeof(SoftFallback).GetMethod(nameof(SoftFallback.DoubleToUInt32))
: typeof(SoftFallback).GetMethod(nameof(SoftFallback.DoubleToInt32));
}
else
{
info = unsigned
? typeof(SoftFallback).GetMethod(nameof(SoftFallback.FloatToUInt32))
: typeof(SoftFallback).GetMethod(nameof(SoftFallback.FloatToInt32));
}
asInteger = context.Call(info, toConvert);
}
else
{
// Round towards zero.
asInteger = EmitSaturateFloatToInt(context, toConvert, unsigned);
}
InsertScalar(context, op.Vd, asInteger);
}
}
else
{
bool unsigned = op.Opc == 0;
Operand toConvert = ExtractScalar(context, OperandType.I32, op.Vm);
Operand asFloat = EmitFPConvert(context, toConvert, floatSize, !unsigned);
InsertScalar(context, op.Vd, asFloat);
}
}
public static void Vcvt_FI(ArmEmitterContext context)
{
OpCode32SimdCvtFI op = (OpCode32SimdCvtFI)context.CurrOp;
bool toInteger = (op.Opc2 & 0b100) != 0;
OperandType floatSize = op.RegisterSize == RegisterSize.Int64 ? OperandType.FP64 : OperandType.FP32;
if (toInteger)
{
bool unsigned = (op.Opc2 & 1) == 0;
bool roundWithFpscr = op.Opc != 1;
Operand toConvert = ExtractScalar(context, floatSize, op.Vm);
Operand asInteger;
// TODO: Fast Path.
if (roundWithFpscr)
{
// These need to get the FPSCR value, so it's worth noting we'd need to do a c# call at some point.
if (floatSize == OperandType.FP64)
{
if (unsigned)
{
asInteger = context.Call(new _U32_F64(SoftFallback.DoubleToUInt32), toConvert);
}
else
{
asInteger = context.Call(new _S32_F64(SoftFallback.DoubleToInt32), toConvert);
}
}
else
{
if (unsigned)
{
asInteger = context.Call(new _U32_F32(SoftFallback.FloatToUInt32), toConvert);
}
else
{
asInteger = context.Call(new _S32_F32(SoftFallback.FloatToInt32), toConvert);
}
}
}
else
{
// Round towards zero.
asInteger = EmitSaturateFloatToInt(context, toConvert, unsigned);
}
InsertScalar(context, op.Vd, asInteger);
}
else
{
bool unsigned = op.Opc == 0;
Operand toConvert = ExtractScalar(context, OperandType.I32, op.Vm);
Operand asFloat = EmitFPConvert(context, toConvert, floatSize, !unsigned);
InsertScalar(context, op.Vd, asFloat);
}
}
