public static void Fswzadd(EmitterContext context)
{
InstFswzadd op = context.GetOp <InstFswzadd>();
Operand srcA = GetSrcReg(context, op.SrcA);
Operand srcB = GetSrcReg(context, op.SrcB);
Operand dest = GetDest(op.Dest);
context.Copy(dest, context.FPSwizzleAdd(srcA, srcB, op.PnWord));
InstEmitAluHelper.SetFPZnFlags(context, dest, op.WriteCC);
}
public static void Vmad(EmitterContext context)
{
InstVmad op = context.GetOp <InstVmad>();
bool aSigned = (op.ASelect & VectorSelect.S8B0) != 0;
bool bSigned = (op.BSelect & VectorSelect.S8B0) != 0;
Operand srcA = InstEmitAluHelper.Extend(context, GetSrcReg(context, op.SrcA), op.ASelect);
Operand srcC = context.INegate(GetSrcReg(context, op.SrcC), op.AvgMode == AvgMode.NegB);
Operand srcB;
if (op.BVideo)
{
srcB = InstEmitAluHelper.Extend(context, GetSrcReg(context, op.SrcB), op.BSelect);
}
else
{
int imm = op.Imm16;
if (bSigned)
{
imm = (imm << 16) >> 16;
}
srcB = Const(imm);
}
Operand productLow = context.IMultiply(srcA, srcB);
Operand productHigh;
if (aSigned == bSigned)
{
productHigh = aSigned
? context.MultiplyHighS32(srcA, srcB)
: context.MultiplyHighU32(srcA, srcB);
}
else
{
Operand temp = aSigned
? context.IMultiply(srcB, context.ShiftRightS32(srcA, Const(31)))
: context.IMultiply(srcA, context.ShiftRightS32(srcB, Const(31)));
productHigh = context.IAdd(temp, context.MultiplyHighU32(srcA, srcB));
}
if (op.AvgMode == AvgMode.NegA)
{
(productLow, productHigh) = InstEmitAluHelper.NegateLong(context, productLow, productHigh);
}
Operand resLow = InstEmitAluHelper.AddWithCarry(context, productLow, srcC, out Operand sumCarry);
Operand resHigh = context.IAdd(productHigh, sumCarry);
if (op.AvgMode == AvgMode.PlusOne)
{
resLow = InstEmitAluHelper.AddWithCarry(context, resLow, Const(1), out Operand poCarry);
resHigh = context.IAdd(resHigh, poCarry);
}
bool resSigned = op.ASelect == VectorSelect.S32 ||
op.BSelect == VectorSelect.S32 ||
op.AvgMode == AvgMode.NegB ||
op.AvgMode == AvgMode.NegA;
int shift = op.VideoScale switch
{
VideoScale.Shr7 => 7,
VideoScale.Shr15 => 15,
_ => 0
};
if (shift != 0)
{
// Low = (Low >> Shift) | (High << (32 - Shift))
// High >>= Shift
resLow = context.ShiftRightU32(resLow, Const(shift));
resLow = context.BitwiseOr(resLow, context.ShiftLeft(resHigh, Const(32 - shift)));
resHigh = resSigned
? context.ShiftRightS32(resHigh, Const(shift))
: context.ShiftRightU32(resHigh, Const(shift));
}
Operand res = resLow;
if (op.Sat)
{
Operand sign = context.ShiftRightS32(resHigh, Const(31));
if (resSigned)
{
Operand overflow = context.ICompareNotEqual(resHigh, context.ShiftRightS32(resLow, Const(31)));
Operand clampValue = context.ConditionalSelect(sign, Const(int.MinValue), Const(int.MaxValue));
res = context.ConditionalSelect(overflow, clampValue, resLow);
}
else
{
Operand overflow = context.ICompareNotEqual(resHigh, Const(0));
res = context.ConditionalSelect(overflow, context.BitwiseNot(sign), resLow);
}
}
context.Copy(GetDest(op.Dest), res);
// TODO: CC.
}
}
public static void Vsetp(EmitterContext context)
{
InstVsetp op = context.GetOp <InstVsetp>();
Operand srcA = Extend(context, GetSrcReg(context, op.SrcA), op.ASelect);
Operand srcB;
if (op.BVideo)
{
srcB = Extend(context, GetSrcReg(context, op.SrcB), op.BSelect);
}
else
{
int imm = op.Imm16;
if ((op.BSelect & VectorSelect.S8B0) != 0)
{
imm = (imm << 16) >> 16;
}
srcB = Const(imm);
}
Operand p0Res;
bool signedA = (op.ASelect & VectorSelect.S8B0) != 0;
bool signedB = (op.BSelect & VectorSelect.S8B0) != 0;
if (signedA != signedB)
{
bool a32 = (op.ASelect & ~VectorSelect.S8B0) == VectorSelect.U32;
bool b32 = (op.BSelect & ~VectorSelect.S8B0) == VectorSelect.U32;
if (!a32 && !b32)
{
// Both values are extended small integer and can always fit in a S32, just do a signed comparison.
p0Res = GetIntComparison(context, op.VComp, srcA, srcB, isSigned: true, extended: false);
}
else
{
// TODO: Mismatching sign case.
p0Res = Const(0);
}
}
else
{
// Sign matches, just do a regular comparison.
p0Res = GetIntComparison(context, op.VComp, srcA, srcB, signedA, extended: false);
}
Operand p1Res = context.BitwiseNot(p0Res);
Operand pred = GetPredicate(context, op.SrcPred, op.SrcPredInv);
p0Res = InstEmitAluHelper.GetPredLogicalOp(context, op.BoolOp, p0Res, pred);
p1Res = InstEmitAluHelper.GetPredLogicalOp(context, op.BoolOp, p1Res, pred);
context.Copy(Register(op.DestPred, RegisterType.Predicate), p0Res);
context.Copy(Register(op.DestPredInv, RegisterType.Predicate), p1Res);
}
private static void EmitShf(
EmitterContext context,
MaxShift maxShift,
Operand srcA,
Operand srcB,
Operand srcC,
int rd,
bool mask,
bool left,
bool writeCC)
{
bool isLongShift = maxShift == MaxShift.U64 || maxShift == MaxShift.S64;
bool signedShift = maxShift == MaxShift.S64;
int maxShiftConst = isLongShift ? 64 : 32;
if (mask)
{
srcB = context.BitwiseAnd(srcB, Const(maxShiftConst - 1));
}
Operand res;
if (left)
{
// res = (C << B) | (A >> (32 - B))
res = context.ShiftLeft(srcC, srcB);
res = context.BitwiseOr(res, context.ShiftRightU32(srcA, context.ISubtract(Const(32), srcB)));
if (isLongShift)
{
// res = B >= 32 ? A << (B - 32) : res
Operand lowerShift = context.ShiftLeft(srcA, context.ISubtract(srcB, Const(32)));
Operand shiftGreaterThan31 = context.ICompareGreaterOrEqualUnsigned(srcB, Const(32));
res = context.ConditionalSelect(shiftGreaterThan31, lowerShift, res);
}
}
else
{
// res = (A >> B) | (C << (32 - B))
res = context.ShiftRightU32(srcA, srcB);
res = context.BitwiseOr(res, context.ShiftLeft(srcC, context.ISubtract(Const(32), srcB)));
if (isLongShift)
{
// res = B >= 32 ? C >> (B - 32) : res
Operand upperShift = signedShift
? context.ShiftRightS32(srcC, context.ISubtract(srcB, Const(32)))
: context.ShiftRightU32(srcC, context.ISubtract(srcB, Const(32)));
Operand shiftGreaterThan31 = context.ICompareGreaterOrEqualUnsigned(srcB, Const(32));
res = context.ConditionalSelect(shiftGreaterThan31, upperShift, res);
}
}
if (!mask)
{
// Clamped shift value.
Operand isLessThanMax = context.ICompareLessUnsigned(srcB, Const(maxShiftConst));
res = context.ConditionalSelect(isLessThanMax, res, Const(0));
}
context.Copy(GetDest(rd), res);
if (writeCC)
{
InstEmitAluHelper.SetZnFlags(context, res, writeCC);
}
// TODO: X.
}
public static void Vmnmx(EmitterContext context)
{
InstVmnmx op = context.GetOp <InstVmnmx>();
Operand srcA = InstEmitAluHelper.Extend(context, GetSrcReg(context, op.SrcA), op.ASelect);
Operand srcC = GetSrcReg(context, op.SrcC);
Operand srcB;
if (op.BVideo)
{
srcB = InstEmitAluHelper.Extend(context, GetSrcReg(context, op.SrcB), op.BSelect);
}
else
{
int imm = op.Imm16;
if ((op.BSelect & VectorSelect.S8B0) != 0)
{
imm = (imm << 16) >> 16;
}
srcB = Const(imm);
}
Operand res;
bool resSigned;
if ((op.ASelect & VectorSelect.S8B0) != (op.BSelect & VectorSelect.S8B0))
{
// Signedness is different, but for max, result will always fit a U32,
// since one of the inputs can't be negative, and the result is the one
// with highest value. For min, it will always fit on a S32, since
// one of the input can't be greater than INT_MAX and we want the lowest value.
resSigned = !op.Mn;
res = op.Mn ? context.IMaximumU32(srcA, srcB) : context.IMinimumS32(srcA, srcB);
if ((op.ASelect & VectorSelect.S8B0) != 0)
{
Operand isBGtIntMax = context.ICompareLess(srcB, Const(0));
res = context.ConditionalSelect(isBGtIntMax, srcB, res);
}
else
{
Operand isAGtIntMax = context.ICompareLess(srcA, Const(0));
res = context.ConditionalSelect(isAGtIntMax, srcA, res);
}
}
else
{
// Ra and Rb have the same signedness, so doesn't matter which one we test.
resSigned = (op.ASelect & VectorSelect.S8B0) != 0;
if (op.Mn)
{
res = resSigned
? context.IMaximumS32(srcA, srcB)
: context.IMaximumU32(srcA, srcB);
}
else
{
res = resSigned
? context.IMinimumS32(srcA, srcB)
: context.IMinimumU32(srcA, srcB);
}
}
if (op.Sat)
{
if (op.DFormat && !resSigned)
{
res = context.IMinimumU32(res, Const(int.MaxValue));
}
else if (!op.DFormat && resSigned)
{
res = context.IMaximumS32(res, Const(0));
}
}
switch (op.VideoOp)
{
case VideoOp.Acc:
res = context.IAdd(res, srcC);
break;
case VideoOp.Max:
res = op.DFormat ? context.IMaximumS32(res, srcC) : context.IMaximumU32(res, srcC);
break;
case VideoOp.Min:
res = op.DFormat ? context.IMinimumS32(res, srcC) : context.IMinimumU32(res, srcC);
break;
case VideoOp.Mrg16h:
res = context.BitfieldInsert(srcC, res, Const(16), Const(16));
break;
case VideoOp.Mrg16l:
res = context.BitfieldInsert(srcC, res, Const(0), Const(16));
break;
case VideoOp.Mrg8b0:
res = context.BitfieldInsert(srcC, res, Const(0), Const(8));
break;
case VideoOp.Mrg8b2:
res = context.BitfieldInsert(srcC, res, Const(16), Const(8));
break;
}
context.Copy(GetDest(op.Dest), res);
}
