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Implement LEA.HI shader instruction (#1609)

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gdkchan 2020-10-12 21:46:04 -03:00 committed by GitHub
parent b066cfc1a3
commit e4777717cd
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3 changed files with 57 additions and 0 deletions
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2
Ryujinx.Graphics.Shader/Decoders/OpCodeTable.cs
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@ -179,6 +179,8 @@ namespace Ryujinx.Graphics.Shader.Decoders
Set("010010111101xx", InstEmit.Lea, typeof(OpCodeAluCbuf));
Set("0011011x11010x", InstEmit.Lea, typeof(OpCodeAluImm));
Set("0101101111010x", InstEmit.Lea, typeof(OpCodeAluReg));
Set("000110xxxxxxxx", InstEmit.Lea_Hi, typeof(OpCodeAluCbuf));
Set("0101101111011x", InstEmit.Lea_Hi, typeof(OpCodeAluReg));
Set("0100110001000x", InstEmit.Lop, typeof(OpCodeLopCbuf));
Set("0011100001000x", InstEmit.Lop, typeof(OpCodeLopImm));
Set("000001xxxxxxxx", InstEmit.Lop, typeof(OpCodeLopImm32));

45
Ryujinx.Graphics.Shader/Instructions/InstEmitAlu.cs
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@ -405,6 +405,51 @@ namespace Ryujinx.Graphics.Shader.Instructions
// TODO: CC, X
}
public static void Lea_Hi(EmitterContext context)
{
OpCodeAlu op = (OpCodeAlu)context.CurrOp;
bool isReg = op is OpCodeAluReg;
bool negateA;
int shift;
if (isReg)
{
negateA = op.RawOpCode.Extract(37);
shift = op.RawOpCode.Extract(28, 5);
}
else
{
negateA = op.RawOpCode.Extract(56);
shift = op.RawOpCode.Extract(51, 5);
}
Operand srcA = GetSrcA(context);
Operand srcB = GetSrcB(context);
Operand srcC = GetSrcC(context);
Operand aLow = context.ShiftLeft(srcA, Const(shift));
Operand aHigh = shift == 0 ? Const(0) : context.ShiftRightU32(srcA, Const(32 - shift));
aHigh = context.BitwiseOr(aHigh, context.ShiftLeft(srcC, Const(shift)));
if (negateA)
{
// Perform 64-bit negation by doing bitwise not of the value,
// then adding 1 and carrying over from low to high.
aLow = context.BitwiseNot(aLow);
aHigh = context.BitwiseNot(aHigh);
aLow = AddWithCarry(context, aLow, Const(1), out Operand aLowCOut);
aHigh = context.IAdd(aHigh, aLowCOut);
}
Operand res = context.IAdd(aHigh, srcB);
context.Copy(GetDest(context), res);
// TODO: CC, X
}
public static void Lop(EmitterContext context)
{
IOpCodeLop op = (IOpCodeLop)context.CurrOp;

10
Ryujinx.Graphics.Shader/Instructions/InstEmitAluHelper.cs
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@ -100,5 +100,15 @@ namespace Ryujinx.Graphics.Shader.Instructions
context.Copy(GetNF(), context.FPCompareLess (dest, zero, fpType));
}
}
public static Operand AddWithCarry(EmitterContext context, Operand lhs, Operand rhs, out Operand carryOut)
{
Operand result = context.IAdd(lhs, rhs);
// C = Rd < Rn
carryOut = context.INegate(context.ICompareLessUnsigned(result, lhs));
return result;
}
}
}