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Implement LEA.HI shader instruction (#1609)
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@ -179,6 +179,8 @@ namespace Ryujinx.Graphics.Shader.Decoders
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Set("010010111101xx", InstEmit.Lea, typeof(OpCodeAluCbuf));
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Set("0011011x11010x", InstEmit.Lea, typeof(OpCodeAluImm));
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Set("0101101111010x", InstEmit.Lea, typeof(OpCodeAluReg));
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Set("000110xxxxxxxx", InstEmit.Lea_Hi, typeof(OpCodeAluCbuf));
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Set("0101101111011x", InstEmit.Lea_Hi, typeof(OpCodeAluReg));
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Set("0100110001000x", InstEmit.Lop, typeof(OpCodeLopCbuf));
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Set("0011100001000x", InstEmit.Lop, typeof(OpCodeLopImm));
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Set("000001xxxxxxxx", InstEmit.Lop, typeof(OpCodeLopImm32));
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@ -405,6 +405,51 @@ namespace Ryujinx.Graphics.Shader.Instructions
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// TODO: CC, X
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}
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public static void Lea_Hi(EmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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bool isReg = op is OpCodeAluReg;
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bool negateA;
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int shift;
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if (isReg)
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{
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negateA = op.RawOpCode.Extract(37);
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shift = op.RawOpCode.Extract(28, 5);
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}
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else
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{
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negateA = op.RawOpCode.Extract(56);
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shift = op.RawOpCode.Extract(51, 5);
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}
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Operand srcA = GetSrcA(context);
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Operand srcB = GetSrcB(context);
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Operand srcC = GetSrcC(context);
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Operand aLow = context.ShiftLeft(srcA, Const(shift));
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Operand aHigh = shift == 0 ? Const(0) : context.ShiftRightU32(srcA, Const(32 - shift));
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aHigh = context.BitwiseOr(aHigh, context.ShiftLeft(srcC, Const(shift)));
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if (negateA)
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{
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// Perform 64-bit negation by doing bitwise not of the value,
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// then adding 1 and carrying over from low to high.
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aLow = context.BitwiseNot(aLow);
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aHigh = context.BitwiseNot(aHigh);
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aLow = AddWithCarry(context, aLow, Const(1), out Operand aLowCOut);
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aHigh = context.IAdd(aHigh, aLowCOut);
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}
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Operand res = context.IAdd(aHigh, srcB);
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context.Copy(GetDest(context), res);
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// TODO: CC, X
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}
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public static void Lop(EmitterContext context)
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{
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IOpCodeLop op = (IOpCodeLop)context.CurrOp;
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@ -100,5 +100,15 @@ namespace Ryujinx.Graphics.Shader.Instructions
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context.Copy(GetNF(), context.FPCompareLess (dest, zero, fpType));
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}
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}
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public static Operand AddWithCarry(EmitterContext context, Operand lhs, Operand rhs, out Operand carryOut)
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{
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Operand result = context.IAdd(lhs, rhs);
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// C = Rd < Rn
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carryOut = context.INegate(context.ICompareLessUnsigned(result, lhs));
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return result;
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}
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}
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}
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