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https://github.com/GreemDev/Ryujinx
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e44a43c7e1
* Implement VMAD shader instruction and improve InvocationInfo and ISBERD handling * Shader cache version bump * Fix typo
118 lines
No EOL
4.2 KiB
C#
118 lines
No EOL
4.2 KiB
C#
using Ryujinx.Graphics.Shader.Decoders;
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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
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using Ryujinx.Graphics.Shader.Translation;
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using static Ryujinx.Graphics.Shader.Instructions.InstEmitHelper;
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using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
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namespace Ryujinx.Graphics.Shader.Instructions
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{
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static partial class InstEmit
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{
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public static void Vmad(EmitterContext context)
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{
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InstVmad op = context.GetOp<InstVmad>();
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bool aSigned = (op.ASelect & VectorSelect.S8B0) != 0;
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bool bSigned = (op.BSelect & VectorSelect.S8B0) != 0;
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Operand srcA = InstEmitAluHelper.Extend(context, GetSrcReg(context, op.SrcA), op.ASelect);
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Operand srcC = context.INegate(GetSrcReg(context, op.SrcC), op.AvgMode == AvgMode.NegB);
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Operand srcB;
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if (op.BVideo)
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{
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srcB = InstEmitAluHelper.Extend(context, GetSrcReg(context, op.SrcB), op.BSelect);
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}
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else
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{
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int imm = op.Imm16;
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if (bSigned)
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{
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imm = (imm << 16) >> 16;
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}
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srcB = Const(imm);
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}
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Operand productLow = context.IMultiply(srcA, srcB);
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Operand productHigh;
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if (aSigned == bSigned)
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{
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productHigh = aSigned
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? context.MultiplyHighS32(srcA, srcB)
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: context.MultiplyHighU32(srcA, srcB);
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}
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else
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{
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Operand temp = aSigned
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? context.IMultiply(srcB, context.ShiftRightS32(srcA, Const(31)))
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: context.IMultiply(srcA, context.ShiftRightS32(srcB, Const(31)));
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productHigh = context.IAdd(temp, context.MultiplyHighU32(srcA, srcB));
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}
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if (op.AvgMode == AvgMode.NegA)
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{
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(productLow, productHigh) = InstEmitAluHelper.NegateLong(context, productLow, productHigh);
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}
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Operand resLow = InstEmitAluHelper.AddWithCarry(context, productLow, srcC, out Operand sumCarry);
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Operand resHigh = context.IAdd(productHigh, sumCarry);
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if (op.AvgMode == AvgMode.PlusOne)
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{
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resLow = InstEmitAluHelper.AddWithCarry(context, resLow, Const(1), out Operand poCarry);
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resHigh = context.IAdd(resHigh, poCarry);
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}
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bool resSigned = op.ASelect == VectorSelect.S32 ||
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op.BSelect == VectorSelect.S32 ||
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op.AvgMode == AvgMode.NegB ||
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op.AvgMode == AvgMode.NegA;
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int shift = op.VideoScale switch
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{
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VideoScale.Shr7 => 7,
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VideoScale.Shr15 => 15,
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_ => 0
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};
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if (shift != 0)
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{
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// Low = (Low >> Shift) | (High << (32 - Shift))
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// High >>= Shift
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resLow = context.ShiftRightU32(resLow, Const(shift));
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resLow = context.BitwiseOr(resLow, context.ShiftLeft(resHigh, Const(32 - shift)));
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resHigh = resSigned
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? context.ShiftRightS32(resHigh, Const(shift))
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: context.ShiftRightU32(resHigh, Const(shift));
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}
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Operand res = resLow;
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if (op.Sat)
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{
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Operand sign = context.ShiftRightS32(resHigh, Const(31));
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if (resSigned)
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{
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Operand overflow = context.ICompareNotEqual(resHigh, context.ShiftRightS32(resLow, Const(31)));
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Operand clampValue = context.ConditionalSelect(sign, Const(int.MinValue), Const(int.MaxValue));
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res = context.ConditionalSelect(overflow, clampValue, resLow);
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}
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else
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{
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Operand overflow = context.ICompareNotEqual(resHigh, Const(0));
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res = context.ConditionalSelect(overflow, context.BitwiseNot(sign), resLow);
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}
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}
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context.Copy(GetDest(op.Dest), res);
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// TODO: CC.
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}
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}
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} |