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using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.Translation;
using static Ryujinx.Graphics.Shader.Instructions.InstEmitHelper;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Instructions
{
static partial class InstEmit
{
public static void ShfLR(EmitterContext context)
{
InstShfLR op = context.GetOp<InstShfLR>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = GetSrcReg(context, op.SrcB);
var srcC = GetSrcReg(context, op.SrcC);
EmitShf(context, op.MaxShift, srcA, srcB, srcC, op.Dest, op.M, left: true, op.WriteCC);
}
public static void ShfRR(EmitterContext context)
{
InstShfRR op = context.GetOp<InstShfRR>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = GetSrcReg(context, op.SrcB);
var srcC = GetSrcReg(context, op.SrcC);
EmitShf(context, op.MaxShift, srcA, srcB, srcC, op.Dest, op.M, left: false, op.WriteCC);
}
public static void ShfLI(EmitterContext context)
{
InstShfLI op = context.GetOp<InstShfLI>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = Const(op.Imm6);
var srcC = GetSrcReg(context, op.SrcC);
EmitShf(context, op.MaxShift, srcA, srcB, srcC, op.Dest, op.M, left: true, op.WriteCC);
}
public static void ShfRI(EmitterContext context)
{
InstShfRI op = context.GetOp<InstShfRI>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = Const(op.Imm6);
var srcC = GetSrcReg(context, op.SrcC);
EmitShf(context, op.MaxShift, srcA, srcB, srcC, op.Dest, op.M, left: false, op.WriteCC);
}
public static void ShlR(EmitterContext context)
{
InstShlR op = context.GetOp<InstShlR>();
EmitShl(context, GetSrcReg(context, op.SrcA), GetSrcReg(context, op.SrcB), op.Dest, op.M);
}
public static void ShlI(EmitterContext context)
{
InstShlI op = context.GetOp<InstShlI>();
EmitShl(context, GetSrcReg(context, op.SrcA), GetSrcImm(context, Imm20ToSInt(op.Imm20)), op.Dest, op.M);
}
public static void ShlC(EmitterContext context)
{
InstShlC op = context.GetOp<InstShlC>();
EmitShl(context, GetSrcReg(context, op.SrcA), GetSrcCbuf(context, op.CbufSlot, op.CbufOffset), op.Dest, op.M);
}
public static void ShrR(EmitterContext context)
{
InstShrR op = context.GetOp<InstShrR>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = GetSrcReg(context, op.SrcB);
EmitShr(context, srcA, srcB, op.Dest, op.M, op.Brev, op.Signed);
}
public static void ShrI(EmitterContext context)
{
InstShrI op = context.GetOp<InstShrI>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = GetSrcImm(context, Imm20ToSInt(op.Imm20));
EmitShr(context, srcA, srcB, op.Dest, op.M, op.Brev, op.Signed);
}
public static void ShrC(EmitterContext context)
{
InstShrC op = context.GetOp<InstShrC>();
var srcA = GetSrcReg(context, op.SrcA);
var srcB = GetSrcCbuf(context, op.CbufSlot, op.CbufOffset);
EmitShr(context, srcA, srcB, op.Dest, op.M, op.Brev, op.Signed);
}
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.
}
private static void EmitShl(EmitterContext context, Operand srcA, Operand srcB, int rd, bool mask)
{
if (mask)
{
srcB = context.BitwiseAnd(srcB, Const(0x1f));
}
Operand res = context.ShiftLeft(srcA, srcB);
if (!mask)
{
// Clamped shift value.
Operand isLessThan32 = context.ICompareLessUnsigned(srcB, Const(32));
res = context.ConditionalSelect(isLessThan32, res, Const(0));
}
// TODO: X, CC.
context.Copy(GetDest(rd), res);
}
private static void EmitShr(
EmitterContext context,
Operand srcA,
Operand srcB,
int rd,
bool mask,
bool bitReverse,
bool isSigned)
{
if (bitReverse)
{
srcA = context.BitfieldReverse(srcA);
}
if (mask)
{
srcB = context.BitwiseAnd(srcB, Const(0x1f));
}
Operand res = isSigned
? context.ShiftRightS32(srcA, srcB)
: context.ShiftRightU32(srcA, srcB);
if (!mask)
{
// Clamped shift value.
Operand resShiftBy32;
if (isSigned)
{
resShiftBy32 = context.ShiftRightS32(srcA, Const(31));
}
else
{
resShiftBy32 = Const(0);
}
Operand isLessThan32 = context.ICompareLessUnsigned(srcB, Const(32));
res = context.ConditionalSelect(isLessThan32, res, resShiftBy32);
}
// TODO: X, CC.
context.Copy(GetDest(rd), res);
}
}
}
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