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using System;
namespace Ryujinx.Graphics.Gal.Shader
{
static class ShaderDecodeHelper
{
public static ShaderIrOperAbuf[] GetOperAbuf20(long OpCode)
{
int Abuf = (int)(OpCode >> 20) & 0x3ff;
int Reg = (int)(OpCode >> 39) & 0xff;
int Size = (int)(OpCode >> 47) & 3;
ShaderIrOperAbuf[] Opers = new ShaderIrOperAbuf[Size + 1];
for (int Index = 0; Index <= Size; Index++)
{
Opers[Index] = new ShaderIrOperAbuf(Abuf, Reg);
}
return Opers;
}
public static ShaderIrOperAbuf GetOperAbuf28(long OpCode)
{
int Abuf = (int)(OpCode >> 28) & 0x3ff;
int Reg = (int)(OpCode >> 39) & 0xff;
return new ShaderIrOperAbuf(Abuf, Reg);
}
public static ShaderIrOperCbuf GetOperCbuf34(long OpCode)
{
return new ShaderIrOperCbuf(
(int)(OpCode >> 34) & 0x1f,
(int)(OpCode >> 20) & 0x3fff);
}
public static ShaderIrOperGpr GetOperGpr8(long OpCode)
{
return new ShaderIrOperGpr((int)(OpCode >> 8) & 0xff);
}
public static ShaderIrOperGpr GetOperGpr20(long OpCode)
{
return new ShaderIrOperGpr((int)(OpCode >> 20) & 0xff);
}
public static ShaderIrOperGpr GetOperGpr39(long OpCode)
{
return new ShaderIrOperGpr((int)(OpCode >> 39) & 0xff);
}
public static ShaderIrOperGpr GetOperGpr0(long OpCode)
{
return new ShaderIrOperGpr((int)(OpCode >> 0) & 0xff);
}
public static ShaderIrOperGpr GetOperGpr28(long OpCode)
{
return new ShaderIrOperGpr((int)(OpCode >> 28) & 0xff);
}
public static ShaderIrOperImm GetOperImm13_36(long OpCode)
{
return new ShaderIrOperImm((int)(OpCode >> 36) & 0x1fff);
}
public static ShaderIrOperImm GetOperImm32_20(long OpCode)
{
return new ShaderIrOperImm((int)(OpCode >> 20));
}
public static ShaderIrOperImmf GetOperImmf32_20(long OpCode)
{
return new ShaderIrOperImmf(BitConverter.Int32BitsToSingle((int)(OpCode >> 20)));
}
public static ShaderIrOperImm GetOperImm19_20(long OpCode)
{
int Value = (int)(OpCode >> 20) & 0x7ffff;
bool Neg = ((OpCode >> 56) & 1) != 0;
if (Neg)
{
Value = -Value;
}
return new ShaderIrOperImm((int)Value);
}
public static ShaderIrOperImmf GetOperImmf19_20(long OpCode)
{
uint Imm = (uint)(OpCode >> 20) & 0x7ffff;
bool Neg = ((OpCode >> 56) & 1) != 0;
Imm <<= 12;
if (Neg)
{
Imm |= 0x80000000;
}
float Value = BitConverter.Int32BitsToSingle((int)Imm);
return new ShaderIrOperImmf(Value);
}
public static ShaderIrOperPred GetOperPred3(long OpCode)
{
return new ShaderIrOperPred((int)(OpCode >> 3) & 7);
}
public static ShaderIrOperPred GetOperPred0(long OpCode)
{
return new ShaderIrOperPred((int)(OpCode >> 0) & 7);
}
public static ShaderIrNode GetOperPred39N(long OpCode)
{
ShaderIrNode Node = GetOperPred39(OpCode);
if (((OpCode >> 42) & 1) != 0)
{
Node = new ShaderIrOp(ShaderIrInst.Bnot, Node);
}
return Node;
}
public static ShaderIrOperPred GetOperPred39(long OpCode)
{
return new ShaderIrOperPred((int)(OpCode >> 39) & 7);
}
public static ShaderIrInst GetCmp(long OpCode)
{
switch ((int)(OpCode >> 49) & 7)
{
case 1: return ShaderIrInst.Clt;
case 2: return ShaderIrInst.Ceq;
case 3: return ShaderIrInst.Cle;
case 4: return ShaderIrInst.Cgt;
case 5: return ShaderIrInst.Cne;
case 6: return ShaderIrInst.Cge;
}
throw new ArgumentException(nameof(OpCode));
}
public static ShaderIrInst GetCmpF(long OpCode)
{
switch ((int)(OpCode >> 48) & 0xf)
{
case 0x1: return ShaderIrInst.Fclt;
case 0x2: return ShaderIrInst.Fceq;
case 0x3: return ShaderIrInst.Fcle;
case 0x4: return ShaderIrInst.Fcgt;
case 0x5: return ShaderIrInst.Fcne;
case 0x6: return ShaderIrInst.Fcge;
case 0x7: return ShaderIrInst.Fcnum;
case 0x8: return ShaderIrInst.Fcnan;
case 0x9: return ShaderIrInst.Fcltu;
case 0xa: return ShaderIrInst.Fcequ;
case 0xb: return ShaderIrInst.Fcleu;
case 0xc: return ShaderIrInst.Fcgtu;
case 0xd: return ShaderIrInst.Fcneu;
case 0xe: return ShaderIrInst.Fcgeu;
}
throw new ArgumentException(nameof(OpCode));
}
public static ShaderIrInst GetBLop(long OpCode)
{
switch ((int)(OpCode >> 45) & 3)
{
case 0: return ShaderIrInst.Band;
case 1: return ShaderIrInst.Bor;
case 2: return ShaderIrInst.Bxor;
}
throw new ArgumentException(nameof(OpCode));
}
public static ShaderIrNode GetPredNode(ShaderIrNode Node, long OpCode)
{
ShaderIrOperPred Pred = GetPredNode(OpCode);
if (Pred.Index != ShaderIrOperPred.UnusedIndex)
{
bool Inv = ((OpCode >> 19) & 1) != 0;
Node = new ShaderIrCond(Pred, Node, Inv);
}
return Node;
}
private static ShaderIrOperPred GetPredNode(long OpCode)
{
int Pred = (int)(OpCode >> 16) & 0xf;
if (Pred != 0xf)
{
Pred &= 7;
}
return new ShaderIrOperPred(Pred);
}
public static ShaderIrNode GetAluAbsNeg(ShaderIrNode Node, bool Abs, bool Neg)
{
return GetAluNeg(GetAluAbs(Node, Abs), Neg);
}
public static ShaderIrNode GetAluAbs(ShaderIrNode Node, bool Abs)
{
return Abs ? new ShaderIrOp(ShaderIrInst.Fabs, Node) : Node;
}
public static ShaderIrNode GetAluNeg(ShaderIrNode Node, bool Neg)
{
return Neg ? new ShaderIrOp(ShaderIrInst.Fneg, Node) : Node;
}
public static ShaderIrNode GetAluNot(ShaderIrNode Node, bool Not)
{
return Not ? new ShaderIrOp(ShaderIrInst.Not, Node) : Node;
}
}
}
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