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using System;
using static Ryujinx.Graphics.Gal.Shader.ShaderDecodeHelper;
namespace Ryujinx.Graphics.Gal.Shader
{
static partial class ShaderDecode
{
private enum IntType
{
U8 = 0,
U16 = 1,
U32 = 2,
U64 = 3,
S8 = 4,
S16 = 5,
S32 = 6,
S64 = 7
}
private enum FloatType
{
F16 = 1,
F32 = 2,
F64 = 3
}
public static void I2f_C(ShaderIrBlock Block, long OpCode)
{
EmitI2f(Block, OpCode, ShaderOper.CR);
}
public static void I2f_I(ShaderIrBlock Block, long OpCode)
{
EmitI2f(Block, OpCode, ShaderOper.Imm);
}
public static void I2f_R(ShaderIrBlock Block, long OpCode)
{
EmitI2f(Block, OpCode, ShaderOper.RR);
}
private static void EmitI2f(ShaderIrBlock Block, long OpCode, ShaderOper Oper)
{
IntType Type = GetIntType(OpCode);
if (Type == IntType.U64 ||
Type == IntType.S64)
{
//TODO: 64-bits support.
//Note: GLSL doesn't support 64-bits integers.
throw new NotImplementedException();
}
int Sel = (int)(OpCode >> 41) & 3;
bool Na = ((OpCode >> 45) & 1) != 0;
bool Aa = ((OpCode >> 49) & 1) != 0;
ShaderIrNode OperA;
switch (Oper)
{
case ShaderOper.CR: OperA = GetOperCbuf34 (OpCode); break;
case ShaderOper.Imm: OperA = GetOperImm19_20(OpCode); break;
case ShaderOper.RR: OperA = GetOperGpr20 (OpCode); break;
default: throw new ArgumentException(nameof(Oper));
}
OperA = GetAluAbsNeg(OperA, Aa, Na);
bool Signed = Type >= IntType.S8;
int Shift = Sel * 8;
int Size = 8 << ((int)Type & 3);
ulong Mask = ulong.MaxValue >> (64 - Size);
int Mask32 = (int)Mask;
if (Shift != 0)
{
OperA = new ShaderIrOp(ShaderIrInst.Asr, OperA, new ShaderIrOperImm(Shift));
}
if (Mask != uint.MaxValue)
{
OperA = new ShaderIrOp(ShaderIrInst.And, OperA, new ShaderIrOperImm(Mask32));
}
ShaderIrInst Inst = Signed
? ShaderIrInst.Stof
: ShaderIrInst.Utof;
ShaderIrNode Op = new ShaderIrOp(Inst, OperA);
Block.AddNode(GetPredNode(new ShaderIrAsg(GetOperGpr0(OpCode), Op), OpCode));
}
public static void Mov32i(ShaderIrBlock Block, long OpCode)
{
ShaderIrOperImm Imm = GetOperImm32_20(OpCode);
Block.AddNode(GetPredNode(new ShaderIrAsg(GetOperGpr0(OpCode), Imm), OpCode));
}
private static IntType GetIntType(long OpCode)
{
bool Signed = ((OpCode >> 13) & 1) != 0;
IntType Type = (IntType)((OpCode >> 10) & 3);
if (Signed)
{
Type += (int)IntType.S8;
}
return Type;
}
private static FloatType GetFloatType(long OpCode)
{
return (FloatType)((OpCode >> 8) & 3);
}
}
}
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