Ryujinx/Ryujinx.Graphics/Gal/Shader/ShaderDecoder.cs

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namespace Ryujinx.Graphics.Gal.Shader
{
static class ShaderDecoder
{
private const bool AddDbgComments = true;
public static ShaderIrBlock DecodeBasicBlock(IGalMemory Memory, long Position)
{
ShaderIrBlock Block = new ShaderIrBlock();
while (true)
{
Block.Position = Position;
Block.MarkLabel(Position);
//Ignore scheduling instructions, which are written every 32 bytes.
if ((Position & 0x1f) == 0)
{
Position += 8;
continue;
}
uint Word0 = (uint)Memory.ReadInt32(Position + 0);
uint Word1 = (uint)Memory.ReadInt32(Position + 4);
Position += 8;
long OpCode = Word0 | (long)Word1 << 32;
ShaderDecodeFunc Decode = ShaderOpCodeTable.GetDecoder(OpCode);
if (AddDbgComments)
{
string DbgOpCode = $"0x{Position:x16}: 0x{OpCode:x16} ";
Block.AddNode(new ShaderIrCmnt(DbgOpCode + (Decode?.Method.Name ?? "???")));
}
if (Decode == null)
{
continue;
}
Decode(Block, OpCode);
if (Block.GetLastNode() is ShaderIrOp Op && Op.Inst == ShaderIrInst.Exit)
{
break;
}
}
return Block;
}
private static bool IsFlowChange(ShaderIrInst Inst)
{
return Inst == ShaderIrInst.Exit;
}
}
}