IDebugToken ReadInstruction(DebugBytecodeReader reader)
{
uint instructionToken = reader.ReadUInt32("Token");
Opcode opcode = (Opcode)(instructionToken & 0xffff);
uint size;
if (opcode == Opcode.Comment)
{
size = (uint)((instructionToken >> 16) & 0x7FFF);
}
else
{
size = (uint)((instructionToken >> 24) & 0x0f);
}
var entry = reader.LocalMembers.Last();
entry.AddNote("TokenOpcode", opcode.ToString());
entry.AddNote("TokenSize", size.ToString());
IDebugToken result;
if (opcode == Opcode.Comment)
{
var token = new DebugToken();
token.Token = instructionToken;
token.Opcode = opcode;
token.Data = reader.ReadBytes("CommentData", (int)size * 4);
result = token;
}
else
{
result = DebugInstructionToken.Parse(reader, instructionToken, opcode, size);
}
if (opcode != Opcode.Comment)
{
var token = result as DebugInstructionToken;
token.Modifier = (int)((instructionToken >> 16) & 0xff);
token.Predicated = (instructionToken & 0x10000000) != 0;
token.CoIssue = (instructionToken & 0x40000000) != 0;
entry.AddNote("Modifer", token.Modifier);
entry.AddNote("Predicated", token.Predicated);
entry.AddNote("CoIssue", token.CoIssue);
}
return(result);
}
public static DebugShaderProgramChunk Parse(DebugBytecodeReader reader)
{
var program = new DebugShaderProgramChunk
{
Version = DebugShaderVersion.ParseShex(reader),
Length = reader.ReadUInt32("Length")
};
while (!reader.EndOfBuffer)
{
var opcodeIndex = program.Tokens.Count;
var opcodeToken0 = reader.PeakUint32();
var opcodeHeader = new DebugOpcodeHeader
{
OpcodeType = opcodeToken0.DecodeValue <OpcodeType>(0, 10),
Length = opcodeToken0.DecodeValue(24, 30),
IsExtended = (opcodeToken0.DecodeValue(31, 31) == 1)
};
reader.AddIndent(opcodeHeader.OpcodeType.ToString());
if (opcodeHeader.Length == 0 && opcodeHeader.OpcodeType != OpcodeType.CustomData)
{
throw new Exception("Error parsing shader");
}
DebugOpcodeToken opcodeToken;
if (opcodeHeader.OpcodeType == OpcodeType.CustomData)
{
opcodeToken = DebugCustomDataToken.Parse(reader, opcodeToken0);
}
else if (opcodeHeader.OpcodeType.IsDeclaration())
{
opcodeToken = DebugDeclarationToken.Parse(reader, opcodeHeader.OpcodeType, program.Version);
}
else // Not custom data or declaration, so must be instruction.
{
opcodeToken = DebugInstructionToken.Parse(reader, opcodeHeader);
}
program.Tokens.Add(opcodeToken);
reader.RemoveIndent();
}
return(program);
}
