public static BytecodeChunk Parse(BytecodeReader reader, uint chunkSize, BytecodeContainer container)
{
var result = new FxlcChunk();
var chunkReader = reader.CopyAtCurrentPosition();
result.Fxlc = FxlcBlock.Parse(chunkReader);
return(result);
}
Token ReadInstruction(BytecodeReader reader)
{
uint instructionToken = reader.ReadUInt32();
Opcode opcode = (Opcode)(instructionToken & 0xffff);
int size;
if (opcode == Opcode.Comment)
{
size = (int)((instructionToken >> 16) & 0x7FFF);
}
else
{
size = (int)((instructionToken >> 24) & 0x0f);
}
Token token = null;
if (opcode == Opcode.Comment)
{
var fourCC = reader.ReadUInt32();
if (KnownCommentTypes.ContainsKey(fourCC))
{
var commentReader = reader.CopyAtCurrentPosition();
reader.ReadBytes(size * 4 - 4);
switch (KnownCommentTypes[fourCC])
{
case CommentType.CTAB:
ConstantTable = ConstantTable.Parse(commentReader);
return(null);
case CommentType.C**T:
Cli = CliToken.Parse(commentReader);
return(null);
case CommentType.FXLC:
Fxlc = FxlcBlock.Parse(commentReader);
return(null);
case CommentType.PRES:
Preshader = Preshader.Parse(commentReader);
return(null);
case CommentType.PRSI:
Prsi = PrsiToken.Parse(commentReader);
return(null);
}
}
token = new CommentToken(opcode, size, this);
token.Data[0] = fourCC;
for (int i = 1; i < size; i++)
{
token.Data[i] = reader.ReadUInt32();
}
}
else
{
token = new InstructionToken(opcode, size, this);
var inst = token as InstructionToken;
for (int i = 0; i < size; i++)
{
token.Data[i] = reader.ReadUInt32();
if (opcode == Opcode.Def || opcode == Opcode.DefB || opcode == Opcode.DefI)
{
if (i == 0)
{
inst.Operands.Add(new DestinationOperand(token.Data[i]));
}
}
else if (opcode == Opcode.Dcl)
{
if (i == 0)
{
inst.Operands.Add(new DeclarationOperand(token.Data[i]));
}
else
{
inst.Operands.Add(new DestinationOperand(token.Data[i]));
}
}
else if (i == 0 && opcode.HasDestination())
{
if ((token.Data[i] & (1 << 13)) != 0)
{
//Relative Address mode
token.Data[i + 1] = reader.ReadUInt32();
inst.Operands.Add(new DestinationOperand(token.Data[i], token.Data[i + 1]));
i++;
}
else
{
inst.Operands.Add(new DestinationOperand(token.Data[i]));
}
}
else if ((token.Data[i] & (1 << 13)) != 0)
{
//Relative Address mode
token.Data[i + 1] = reader.ReadUInt32();
inst.Operands.Add(new SourceOperand(token.Data[i], token.Data[i + 1]));
i++;
}
else
{
inst.Operands.Add(new SourceOperand(token.Data[i]));
}
}
if (opcode != Opcode.Comment)
{
token.Modifier = (int)((instructionToken >> 16) & 0xff);
token.Predicated = (instructionToken & 0x10000000) != 0;
token.CoIssue = (instructionToken & 0x40000000) != 0;
Debug.Assert((instructionToken & 0xA0000000) == 0, $"Instruction has unexpected bits set {instructionToken & 0xE0000000}");
}
}
return(token);
}
