public ExpressionHLSLWriter(ShaderModel shader, string expressionName)
{
Shader = shader;
ExpressionName = expressionName;
Ctab = shader.ConstantTable;
Cli = shader.Cli;
}
private string FormatOperand(ConstantTable ctab, CliToken cli, FxlcOperandType type, uint index)
{
var elementIndex = index / 4;
var componentIndex = index % 4;
var component = FormatComponent(componentIndex, ComponentCount);
switch (type)
{
case FxlcOperandType.Literal:
var literal = string.Join(", ",
Enumerable.Repeat(cli.GetLiteral(index), (int)ComponentCount));
return(string.Format("({0})", literal));
case FxlcOperandType.Temp:
return(string.Format("r{0}{1}", elementIndex, component));
case FxlcOperandType.Variable:
return(string.Format("c{0}{1}", elementIndex, component));
case FxlcOperandType.Expr:
return(string.Format("c{0}{1}", elementIndex, component));
default:
return(string.Format("unknown{0}{1}", elementIndex, component));
}
}
public string ToString(ConstantTable ctab, CliToken cli)
{
var operands = string.Join(", ", Operands.Select(o => o.FormatOperand(ctab, cli)));
return(string.Format("{0} {1}",
Opcode.ToString().ToLowerInvariant(),
operands));
}
/// <summary>
/// Format operand for FX9 preshaders
/// </summary>
/// <param name="ctab"></param>
/// <param name="cli"></param>
/// <returns></returns>
public string FormatOperand(ConstantTable ctab, CliToken cli)
{
if (IsArray == 0)
{
return(FormatOperand(ctab, cli, OpType, OpIndex));
}
else
{
return(string.Format("{0}[{1}]",
FormatOperand(ctab, cli, ArrayType, ArrayIndex),
FormatOperand(ctab, cli, OpType, OpIndex)));
}
}
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);
}
