public static FxlcToken Parse(BytecodeReader reader)
{
var result = new FxlcToken();
var token = reader.ReadUInt32();
var tokenComponentCount = token.DecodeValue(0, 2);
result.Opcode = (FxlcOpcode)token.DecodeValue(20, 30);
result.IsScalarInstruction = token.DecodeValue <bool>(31, 31);
Debug.Assert(Enum.IsDefined(typeof(FxlcOpcode), result.Opcode),
$"Unknown FxlcOpcode {result.Opcode}");
Debug.Assert(token.DecodeValue(3, 19) == 0,
$"Unexpected data in FxlcToken bits 3-19 {token.DecodeValue(3, 19)}");
var operandCount = reader.ReadUInt32();
for (int i = 0; i < operandCount; i++)
{
var isScalarOp = i == 0 && result.IsScalarInstruction;
result.Operands.Add(FxlcOperand.Parse(reader, tokenComponentCount, isScalarOp));
}
// destination operand
result.Operands.Insert(0, FxlcOperand.Parse(reader, tokenComponentCount, false));
return(result);
}
public static FxlcOperand Parse(BytecodeReader reader, uint componentCount, bool isScalarOp)
{
var result = new FxlcOperand()
{
IsArray = reader.ReadUInt32(),
OpType = (FxlcOperandType)reader.ReadUInt32(),
OpIndex = reader.ReadUInt32(),
};
result.ComponentCount = isScalarOp && result.OpType != FxlcOperandType.Literal ? 1 : componentCount;
Debug.Assert(Enum.IsDefined(typeof(FxlcOperandType), result.OpType),
$"Unexpected FxlcOperandType OpType {result.OpType}");
if (result.IsArray == 1)
{
result.ArrayType = (FxlcOperandType)reader.ReadUInt32();
result.ArrayIndex = reader.ReadUInt32();
Debug.Assert(Enum.IsDefined(typeof(FxlcOperandType), result.ArrayType),
$"Unexpected FxlcOperandType ArrayType {result.ArrayType}");
}
return(result);
}
