private static void AppendImmediate(StringBuilder str, ImmediateSize size)
{
switch (size)
{
case ImmediateSize.Zero: break;
case ImmediateSize.Fixed8: str.Append(" ib"); break;
case ImmediateSize.Fixed16: str.Append(" iw"); break;
case ImmediateSize.Fixed32: str.Append(" id"); break;
case ImmediateSize.Fixed64: str.Append(" iq"); break;
case ImmediateSize.Operand16Or32: str.Append(" iwd"); break;
case ImmediateSize.Operand16Or32Or64: str.Append(" iwdq"); break;
case ImmediateSize.Address16Or32: str.Append(" rel"); break;
default: throw new ArgumentException(nameof(size));
}
}
public static InstructionEncoding WithSecondImmediateSize(this InstructionEncoding encoding, ImmediateSize size)
{
return (encoding & ~InstructionEncoding.SecondImmediateSize_Mask)
| (InstructionEncoding)((uint)size << (int)InstructionEncoding.SecondImmediateSize_Shift);
}
public static InstructionEncoding WithImmediateSizes(this InstructionEncoding encoding,
ImmediateSize firstSize, ImmediateSize secondSize = ImmediateSize.Zero)
{
return (encoding & ~InstructionEncoding.ImmediateSizes_Mask)
| (InstructionEncoding)((uint)firstSize << (int)InstructionEncoding.FirstImmediateSize_Shift)
| (InstructionEncoding)((uint)secondSize << (int)InstructionEncoding.SecondImmediateSize_Shift);
}
private void AddImmediate(ImmediateSize size)
{
Contract.Requires(state >= State.PostOpcode);
int immediateCount = encoding.GetImmediateCount();
Contract.Requires(immediateCount < 2);
encoding = (immediateCount == 0)
? encoding.WithFirstImmediateSize(size)
: encoding.WithSecondImmediateSize(size);
AdvanceTo(State.Immediates);
}
