/// <summary>
/// Gets the high condition.
/// </summary>
/// <param name="code">The code.</param>
/// <returns></returns>
private static IR.ConditionCode GetHighCondition(IR.ConditionCode code)
{
switch (code)
{
case IR.ConditionCode.Equal: return IR.ConditionCode.NotEqual;
case IR.ConditionCode.GreaterOrEqual: return IR.ConditionCode.LessThan;
case IR.ConditionCode.GreaterThan: return IR.ConditionCode.LessThan;
case IR.ConditionCode.LessOrEqual: return IR.ConditionCode.GreaterThan;
case IR.ConditionCode.LessThan: return IR.ConditionCode.GreaterThan;
case IR.ConditionCode.NotEqual: return IR.ConditionCode.Equal;
default: return code;
}
}
/// <summary>
/// Emits a literal constant into the code stream.
/// </summary>
/// <param name="label">The label to apply to the data.</param>
/// <param name="LiteralData"></param>
// SigType type, object data)
void ICodeEmitter.Literal(int label, IR.LiteralData LiteralData)
{
// Save the current position
long currentPosition = _codeStream.Position;
// Relative branch offset
//int relOffset;
// Flag, if we should really emit the literal (only if the literal is used!)
bool emit = false;
// Byte representation of the literal
byte[] bytes;
// Check if this label has forward references on it...
emit = (0 != _literals.RemoveAll (delegate(Patch p)
{
if (p.label == label)
{
_codeStream.Position = p.position;
// HACK: We can't do PIC right now
//relOffset = (int)currentPosition - ((int)p.position + 4);
bytes = LittleEndianBitConverter.GetBytes ((int)currentPosition);
_codeStream.Write (bytes, 0, bytes.Length);
return true;
}
return false;
}));
if (emit)
{
_codeStream.Position = currentPosition;
switch (LiteralData.Type.Type) {
case CilElementType.I8:
bytes = LittleEndianBitConverter.GetBytes ((long)LiteralData.Data);
break;
case CilElementType.U8:
bytes = LittleEndianBitConverter.GetBytes ((ulong)LiteralData.Data);
break;
case CilElementType.R4:
bytes = LittleEndianBitConverter.GetBytes ((float)LiteralData.Data);
break;
case CilElementType.R8:
bytes = LittleEndianBitConverter.GetBytes ((double)LiteralData.Data);
break;
default:
throw new NotImplementedException ();
}
_codeStream.Write (bytes, 0, bytes.Length);
}
}