public static int LoadSignedInt(string bits)
{
if (bits.Length != vmConstants.INSTRUCTION_OPERANDLENGTH)
{
throw new ArgumentOutOfRangeException("bits");
}
bool isNegative = bits[0] == '1';
string value = bits.Substring(1, vmConstants.INSTRUCTION_OPERANDLENGTH - 1);
if (isNegative)
{
value = BinaryUtility.GetTwosComplement(value);
}
int bitValue = LoadUnsignedInt(value);
return(isNegative ? -bitValue : bitValue);
}