public static WordField LoadFromRegister(FieldSpec fieldSpec, Register register)
{
int fieldSpecByteCount = fieldSpec.ByteCount;
if (fieldSpecByteCount > register.ByteCountWithPadding)
{
throw new ArgumentOutOfRangeException("fieldSpec", fieldSpec, "bytecount too large for this register");
}
WordField field = new WordField(fieldSpec, fieldSpecByteCount);
int fromRegisterStartIndex = register.ByteCountWithPadding - fieldSpecByteCount;
fieldSpecByteCount--;
while (fieldSpecByteCount >= 0)
{
field[fieldSpecByteCount] = register.GetByteWithPadding(fromRegisterStartIndex + fieldSpecByteCount);
fieldSpecByteCount--;
}
if (fieldSpec.IncludesSign)
{
field.Sign = register.Sign;
}
return(field);
}
public int CompareTo(FullWord toCompare)
{
WordField field = LoadFromFullWord(mFieldSpec, toCompare);
long wordValue = base.LongValue;
long fieldValue = field.LongValue;
return(wordValue.CompareTo(fieldValue));
}
public static WordField LoadFromFullWord(FieldSpec fieldSpec, FullWord word)
{
int fieldSpecByteCount = fieldSpec.ByteCount;
WordField field = new WordField(fieldSpec, fieldSpecByteCount);
int lowBoundByteIndex = fieldSpec.LowBoundByteIndex;
for (int i = 0; i < fieldSpecByteCount; i++)
{
field[i] = word[lowBoundByteIndex + i];
}
if (fieldSpec.IncludesSign)
{
field.Sign = word.Sign;
}
return(field);
}
