Subtract two unsigned integers, checking for overflow (aka borrow).
The overflow is sticky, meaning a sequence of operations can be done and overflow need only be checked at the end.
left operand
right operand
set if an overflow occurs, is not affected otherwise
the difference
See Implementation
Subtract two unsigned integers, checking for overflow (aka borrow).
The overflow is sticky, meaning a sequence of operations can be done and overflow need only be checked at the end.