| ??? 08/03/09 12:42 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#168105 - C is really unsuited for this purpose. Responding to: ???'s previous message |
Yogesh Gudekar said:
I want to carry out following Hexadecimal Arithmetic operation using C code C is very much unsuited for this purpose as it does not allow the programmer to access the carry flag, which is essential for performing extended (i.e. higher than supported natively by the CPU) width arithmetics without wasting lots of CPU cycles on "manual" overflow checks. In C, you would have to check for overflow without using the carry flag ... which is certainly possible, but a major drain on CPU resources (cycles, program space, etc). Hence, extended-width arithmetics are usually implemented as assembly functions that are callable from C. Are you really, really sure this _must_ be done in C? |
| Topic | Author | Date |
| Hexadecimal Arithmetic | 01/01/70 00:00 | |
| Cross-post | 01/01/70 00:00 | |
| C is really unsuited for this purpose. | 01/01/70 00:00 | |
| RE: 'C' does not allow access to the carry flag | 01/01/70 00:00 | |
| That shoots down the reason to use C: | 01/01/70 00:00 | |
| hexadecimal arithmetic | 01/01/70 00:00 | |
You already have answers to that question! | 01/01/70 00:00 |