| Andy Neil 07/02/09 16:50 Read: 150 times Basingstoke Uk |
#166679 - Why do you ask? Responding to: Karim Fallahzadeh's previous message |
Is it purely out of curiosity, or do you have some need to know?
A compiler will use whatever instructions it deems necessary to implement the supplied source code. If there is no reason or need to use a particular machine instruction, then it won't get used - just like a real assembly programmer will only use an instruction if he has a need for it. With an open-source compiler like SDCC, you could examine its code generation and see if there are any instructions that could never occur - but what would be the point? |
| Topic | Author | Date |
| c compilers | Karim Fallahzadeh | 07/02/09 14:17 |
| Didnt get it... | MUNISH KUMAR | 07/02/09 14:41 |
| Why do you ask? | Andy Neil | 07/02/09 16:50 |
| Depends a lot on processor and compiler | Per Westermark | 07/02/09 21:26 |
| Other examples: | Christoph Franck | 07/03/09 03:16 |
| Not necessarily true | Andy Neil | 07/03/09 03:47 |
| Hand-crafted libraries | Per Westermark | 07/03/09 04:12 |
| I don't see this as compiler output | Andy Neil | 07/03/09 04:18 |
Seemed to be quite explicit question | Per Westermark | 07/03/09 04:42 |