| Per Westermark 07/03/09 04:12 Read: 133 times Sweden |
#166694 - Hand-crafted libraries Responding to: Andy Neil's previous message |
Andy Neil said:
Christoph Franck said:
C simply doesn't know about any of these operations, so the compiler never uses the instructions. Although 'C' itself doesn't know about them, the compiler might still decide that it can use them to advantage. It may also include Libraries that use them - so your compiler output may still include these instructions! It is very common that the manufacturer supplies hand-optimized libraries with assembler code that makes use of these extra instructions. But I don't see this as compiler output. |
| 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 |