| commit | 423216ed3273dae18c347ce52c5ecc193cfdd4e5 | [log] [tgz] |
|---|---|---|
| author | Anton Blanchard <anton@samba.org> | Tue Sep 16 10:49:14 2014 +1000 |
| committer | Michael Ellerman <mpe@ellerman.id.au> | Thu Sep 25 23:14:49 2014 +1000 |
| tree | 9f1f095dbd57904697dabd2c463e1decace2faa8 | |
| parent | ff2e466aa2339238c941dee873e553687e941f3f [diff] |
powerpc: Use CONFIG_ARCH_HAS_FAST_MULTIPLIER I ran some tests to compare hash_64 using shifts and multiplies. The results: POWER6: ~2x slower POWER7: ~2x faster POWER8: ~2x faster Now we have a proper config option, select CONFIG_ARCH_HAS_FAST_MULTIPLIER on POWER7 and POWER8. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>