Commit Graph

3 Commits

Author SHA1 Message Date
Joseph Myers
b168057aaa Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Chris Metcalf
563a74d86c tile: fix copyright header blocks in just-committed files
I accidentally committed versions not following the conventions.
2014-10-06 13:47:02 -04:00
Chris Metcalf
d9cd52e64d tile: optimize memcmp
Customize memcmp.c for tile, using similar tricks from memcpy:

- replace MERGE macro with dblalign.
- replace memcmp_bytes function with revbytes.
- use __glibc_likely.
- use post-increment addressing.

The schedule is still not perfect: the compiler is not hoisting
code above the comparison branch, which could save a bundle or two.
memcmp speeds up by 30-40% on shorter aligned tests in benchtest,
with some tests with unaligned lengths taking a small performance hit.
2014-10-06 11:20:59 -04:00