| commit | eb2c88c7c83901737db5c4de7dc4470c5681b2cb | |
| author | H.J. Lu <hjl.tools@gmail.com> | |
| Thu, 19 May 2016 15:49:45 +0000 (19 08:49 -0700) | ||
| committer | H.J. Lu <hjl.tools@gmail.com> | |
| Thu, 19 May 2016 15:49:55 +0000 (19 08:49 -0700) | ||
| tree | e885e1ac11fe8e972f8e5db4bf3094d01a68e7ca | treesnapshot (tar.gz zip) |
| parent | bb37c73778ccc029d20b08d8a5df116c222ca825 | commitdiff |
Remove alignments on jump targets in memset
X86-64 memset-vec-unaligned-erms.S aligns many jump targets, which
increases code sizes, but not necessarily improve performance. As
memset benchtest data of align vs no align on various Intel and AMD
processors
https://sourceware.org/bugzilla/attachment.cgi?id=9277
shows that aligning jump targets isn't necessary.
[BZ #20115]
* sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S (__memset):
Remove alignments on jump targets.
X86-64 memset-vec-unaligned-erms.S aligns many jump targets, which
increases code sizes, but not necessarily improve performance. As
memset benchtest data of align vs no align on various Intel and AMD
processors
https://sourceware.org/bugzilla/attachment.cgi?id=9277
shows that aligning jump targets isn't necessary.
[BZ #20115]
* sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S (__memset):
Remove alignments on jump targets.
| ChangeLog | diffblobblamehistory | |
| sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S | diffblobblamehistory |