diff options
| author | Ondřej Bílka <neleai@seznam.cz> | 2013-12-14 19:33:56 +0100 |
|---|---|---|
| committer | Ondřej Bílka <neleai@seznam.cz> | 2013-12-14 20:08:13 +0100 |
| commit | 584b18eb4df61ccd447db2dfe8c8a7901f8c8598 (patch) | |
| tree | 8240dbf408eadda74685f951e36f8885f77c2f77 /ChangeLog | |
| parent | 8a5c7897dd1c52ca74b06aaf5a3bacf0919c97aa (diff) | |
Add strstr with unaligned loads. Fixes bug 12100.
A sse42 version of strstr used pcmpistr instruction which is quite
ineffective. A faster way is look for pairs of characters which is uses
sse2, is faster than pcmpistr and for real strings a pairs we look for
are relatively rare.
For linear time complexity we use buy or rent technique which switches
to two-way algorithm when superlinear behaviour is detected.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -1,3 +1,17 @@ +2013-12-14 Ondřej Bílka <neleai@seznam.cz> + + [BZ #12100] + * sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S: New file + * sysdeps/x86_64/multiarch/strstr-c.c: Moved to ... + * sysdeps/x86_64/multiarch/strstr.c: ... here. + (strstr): Add __strstr_sse2_unaligned ifunc. + * sysdeps/x86_64/multiarch/strcasestr-c.c: Moved to ... + * sysdeps/x86_64/multiarch/strcasestr.c ... here. + (strcasestr): Remove __strcasestr_sse42 ifunc. + * sysdeps/x86_64/multiarch/strcasestr-nonascii.c: Remove. + * sysdeps/x86_64/multiarch/ifunc-impl-list.c: Update. + * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Update. + 2013-12-14 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/sh/sh4/fpu/bits/fenv.h: Move to ... |