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| 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 /include/dirent.h | |
| parent | 8a5c7897dd1c52ca74b06aaf5a3bacf0919c97aa (diff) | |
| download | glibc-584b18eb4df61ccd447db2dfe8c8a7901f8c8598.zip glibc-584b18eb4df61ccd447db2dfe8c8a7901f8c8598.tar.gz glibc-584b18eb4df61ccd447db2dfe8c8a7901f8c8598.tar.bz2 | |
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 'include/dirent.h')
0 files changed, 0 insertions, 0 deletions