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| author | Ondrej Bilka <neleai@seznam.cz> | 2013-05-20 08:26:00 +0200 |
|---|---|---|
| committer | Ondrej Bilka <neleai@seznam.cz> | 2013-05-20 08:32:45 +0200 |
| commit | b2b671b677d92429a3d41bf451668f476aa267ed (patch) | |
| tree | a211523045be91beb43abbf7ebacb7a74ddb8adc /ChangeLog | |
| parent | 2d48b41c8fa610067c4d664ac2339ae6ca43e78c (diff) | |
| download | glibc-b2b671b677d92429a3d41bf451668f476aa267ed.zip glibc-b2b671b677d92429a3d41bf451668f476aa267ed.tar.gz glibc-b2b671b677d92429a3d41bf451668f476aa267ed.tar.bz2 | |
Faster memset on x64
This implementation speed up memset in several ways. First is avoiding
expensive computed jump. Second is using fact that arguments of memset
are most of time aligned to 8 bytes.
Benchmark results on:
kam.mff.cuni.cz/~ondra/benchmark_string/memset_profile_result27_04_13.tar.bz2
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -1,5 +1,11 @@ 2013-05-20 Ondřej Bílka <neleai@seznam.cz> + * sysdeps/x86_64/memset.S (memset): New implementation. + (__bzero): Likewise. + (__memset_tail): New function. + +2013-05-20 Ondřej Bílka <neleai@seznam.cz> + * sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: New file. * sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Add __memcpy_sse2_unaligned ifunc selection. |