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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2015-08-05 15:58:15 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2015-08-05 16:24:04 +0100 |
| commit | 05a910f7b420c2b831f35ba90e61c80f001c0606 (patch) | |
| tree | ea10fa59974d0e2e3b5f43d490aca37bc2b787ad /string | |
| parent | f29ac72effae859140bb0d7fffdb1e6cef0ffed0 (diff) | |
| download | glibc-05a910f7b420c2b831f35ba90e61c80f001c0606.zip glibc-05a910f7b420c2b831f35ba90e61c80f001c0606.tar.gz glibc-05a910f7b420c2b831f35ba90e61c80f001c0606.tar.bz2 | |
Improve performance of mempcpy by inlining and using memcpy. Enable
this for all targets except sparc which has an optimized mempcpy
implementation.
Diffstat (limited to 'string')
| -rw-r--r-- | string/string.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/string/string.h b/string/string.h index 54a4d39..3ab7103 100644 --- a/string/string.h +++ b/string/string.h @@ -636,6 +636,25 @@ extern char *basename (const char *__filename) __THROW __nonnull ((1)); # endif #endif +#if defined __USE_GNU && defined __OPTIMIZE__ \ + && defined __extern_always_inline && __GNUC_PREREQ (3,2) +# if !defined _FORCE_INLINES && !defined _HAVE_STRING_ARCH_mempcpy + +#undef mempcpy +#undef __mempcpy +#define mempcpy(dest, src, n) __mempcpy_inline (dest, src, n) +#define __mempcpy(dest, src, n) __mempcpy_inline (dest, src, n) + +__extern_always_inline void * +__mempcpy_inline (void *__restrict __dest, + const void *__restrict __src, size_t __n) +{ + return (char *) memcpy (__dest, __src, __n) + __n; +} + +# endif +#endif + __END_DECLS #endif /* string.h */ |