diff options
author | Simon Glass <sjg@chromium.org> | 2017-04-05 22:23:31 (GMT) |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2017-05-10 00:19:04 (GMT) |
commit | cb0eae8cf8aaca76910dee4c7eb536d0814d1bd2 (patch) | |
tree | 8e4bb6377bcafcd626ed0bcbcdf960fad5cd1ceb | |
parent | 20b429b013c97cb3d253274003d52bbe8c9c4da1 (diff) | |
download | u-boot-fsl-qoriq-cb0eae8cf8aaca76910dee4c7eb536d0814d1bd2.tar.xz |
string: Use memcpy() within memmove() when we can
A common use of memmove() can be handled by memcpy(). Also memcpy()
includes an optimisation for large sizes: it copies a word at a time. So
we can get a speed-up by calling memcpy() to handle our move in this case.
Update memmove() to call memcpy() if the destination is before the source.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
-rw-r--r-- | lib/string.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/lib/string.c b/lib/string.c index c1a28c1..e94021c 100644 --- a/lib/string.c +++ b/lib/string.c @@ -511,16 +511,9 @@ void * memmove(void * dest,const void *src,size_t count) { char *tmp, *s; - if (src == dest) - return dest; - if (dest <= src) { - tmp = (char *) dest; - s = (char *) src; - while (count--) - *tmp++ = *s++; - } - else { + memcpy(dest, src, count); + } else { tmp = (char *) dest + count; s = (char *) src + count; while (count--) |