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 <s...@chromium.org>
---
Changes in v4: None
Changes in v3: None
lib/string.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/lib/string.c b/lib/string.c
index 67d5f6a4213..6a75efb180b 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -509,16 +509,9 @@ 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--)
--
2.11.0.483.g087da7b7c-goog
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