From: Alessandro Rubini <rub...@unipv.it>
If the destination is aligned, fill ulong values until possible.
Then fill remaining part by bytes.
Signed-off-by: Alessandro Rubini <rub...@unipv.it>
Acked-by: Andrea Gallo <andrea.ga...@stericsson.com>
---
lib_generic/string.c | 22 +++++++++++++++++++---
1 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/lib_generic/string.c b/lib_generic/string.c
index 9bee79b..1575c63 100644
--- a/lib_generic/string.c
+++ b/lib_generic/string.c
@@ -403,10 +403,26 @@ char *strswab(const char *s)
*/
void * memset(void * s,int c,size_t count)
{
- char *xs = (char *) s;
-
+ unsigned long *sl = (unsigned long *) s;
+ unsigned long cl = 0;
+ char *s8;
+ int i;
+
+ /* do it one word at a time (32 bits or 64 bits) while possible */
+ if ( ((count | (ulong)s) & (sizeof(*sl) - 1)) == 0) {
+ for (i=0; i<sizeof(*sl); ++i) {
+ cl <<= 8;
+ cl |= c & 0xff;
+ }
+ while (count >= sizeof(*sl)) {
+ *sl++ = cl;
+ count -= sizeof(*sl);
+ }
+ }
+ /* fill 8 bits at a time */
+ s8 = (char *)sl;
while (count--)
- *xs++ = c;
+ *s8++ = c;
return s;
}
--
1.5.6.5
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