[U-Boot] [PATCH 1/3] memcpy: use 32-bit copies if possible

[Alessandro Rubini]

From: Alessandro Rubini <rubini at unipv.it>

Signed-off-by: Alessandro Rubini <rubini at unipv.it>
Acked-by: Andrea Gallo <andrea.gallo at stericsson.com>
---
 lib_generic/string.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/lib_generic/string.c b/lib_generic/string.c
index 181eda6..fdccab6 100644
--- a/lib_generic/string.c
+++ b/lib_generic/string.c
@@ -449,7 +449,16 @@ char * bcopy(const char * src, char * dest, int count)
 void * memcpy(void * dest,const void *src,size_t count)
 {
 	char *tmp = (char *) dest, *s = (char *) src;
+	u32 *d32 = (u32 *)dest, *s32 = (u32 *) src;
 
+	/* if both are aligned, use 32-bit copy */
+	if ( (((int)dest & 3) | ((int)src & 3) | (count & 3)) == 0 ) {
+		count /= 4;
+		while (count--)
+			*d32++ = *s32++;
+		return dest;
+	}
+	/* else, use 1-byte copy */
 	while (count--)
 		*tmp++ = *s++;
 
 -- 
1.5.6.5