Changeset 7a255e69 in mainline

Timestamp:

2006-02-26T11:58:27Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7cb53f62

Parents:

a0c732e

Message:

Improved version of generic memcpy().
Should improve frame buffer impression.

File:

• generic/src/lib/memstr.c (modified) (2 diffs)

generic/src/lib/memstr.c

@@ -30 +30 @@
 #include <arch/types.h>
 
-
 /** Copy block of memory
  *
  * Copy cnt bytes from src address to dst address.
- * The copying is done byte-by-byte. The source
- * and destination memory areas cannot overlap.
+ * The copying is done word-by-word and then byte-by-byte.
+ * The source and destination memory areas cannot overlap.
  *
  * @param src Origin address to copy from.
@@ -44 +43 @@
 void *_memcpy(void * dst, const void *src, size_t cnt)
 {
-        int i;
+        int i, j;
         
-        for (i=0; i<cnt; i++)
-                *((__u8 *) (dst + i)) = *((__u8 *) (src + i));
+        for (i = 0; i < cnt/sizeof(__native); i++)
+                ((__native *) dst)[i] = ((__native *) src)[i];
+                
+        for (j = 0; j < cnt%sizeof(__native); j++)
+                ((__u8 *)(((__native *) dst) + i))[j] = ((__u8 *)(((__native *) src) + i))[j];
                 
         return (char *)src;