Changeset 5d9fce4 in mainline

Timestamp:

2013-03-27T17:16:46Z (11 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

26c02b22, c6a7b3a

Parents:

5c4356b

Message:

using builtin_memcpy() and builtin_memset() actually emits calls to memcpy() and memset()
if the size argument cannot be determined at compile time

File:

• boot/generic/src/memstr.c (modified) (3 diffs)

boot/generic/src/memstr.c

@@ -30 +30 @@
 #include <typedefs.h>
 
-/** Copy block of memory.
+/** Move memory block without overlapping.
  *
- * Copy cnt bytes from src address to dst address.The source and destination
- * memory areas cannot overlap.
+ * Copy cnt bytes from src address to dst address. The source
+ * and destination memory areas cannot overlap.
  *
+ * @param dst Destination address to copy to.
  * @param src Source address to copy from.
- * @param dst Destination address to copy to.
  * @param cnt Number of bytes to copy.
  *
@@ -44 +44 @@
 void *memcpy(void *dst, const void *src, size_t cnt)
 {
-        return __builtin_memcpy(dst, src, cnt);
+        uint8_t *dp = (uint8_t *) dst;
+        const uint8_t *sp = (uint8_t *) src;
+        
+        while (cnt-- != 0)
+                *dp++ = *sp++;
+        
+        return dst;
 }
 
@@ -60 +66 @@
 void *memset(void *dst, int val, size_t cnt)
 {
-        return __builtin_memset(dst, val, cnt);
+        uint8_t *dp = (uint8_t *) dst;
+        
+        while (cnt-- != 0)
+                *dp++ = val;
+        
+        return dst;
 }