Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / m68knommu / lib / memmove.c

diff --git a/arch/m68knommu/lib/memmove.c b/arch/m68knommu/lib/memmove.c
new file mode 100644 (file)
index 0000000..b3dcfe9
--- /dev/null
+++ b/arch/m68knommu/lib/memmove.c
@@ -0,0 +1,105 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#define __IN_STRING_C
+
+#include <linux/module.h>
+#include <linux/string.h>
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+       void *xdest = dest;
+       size_t temp;
+
+       if (!n)
+               return xdest;
+
+       if (dest < src) {
+               if ((long)dest & 1) {
+                       char *cdest = dest;
+                       const char *csrc = src;
+                       *cdest++ = *csrc++;
+                       dest = cdest;
+                       src = csrc;
+                       n--;
+               }
+               if (n > 2 && (long)dest & 2) {
+                       short *sdest = dest;
+                       const short *ssrc = src;
+                       *sdest++ = *ssrc++;
+                       dest = sdest;
+                       src = ssrc;
+                       n -= 2;
+               }
+               temp = n >> 2;
+               if (temp) {
+                       long *ldest = dest;
+                       const long *lsrc = src;
+                       temp--;
+                       do
+                               *ldest++ = *lsrc++;
+                       while (temp--);
+                       dest = ldest;
+                       src = lsrc;
+               }
+               if (n & 2) {
+                       short *sdest = dest;
+                       const short *ssrc = src;
+                       *sdest++ = *ssrc++;
+                       dest = sdest;
+                       src = ssrc;
+               }
+               if (n & 1) {
+                       char *cdest = dest;
+                       const char *csrc = src;
+                       *cdest = *csrc;
+               }
+       } else {
+               dest = (char *)dest + n;
+               src = (const char *)src + n;
+               if ((long)dest & 1) {
+                       char *cdest = dest;
+                       const char *csrc = src;
+                       *--cdest = *--csrc;
+                       dest = cdest;
+                       src = csrc;
+                       n--;
+               }
+               if (n > 2 && (long)dest & 2) {
+                       short *sdest = dest;
+                       const short *ssrc = src;
+                       *--sdest = *--ssrc;
+                       dest = sdest;
+                       src = ssrc;
+                       n -= 2;
+               }
+               temp = n >> 2;
+               if (temp) {
+                       long *ldest = dest;
+                       const long *lsrc = src;
+                       temp--;
+                       do
+                               *--ldest = *--lsrc;
+                       while (temp--);
+                       dest = ldest;
+                       src = lsrc;
+               }
+               if (n & 2) {
+                       short *sdest = dest;
+                       const short *ssrc = src;
+                       *--sdest = *--ssrc;
+                       dest = sdest;
+                       src = ssrc;
+               }
+               if (n & 1) {
+                       char *cdest = dest;
+                       const char *csrc = src;
+                       *--cdest = *--csrc;
+               }
+       }
+       return xdest;
+}
+EXPORT_SYMBOL(memmove);