m68k: remove duplicate memset() implementation

Merging the mmu and non-mmu directories we ended up with duplicate
implementations of memset(). One is a little more optimized for the
>= 68020 case, but that can easily be inserted into a single
implementation of memset(). Clean up the exporting of this symbol
too, otherwise we end up exporting it twice on a no-mmu build.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 71 insertions, 43 deletions

diff --git a/arch/m68k/lib/memset.c b/arch/m68k/lib/memset.c
index 1389bf455633..f649e6a2e644 100644
--- a/arch/m68k/lib/memset.c
+++ b/arch/m68k/lib/memset.c
@@ -1,47 +1,75 @@
-#include <linux/types.h>
+/*
+ * 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.
+ */
 
-void * memset(void * s, int c, size_t count)
+#include <linux/module.h>
+#include <linux/string.h>
+
+void *memset(void *s, int c, size_t count)
 {
-  void *xs = s;
-  size_t temp;
+        void *xs = s;
+        size_t temp;
 
-  if (!count)
-    return xs;
-  c &= 0xff;
-  c |= c << 8;
-  c |= c << 16;
-  if ((long) s & 1)
-    {
-      char *cs = s;
-      *cs++ = c;
-      s = cs;
-      count--;
-    }
-  if (count > 2 && (long) s & 2)
-    {
-      short *ss = s;
-      *ss++ = c;
-      s = ss;
-      count -= 2;
-    }
-  temp = count >> 2;
-  if (temp)
-    {
-      long *ls = s;
-      for (; temp; temp--)
-        *ls++ = c;
-      s = ls;
-    }
-  if (count & 2)
-    {
-      short *ss = s;
-      *ss++ = c;
-      s = ss;
-    }
-  if (count & 1)
-    {
-      char *cs = s;
-      *cs = c;
-    }
-  return xs;
+        if (!count)
+                return xs;
+        c &= 0xff;
+        c |= c << 8;
+        c |= c << 16;
+        if ((long)s & 1) {
+                char *cs = s;
+                *cs++ = c;
+                s = cs;
+                count--;
+        }
+        if (count > 2 && (long)s & 2) {
+                short *ss = s;
+                *ss++ = c;
+                s = ss;
+                count -= 2;
+        }
+        temp = count >> 2;
+        if (temp) {
+                long *ls = s;
+#if defined(__mc68020__) || defined(__mc68030__) || \
+    defined(__mc68040__) || defined(__mc68060__) || defined(__mcpu32__)
+                size_t temp1;
+                asm volatile (
+                        "       movel %1,%2\n"
+                        "       andw  #7,%2\n"
+                        "       lsrl  #3,%1\n"
+                        "       negw  %2\n"
+                        "       jmp   %%pc@(2f,%2:w:2)\n"
+                        "1:     movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "       movel %3,%0@+\n"
+                        "2:     dbra  %1,1b\n"
+                        "       clrw  %1\n"
+                        "       subql #1,%1\n"
+                        "       jpl   1b"
+                        : "=a" (ls), "=d" (temp), "=&d" (temp1)
+                        : "d" (c), "0" (ls), "1" (temp));
+#else
+                for (; temp; temp--)
+                        *ls++ = c;
+#endif
+                s = ls;
+        }
+        if (count & 2) {
+                short *ss = s;
+                *ss++ = c;
+                s = ss;
+        }
+        if (count & 1) {
+                char *cs = s;
+                *cs = c;
+        }
+        return xs;
 }
+EXPORT_SYMBOL(memset);