[PATCH] m68k: cleanup inline mem functions
Use the builtin functions for memset/memclr/memcpy, special optimizations for
page operations have dedicated functions now. Uninline memmove/memchr and
move all functions into a single file and clean it up a little.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/m68k/lib/string.c b/arch/m68k/lib/string.c
new file mode 100644
index 0000000..b92b89e
--- /dev/null
+++ b/arch/m68k/lib/string.c
@@ -0,0 +1,237 @@
+
+#include <linux/types.h>
+#include <linux/module.h>
+
+void *memset(void *s, int c, size_t count)
+{
+ void *xs = s;
+ size_t temp, temp1;
+
+ 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;
+
+ 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));
+ 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);
+
+void *memcpy(void *to, const void *from, size_t n)
+{
+ void *xto = to;
+ size_t temp, temp1;
+
+ if (!n)
+ return xto;
+ if ((long)to & 1) {
+ char *cto = to;
+ const char *cfrom = from;
+ *cto++ = *cfrom++;
+ to = cto;
+ from = cfrom;
+ n--;
+ }
+ if (n > 2 && (long)to & 2) {
+ short *sto = to;
+ const short *sfrom = from;
+ *sto++ = *sfrom++;
+ to = sto;
+ from = sfrom;
+ n -= 2;
+ }
+ temp = n >> 2;
+ if (temp) {
+ long *lto = to;
+ const long *lfrom = from;
+
+ asm volatile (
+ " movel %2,%3\n"
+ " andw #7,%3\n"
+ " lsrl #3,%2\n"
+ " negw %3\n"
+ " jmp %%pc@(1f,%3:w:2)\n"
+ "4: movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ " movel %0@+,%1@+\n"
+ "1: dbra %2,4b\n"
+ " clrw %2\n"
+ " subql #1,%2\n"
+ " jpl 4b"
+ : "=a" (lfrom), "=a" (lto), "=d" (temp), "=&d" (temp1)
+ : "0" (lfrom), "1" (lto), "2" (temp));
+ to = lto;
+ from = lfrom;
+ }
+ if (n & 2) {
+ short *sto = to;
+ const short *sfrom = from;
+ *sto++ = *sfrom++;
+ to = sto;
+ from = sfrom;
+ }
+ if (n & 1) {
+ char *cto = to;
+ const char *cfrom = from;
+ *cto = *cfrom;
+ }
+ return xto;
+}
+EXPORT_SYMBOL(memcpy);
+
+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);
+
+int memcmp(const void *cs, const void *ct, size_t count)
+{
+ const unsigned char *su1, *su2;
+
+ for (su1 = cs, su2 = ct; count > 0; ++su1, ++su2, count--)
+ if (*su1 != *su2)
+ return *su1 < *su2 ? -1 : +1;
+ return 0;
+}
+EXPORT_SYMBOL(memcmp);