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Greg Ungerer
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May 24, 2011
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--- | ||
refs/heads/master: 80160de89d0a7c9a93dfe91eef2b448cbc380cd0 | ||
refs/heads/master: d10ed2f5383cc6e6b7649f03540b8cb1838d5f67 |
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@@ -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); |
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