75 lines
1.3 KiB
C
Executable File
75 lines
1.3 KiB
C
Executable File
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
|
|
void *memset(void *s, int c, size_t count)
|
|
{
|
|
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;
|
|
#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
|
|
for (; temp; temp--)
|
|
*ls++ = c;
|
|
#else
|
|
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));
|
|
#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);
|