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| /*
| * 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);
|
|
