| /* |
| * 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); |
