| /* | |
| * 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); |