/* * 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);