root/arch/sh/lib/memchr.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* $Id: memchr.S,v 1.1 2000/04/14 16:49:01 mjd Exp $
   3  *
   4  * "memchr" implementation of SuperH
   5  *
   6  * Copyright (C) 1999  Niibe Yutaka
   7  *
   8  */
   9 
  10 /*
  11  * void *memchr(const void *s, int c, size_t n);
  12  */
  13 
  14 #include <linux/linkage.h>
  15 ENTRY(memchr)
  16         tst     r6,r6
  17         bt/s    2f
  18          exts.b r5,r5
  19 1:      mov.b   @r4,r1
  20         cmp/eq  r1,r5
  21         bt/s    3f
  22          dt     r6
  23         bf/s    1b
  24          add    #1,r4
  25 2:      mov     #0,r4
  26 3:      rts
  27          mov    r4,r0