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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2010 by Spencer Oliver                                  *
   5  *   spen@spen-soft.co.uk                                                  *
   6  ***************************************************************************/
   7
   8 /*
   9         parameters:
  10         r0 - address in
  11         r1 - byte count
  12         r2 - mask - result out
  13 */
  14
  15         .text
  16         .arm
  17
  18 loop:
  19         ldrb r3, [r0], #1
  20         and r2, r2, r3
  21         subs r1, r1, #1
  22         bne loop
  23 end:
  24         bkpt    #0
  25
  26         .end