arch/sparc/lib/memcmp.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Sparc optimized memcmp code.
   3  *
   4  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 2000, 2008 David S. Miller (davem@davemloft.net)
   6  */
   7
   8 #include <linux/linkage.h>
   9 #include <asm/asm.h>
  10 #include <asm/export.h>
  11
  12         .text
  13 ENTRY(memcmp)
  14         cmp     %o2, 0
  15 1:      BRANCH32(be, pn, 2f)
  16          nop
  17         ldub    [%o0], %g7
  18         ldub    [%o1], %g3
  19         sub     %o2, 1, %o2
  20         add     %o0, 1, %o0
  21         add     %o1, 1, %o1
  22         subcc   %g7, %g3, %g3
  23         BRANCH32(be, pt, 1b)
  24          cmp    %o2, 0
  25         retl
  26          mov    %g3, %o0
  27 2:      retl
  28          mov    0, %o0
  29 ENDPROC(memcmp)
  30 EXPORT_SYMBOL(memcmp)