arch/sparc/lib/strncmp_64.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Sparc64 optimized strncmp code.
   4  *
   5  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  */
   7
   8 #include <linux/linkage.h>
   9 #include <asm/asi.h>
  10 #include <asm/export.h>
  11
  12         .text
  13 ENTRY(strncmp)
  14         brlez,pn %o2, 3f
  15          lduba  [%o0] (ASI_PNF), %o3
  16 1:
  17         add     %o0, 1, %o0
  18         ldub    [%o1], %o4
  19         brz,pn  %o3, 2f
  20          add    %o1, 1, %o1
  21         cmp     %o3, %o4
  22         bne,pn  %icc, 2f
  23          subcc  %o2, 1, %o2
  24         bne,a,pt %xcc, 1b
  25          ldub   [%o0], %o3
  26 2:
  27         retl
  28          sub    %o3, %o4, %o0
  29 3:
  30         retl
  31          clr    %o0
  32 ENDPROC(strncmp)
  33 EXPORT_SYMBOL(strncmp)