arch/sparc64/lib/memcmp.S

   1 /*
   2  * Sparc64 optimized memcmp code.
   3  *
   4  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 2000 David S. Miller (davem@redhat.com)
   6  */
   7
   8         .text
   9         .align  32
  10         .globl  __memcmp, memcmp
  11 __memcmp:
  12 memcmp:
  13         cmp     %o2, 0          ! IEU1  Group
  14 loop:   be,pn   %icc, ret_0     ! CTI
  15          nop                    ! IEU0
  16         ldub    [%o0], %g7      ! LSU   Group
  17         ldub    [%o1], %g3      ! LSU   Group
  18         sub     %o2, 1, %o2     ! IEU0
  19         add     %o0, 1, %o0     ! IEU1
  20         add     %o1, 1, %o1     ! IEU0  Group
  21         subcc   %g7, %g3, %g3   ! IEU1  Group
  22         be,pt   %icc, loop      ! CTI
  23          cmp    %o2, 0          ! IEU1  Group
  24
  25 ret_n0: retl
  26          mov    %g3, %o0
  27 ret_0:  retl
  28          mov    0, %o0