arch/sparc/lib/memcmp.S

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