lib/libc/arch/x86_64/stdlib/labs.S

   1 /*      $NetBSD: labs.S,v 1.3 2014/05/22 15:01:56 uebayasi Exp $        */
   2
   3 /*
   4  * Written by Frank van der Linden (fvdl@wasabisystems.com)
   5  * Public Domain.
   6  */
   7
   8 #include <machine/asm.h>
   9
  10 #if defined(LIBC_SCCS)
  11         RCSID("$NetBSD: labs.S,v 1.3 2014/05/22 15:01:56 uebayasi Exp $")
  12 #endif
  13
  14 #ifdef WEAK_ALIAS
  15 WEAK_ALIAS(imaxabs, _llabs)
  16 WEAK_ALIAS(llabs, _llabs)
  17 WEAK_ALIAS(labs, _labs)
  18 #endif
  19
  20 #ifdef WEAK_ALIAS
  21 ENTRY(_llabs)
  22 ENTRY(_labs)
  23 #else
  24 ENTRY(llabs)
  25 ENTRY(labs)
  26 #endif
  27         movq    %rdi,%rax
  28         testq   %rax,%rax
  29         jns     1f
  30         negq    %rax
  31 1:      ret
  32 #ifdef WEAK_ALIAS
  33 END(_llabs)
  34 END(_labs)
  35 #else
  36 END(llabs)
  37 END(labs)
  38 #endif