sysdeps/i386/htons.S

   1 /* Change byte order in word.  For Intel 80x86, x >= 3.
   2    Copyright (C) 1997-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include "asm-syntax.h"
  21
  22 /*
  23    INPUT PARAMETERS:
  24    word         (sp + 4)
  25 */
  26
  27         .text
  28 ENTRY (htons)
  29         movl    4(%esp), %eax
  30         andl    $0xffff, %eax
  31         rorw    $8, %ax
  32         ret
  33 END (htons)
  34
  35 weak_alias (htons, ntohs)