glibc/sysdeps/i386/htons.S

/* Change byte order in word.  For Intel 80x86, x >= 3.
   Copyright (C) 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdep.h>
#include "asm-syntax.h"

/*
   INPUT PARAMETERS:
   word		(sp + 4)
*/

	.text
ENTRY (__htons)
	movl	4(%esp), %eax
	andl	$0xffff, %eax
	rorw	$8, %ax
	ret
END (__htons)

strong_alias (__htons, __ntohs)
weak_alias (__htons, htons)
weak_alias (__ntohs, ntohs)