BootX-46.tar.gz

[apple/bootx.git] / bootx.tproj / libclite.subproj / bswap.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *  bswap.c - Endian Swapping functions.
 *
 *  Copyright (c) 2000 Apple Computer, Inc.
 *
 *  DRI: Josh de Cesare
 */

#include <libclite.h>

int16_t bswap16(int16_t data)
{
  int16_t tmpData;
  
  __asm__ volatile("sthbrx %0, 0, %1" : : "r" (data), "r" (&tmpData));
  
  return tmpData;
}

int32_t bswap32(int32_t data)
{
  int32_t tmpData;
  
  __asm__ volatile("stwbrx %0, 0, %1" : : "r" (data), "r" (&tmpData));
  
  return tmpData;
}