byte_swap.h revision 1.4
11.4Sdsl/* $NetBSD: byte_swap.h,v 1.4 2006/01/30 22:46:35 dsl Exp $ */ 21.1Sfvdl 31.1Sfvdl/*- 41.1Sfvdl * Copyright (c) 1998 The NetBSD Foundation, Inc. 51.1Sfvdl * All rights reserved. 61.1Sfvdl * 71.1Sfvdl * This code is derived from software contributed to The NetBSD Foundation 81.1Sfvdl * by Charles M. Hannum. 91.1Sfvdl * 101.1Sfvdl * Redistribution and use in source and binary forms, with or without 111.1Sfvdl * modification, are permitted provided that the following conditions 121.1Sfvdl * are met: 131.1Sfvdl * 1. Redistributions of source code must retain the above copyright 141.1Sfvdl * notice, this list of conditions and the following disclaimer. 151.1Sfvdl * 2. Redistributions in binary form must reproduce the above copyright 161.1Sfvdl * notice, this list of conditions and the following disclaimer in the 171.1Sfvdl * documentation and/or other materials provided with the distribution. 181.1Sfvdl * 3. All advertising materials mentioning features or use of this software 191.1Sfvdl * must display the following acknowledgement: 201.1Sfvdl * This product includes software developed by the NetBSD 211.1Sfvdl * Foundation, Inc. and its contributors. 221.1Sfvdl * 4. Neither the name of The NetBSD Foundation nor the names of its 231.1Sfvdl * contributors may be used to endorse or promote products derived 241.1Sfvdl * from this software without specific prior written permission. 251.1Sfvdl * 261.1Sfvdl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 271.1Sfvdl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 281.1Sfvdl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 291.1Sfvdl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 301.1Sfvdl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 311.1Sfvdl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 321.1Sfvdl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 331.1Sfvdl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 341.1Sfvdl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 351.1Sfvdl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 361.1Sfvdl * POSSIBILITY OF SUCH DAMAGE. 371.1Sfvdl */ 381.1Sfvdl 391.1Sfvdl/* 401.1Sfvdl * Copy of the i386 version. 64 bit versions may be added later. 411.1Sfvdl */ 421.1Sfvdl 431.1Sfvdl#ifndef _AMD64_BYTE_SWAP_H_ 441.1Sfvdl#define _AMD64_BYTE_SWAP_H_ 451.1Sfvdl 461.4Sdsl#ifdef __GNUC__ 471.1Sfvdl#include <sys/types.h> 481.4Sdsl__BEGIN_DECLS 491.1Sfvdl 501.4Sdsl#define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable 511.4Sdslstatic __inline uint32_t __byte_swap_u32_variable(uint32_t); 521.4Sdslstatic __inline uint32_t 531.4Sdsl__byte_swap_u32_variable(uint32_t x) 541.1Sfvdl{ 551.2Sperry __asm volatile ( "bswap %1" : "=r" (x) : "0" (x)); 561.1Sfvdl return (x); 571.1Sfvdl} 581.1Sfvdl 591.4Sdsl#define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable 601.4Sdslstatic __inline uint16_t __byte_swap_u16_variable(uint16_t); 611.4Sdslstatic __inline uint16_t 621.4Sdsl__byte_swap_u16_variable(uint16_t x) 631.1Sfvdl{ 641.2Sperry __asm volatile ("rorw $8, %w1" : "=r" (x) : "0" (x)); 651.1Sfvdl return (x); 661.1Sfvdl} 671.1Sfvdl 681.4Sdsl__END_DECLS 691.4Sdsl#endif 701.1Sfvdl 711.1Sfvdl#endif /* !_AMD64_BYTE_SWAP_H_ */ 72