| /* $NetBSD: byte_swap.h,v 1.10 2006/01/30 22:46:36 dsl Exp $ */ | |
| /*- | |
| * Copyright (c) 1998 The NetBSD Foundation, Inc. | |
| * All rights reserved. | |
| * | |
| * This code is derived from software contributed to The NetBSD Foundation | |
| * by Charles M. Hannum. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions | |
| * are met: | |
| * 1. Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * 3. All advertising materials mentioning features or use of this software | |
| * must display the following acknowledgement: | |
| * This product includes software developed by the NetBSD | |
| * Foundation, Inc. and its contributors. | |
| * 4. Neither the name of The NetBSD Foundation nor the names of its | |
| * contributors may be used to endorse or promote products derived | |
| * from this software without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | |
| * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| * POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| #ifndef _I386_BYTE_SWAP_H_ | |
| #define _I386_BYTE_SWAP_H_ | |
| #include <sys/types.h> | |
| #if defined(_KERNEL_OPT) | |
| #include "opt_cputype.h" | |
| #endif | |
| #ifdef __GNUC__ | |
| #include <sys/types.h> | |
| __BEGIN_DECLS | |
| #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable | |
| static __inline uint32_t __byte_swap_u32_variable(uint32_t); | |
| static __inline uint32_t | |
| __byte_swap_u32_variable(uint32_t x) | |
| { | |
| __asm volatile ( | |
| #if defined(_KERNEL) && !defined(_LKM) && !defined(I386_CPU) | |
| "bswap %1" | |
| #else | |
| "rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" | |
| #endif | |
| : "=r" (x) : "0" (x)); | |
| return (x); | |
| } | |
| #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable | |
| static __inline uint16_t __byte_swap_u16_variable(uint16_t); | |
| static __inline uint16_t | |
| __byte_swap_u16_variable(uint16_t x) | |
| { | |
| __asm volatile ("rorw $8, %w1" : "=r" (x) : "0" (x)); | |
| return (x); | |
| } | |
| __END_DECLS | |
| #endif | |
| #endif /* !_I386_BYTE_SWAP_H_ */ |