/* $NetBSD: byte_swap.h,v 1.7 2006/02/03 22:05:21 dsl Exp $ */ /* $OpenBSD: endian.h,v 1.7 2001/06/29 20:28:54 mickey Exp $ */ /* * Copyright (c) 1998-2001 Michael Shalayeff * All rights reserved. * * 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 Michael Shalayeff. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _HPPA_BYTE_SWAP_H_ #define _HPPA_BYTE_SWAP_H_ #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) { register uint32_t __swap32md_x; \ \ __asm ("extru %1, 7,8,%%r22\n\t" \ "shd %1,%1,8,%0\n\t" \ "dep %0,15,8,%0\n\t" \ "dep %%r22,31,8,%0" \ : "=&r" (__swap32md_x) \ : "r" (x) : "r22"); \ return(__swap32md_x); } #if 0 /* * Use generic C version because w/ asm __inline below * gcc inserts extra "extru r,31,16,r" to convert * to 16 bit entity, which produces overhead we don't need. * Besides, gcc does swap16 same way by itself. */ #define __swap16md(x) __swap16gen(x) #else #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) { register uint16_t __swap16md_x; \ \ __asm ("extru %1,23,8,%0\n\t" \ "dep %1,23,8,%0" \ : "=&r" (__swap16md_x) : "r" (x)); \ return(__swap16md_x); } #endif __END_DECLS #endif #endif /* !_HPPA_BYTE_SWAP_H_ */