1 /* $NetBSD: byte_swap.h,v 1.5 2005/12/28 18:40:13 perry Exp $ */ 2 3 /* $OpenBSD: endian.h,v 1.7 2001/06/29 20:28:54 mickey Exp $ */ 4 5 /* 6 * Copyright (c) 1998-2001 Michael Shalayeff 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Michael Shalayeff. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #ifndef _HPPA_BYTE_SWAP_H_ 36 #define _HPPA_BYTE_SWAP_H_ 37 38 static __inline u_int16_t __byte_swap_word __P((u_int16_t)); 39 static __inline u_int32_t __byte_swap_long __P((u_int32_t)); 40 41 static __inline u_int32_t 42 __byte_swap_long(u_int32_t x) 43 { 44 register in_addr_t __swap32md_x; \ 45 \ 46 __asm ("extru %1, 7,8,%%r22\n\t" \ 47 "shd %1,%1,8,%0\n\t" \ 48 "dep %0,15,8,%0\n\t" \ 49 "dep %%r22,31,8,%0" \ 50 : "=&r" (__swap32md_x) \ 51 : "r" (x) : "r22"); \ 52 return(__swap32md_x); 53 } 54 55 #if 0 56 /* 57 * Use generic C version because w/ asm __inline below 58 * gcc inserts extra "extru r,31,16,r" to convert 59 * to 16 bit entity, which produces overhead we don't need. 60 * Besides, gcc does swap16 same way by itself. 61 */ 62 #define __swap16md(x) __swap16gen(x) 63 #else 64 static __inline u_int16_t 65 __byte_swap_word(u_int16_t x) 66 { 67 register in_port_t __swap16md_x; \ 68 \ 69 __asm ("extru %1,23,8,%0\n\t" \ 70 "dep %1,23,8,%0" \ 71 : "=&r" (__swap16md_x) : "r" (x)); \ 72 return(__swap16md_x); 73 } 74 #endif 75 76 #endif /* !_HPPA_BYTE_SWAP_H_ */ 77