1 /* $NetBSD: byte_swap.h,v 1.7 2006/02/03 22:05:21 dsl 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 #ifdef __GNUC__ 39 #include <sys/types.h> 40 __BEGIN_DECLS 41 42 43 #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable 44 static __inline uint32_t __byte_swap_u32_variable(uint32_t); 45 static __inline uint32_t 46 __byte_swap_u32_variable(uint32_t x) 47 { 48 register uint32_t __swap32md_x; \ 49 \ 50 __asm ("extru %1, 7,8,%%r22\n\t" \ 51 "shd %1,%1,8,%0\n\t" \ 52 "dep %0,15,8,%0\n\t" \ 53 "dep %%r22,31,8,%0" \ 54 : "=&r" (__swap32md_x) \ 55 : "r" (x) : "r22"); \ 56 return(__swap32md_x); 57 } 58 59 #if 0 60 /* 61 * Use generic C version because w/ asm __inline below 62 * gcc inserts extra "extru r,31,16,r" to convert 63 * to 16 bit entity, which produces overhead we don't need. 64 * Besides, gcc does swap16 same way by itself. 65 */ 66 #define __swap16md(x) __swap16gen(x) 67 #else 68 #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable 69 static __inline uint16_t __byte_swap_u16_variable(uint16_t); 70 static __inline uint16_t 71 __byte_swap_u16_variable(uint16_t x) 72 { 73 register uint16_t __swap16md_x; \ 74 \ 75 __asm ("extru %1,23,8,%0\n\t" \ 76 "dep %1,23,8,%0" \ 77 : "=&r" (__swap16md_x) : "r" (x)); \ 78 return(__swap16md_x); 79 } 80 #endif 81 82 __END_DECLS 83 #endif 84 85 #endif /* !_HPPA_BYTE_SWAP_H_ */ 86