1 /* $NetBSD: byte_swap.h,v 1.8 2009/04/30 07:01:27 skrll Exp $ */ 2 3 /* $OpenBSD: endian.h,v 1.8 2004/04/07 18:24:19 mickey Exp $ */ 4 5 /* 6 * Copyright (c) 1998-2004 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef _HPPA_BYTE_SWAP_H_ 32 #define _HPPA_BYTE_SWAP_H_ 33 34 #ifdef __GNUC__ 35 #include <sys/types.h> 36 __BEGIN_DECLS 37 38 39 #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable 40 static __inline uint32_t __byte_swap_u32_variable(uint32_t); 41 static __inline uint32_t 42 __byte_swap_u32_variable(uint32_t x) 43 { 44 register uint32_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 #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable 65 static __inline uint16_t __byte_swap_u16_variable(uint16_t); 66 static __inline uint16_t 67 __byte_swap_u16_variable(uint16_t x) 68 { 69 register uint16_t __swap16md_x; \ 70 \ 71 __asm ("extru %1,23,8,%0\n\t" \ 72 "dep %1,23,8,%0" \ 73 : "=&r" (__swap16md_x) : "r" (x)); \ 74 return(__swap16md_x); 75 } 76 #endif 77 78 __END_DECLS 79 #endif 80 81 #endif /* !_HPPA_BYTE_SWAP_H_ */ 82