1 /* $OpenBSD: endian.h,v 1.7 2001/06/29 20:28:54 mickey Exp $ */ 2 3 /* 4 * Copyright (c) 1998-2001 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Michael Shalayeff. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _MACHINE_ENDIAN_H_ 34 #define _MACHINE_ENDIAN_H_ 35 36 #ifdef __GNUC__ 37 38 #define __swap64md(x) ({ \ 39 u_int64_t __swap64md_x = (x); \ 40 \ 41 (u_int64_t)__swap32md(__swap64md_x >> 32) | \ 42 (u_int64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \ 43 }) 44 45 #define __swap32md(x) ({ \ 46 register u_int32_t __swap32md_x; \ 47 \ 48 __asm ("extru %1, 7,8,%%r19\n\t" \ 49 "shd %1,%1,8,%0\n\t" \ 50 "dep %0,15,8,%0\n\t" \ 51 "dep %%r19,31,8,%0" \ 52 : "=&r" (__swap32md_x) \ 53 : "r" (x) : "r19"); \ 54 __swap32md_x; \ 55 }) 56 57 #if 1 58 /* 59 * Use generic C version because w/ asm inline below 60 * gcc inserts extra "extru r,31,16,r" to convert 61 * to 16 bit entity, which produces overhead we don't need. 62 * Besides, gcc does swap16 same way by itself. 63 */ 64 #define __swap16md(x) __swap16gen(x) 65 #else 66 #define __swap16md(x) ({ \ 67 register u_int16_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 __swap16md_x; \ 73 }) 74 #endif 75 76 #define __swap64md(x) ({ \ 77 u_int64_t __swap64md_x = (x); \ 78 \ 79 (u_int64_t)__swap32md(__swap64md_x >> 32) | \ 80 (u_int64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \ 81 }) 82 83 /* Tell sys/endian.h we have MD variants of the swap macros. */ 84 #define MD_SWAP 85 86 #endif /* __GNUC__ */ 87 88 89 #define BYTE_ORDER BIG_ENDIAN 90 #include <sys/endian.h> 91 92 #define __STRICT_ALIGNMENT 93 94 #endif /* !_MACHINE_ENDIAN_H_ */ 95