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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/mvs/machine/endian.h |
/*- * Copyright (c) 1987, 1991 Regents of the University of California. * 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. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)endian.h 7.8 (Berkeley) 4/3/91 * $FreeBSD: release/9.1.0/sys/amd64/include/endian.h 233349 2012-03-23 10:55:19Z dim $ */ #ifndef _MACHINE_ENDIAN_H_ #define _MACHINE_ENDIAN_H_ #include <sys/cdefs.h> #include <sys/_types.h> #ifdef __cplusplus extern "C" { #endif /* * Define the order of 32-bit words in 64-bit words. */ #define _QUAD_HIGHWORD 1 #define _QUAD_LOWWORD 0 /* * Definitions for byte order, according to byte significance from low * address to high. */ #define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ #define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ #define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ #define _BYTE_ORDER _LITTLE_ENDIAN /* * Deprecated variants that don't have enough underscores to be useful in more * strict namespaces. */ #if __BSD_VISIBLE #define LITTLE_ENDIAN _LITTLE_ENDIAN #define BIG_ENDIAN _BIG_ENDIAN #define PDP_ENDIAN _PDP_ENDIAN #define BYTE_ORDER _BYTE_ORDER #endif #if defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE_BUILTIN_CONSTANT_P) #define __bswap64_const(_x) \ (((_x) >> 56) | \ (((_x) >> 40) & (0xffUL << 8)) | \ (((_x) >> 24) & (0xffUL << 16)) | \ (((_x) >> 8) & (0xffUL << 24)) | \ (((_x) << 8) & (0xffUL << 32)) | \ (((_x) << 24) & (0xffUL << 40)) | \ (((_x) << 40) & (0xffUL << 48)) | \ ((_x) << 56)) #define __bswap32_const(_x) \ (((_x) >> 24) | \ (((_x) & (0xff << 16)) >> 8) | \ (((_x) & (0xff << 8)) << 8) | \ ((_x) << 24)) #define __bswap16_const(_x) (__uint16_t)((_x) << 8 | (_x) >> 8) static __inline __uint64_t __bswap64_var(__uint64_t _x) { __asm ("bswap %0" : "+r" (_x)); return (_x); } static __inline __uint32_t __bswap32_var(__uint32_t _x) { __asm ("bswap %0" : "+r" (_x)); return (_x); } static __inline __uint16_t __bswap16_var(__uint16_t _x) { return (__bswap16_const(_x)); } #define __bswap64(_x) \ (__builtin_constant_p(_x) ? \ __bswap64_const((__uint64_t)(_x)) : __bswap64_var(_x)) #define __bswap32(_x) \ (__builtin_constant_p(_x) ? \ __bswap32_const((__uint32_t)(_x)) : __bswap32_var(_x)) #define __bswap16(_x) \ ((__uint16_t)(__builtin_constant_p(_x) ? \ __bswap16_const((__uint16_t)(_x)) : __bswap16_var(_x))) #define __htonl(x) __bswap32(x) #define __htons(x) __bswap16(x) #define __ntohl(x) __bswap32(x) #define __ntohs(x) __bswap16(x) #else /* !(__GNUCLIKE_ASM && __GNUCLIKE_BUILTIN_CONSTANT_P) */ /* * No optimizations are available for this compiler. Fall back to * non-optimized functions by defining the constant usually used to prevent * redefinition. */ #define _BYTEORDER_FUNC_DEFINED #endif /* __GNUCLIKE_ASM && __GNUCLIKE_BUILTIN_CONSTANT_P */ #ifdef __cplusplus } #endif #endif /* !_MACHINE_ENDIAN_H_ */