| /*- |
| * 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 |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _BSD_MACHINE_ENDIAN_H_ |
| #define _BSD_MACHINE_ENDIAN_H_ |
| |
| #include <sys/bsd_cdefs.h> |
| #include <sys/bsd__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 |
| #include <endian.h> |
| #if 0 |
| #define LITTLE_ENDIAN _LITTLE_ENDIAN |
| #define BIG_ENDIAN _BIG_ENDIAN |
| #define PDP_ENDIAN _PDP_ENDIAN |
| #define BYTE_ORDER _BYTE_ORDER |
| #endif //0 |
| #endif |
| |
| #if defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE_BUILTIN_CONSTANT_P) |
| |
| #define __byte_swap_int_var(x) \ |
| __extension__ ({ register __uint32_t __X = (x); \ |
| __asm ("bswap %0" : "+r" (__X)); \ |
| __X; }) |
| |
| #ifdef __OPTIMIZE__ |
| |
| #define __byte_swap_int_const(x) \ |
| ((((x) & 0xff000000) >> 24) | \ |
| (((x) & 0x00ff0000) >> 8) | \ |
| (((x) & 0x0000ff00) << 8) | \ |
| (((x) & 0x000000ff) << 24)) |
| #define __byte_swap_int(x) (__builtin_constant_p(x) ? \ |
| __byte_swap_int_const(x) : __byte_swap_int_var(x)) |
| |
| #else /* __OPTIMIZE__ */ |
| |
| #define __byte_swap_int(x) __byte_swap_int_var(x) |
| |
| #endif /* __OPTIMIZE__ */ |
| |
| static __inline __uint64_t |
| __bswap64(__uint64_t _x) |
| { |
| |
| return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) | |
| ((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) | |
| ((_x << 24) & ((__uint64_t)0xff << 40)) | |
| ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56))); |
| } |
| |
| static __inline __uint32_t |
| __bswap32(__uint32_t _x) |
| { |
| |
| return (__byte_swap_int(_x)); |
| } |
| |
| static __inline __uint16_t |
| __bswap16(__uint16_t _x) |
| { |
| return (_x << 8 | _x >> 8); |
| } |
| |
| #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 /* !_BSD_MACHINE_ENDIAN_H_ */ |