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Diffstat (limited to 'sys/mips/include/endian.h')
| -rw-r--r-- | sys/mips/include/endian.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/sys/mips/include/endian.h b/sys/mips/include/endian.h new file mode 100644 index 0000000..1d2b4fe --- /dev/null +++ b/sys/mips/include/endian.h @@ -0,0 +1,146 @@ +/*- + * 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 _MACHINE_ENDIAN_H_ +#define _MACHINE_ENDIAN_H_ + +#include <sys/cdefs.h> +#ifndef __ASSEMBLER__ +#include <sys/_types.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * 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 */ + +#ifdef __MIPSEB__ +#define _BYTE_ORDER _BIG_ENDIAN +#else +#define _BYTE_ORDER _LITTLE_ENDIAN +#endif /* __MIBSEB__ */ + +/* + * 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 + +#ifndef __ASSEMBLER__ +#if defined(__GNUCLIKE_BUILTIN_CONSTANT_P) && defined(__OPTIMIZE__) +#define __is_constant(x) __builtin_constant_p(x) +#else +#define __is_constant(x) 0 +#endif + +#define __bswap16_const(x) (((x) >> 8) | (((x) << 8) & 0xff00)) +#define __bswap32_const(x) (((x) >> 24) | (((x) >> 8) & 0xff00) | \ + (((x) << 8) & 0xff0000) | (((x) << 24) & 0xff000000)) +#define __bswap64_const(x) (((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 __uint16_t +__bswap16_var(__uint16_t _x) +{ + + return ((_x >> 8) | ((_x << 8) & 0xff00)); +} + +static __inline __uint32_t +__bswap32_var(__uint32_t _x) +{ + + return ((_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) | + ((_x << 24) & 0xff000000)); +} + +static __inline __uint64_t +__bswap64_var(__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))); +} + +#define __bswap16(x) (__uint16_t)(__is_constant(x) ? __bswap16_const(x) : \ + __bswap16_var(x)) +#define __bswap32(x) (__uint32_t)(__is_constant(x) ? __bswap32_const(x) : \ + __bswap32_var(x)) +#define __bswap64(x) (__uint64_t)(__is_constant(x) ? __bswap64_const(x) : \ + __bswap64_var(x)) + +#ifdef __MIPSEB__ +#define __htonl(x) ((__uint32_t)(x)) +#define __htons(x) ((__uint16_t)(x)) +#define __ntohl(x) ((__uint32_t)(x)) +#define __ntohs(x) ((__uint16_t)(x)) +/* + * Define the order of 32-bit words in 64-bit words. + */ +/* + * XXXMIPS: Additional parentheses to make gcc more happy. + */ +#define _QUAD_HIGHWORD 0 +#define _QUAD_LOWWORD 1 +#else +#define _QUAD_HIGHWORD 1 +#define _QUAD_LOWWORD 0 +#define __ntohl(x) (__bswap32((x))) +#define __ntohs(x) (__bswap16((x))) +#define __htonl(x) (__bswap32((x))) +#define __htons(x) (__bswap16((x))) +#endif /* _MIPSEB */ + +#endif /* _ASSEMBLER_ */ + +#ifdef __cplusplus +} +#endif + +#endif /* !_MACHINE_ENDIAN_H_ */ |
