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| Rev | Author | Line No. | Line |
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| 2 | pj | 1 | /* |
| 2 | * Copyright (c) 1987, 1991 Regents of the University of California. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. All advertising materials mentioning features or use of this software |
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| 14 | * must display the following acknowledgement: |
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| 15 | * This product includes software developed by the University of |
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| 16 | * California, Berkeley and its contributors. |
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| 17 | * 4. Neither the name of the University nor the names of its contributors |
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| 18 | * may be used to endorse or promote products derived from this software |
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| 19 | * without specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 31 | * SUCH DAMAGE. |
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| 32 | * |
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| 33 | * from: @(#)endian.h 7.8 (Berkeley) 4/3/91 |
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| 34 | * endian.h,v 1.5 1994/09/10 20:03:14 csgr Exp |
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| 35 | */ |
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| 36 | |||
| 37 | #ifndef _MACHINE_ENDIAN_H_ |
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| 38 | #define _MACHINE_ENDIAN_H_ 1 |
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| 39 | |||
| 40 | /* |
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| 41 | * Define the order of 32-bit words in 64-bit words. |
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| 42 | */ |
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| 43 | #define _QUAD_HIGHWORD 1 |
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| 44 | #define _QUAD_LOWWORD 0 |
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| 45 | |||
| 46 | /* |
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| 47 | * Definitions for byte order, according to byte significance from low |
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| 48 | * address to high. |
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| 49 | */ |
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| 50 | #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ |
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| 51 | #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ |
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| 52 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ |
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| 53 | |||
| 54 | #define BYTE_ORDER LITTLE_ENDIAN |
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| 55 | |||
| 56 | #ifndef KERNEL |
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| 57 | #include <ll/sys/cdefs.h> |
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| 58 | #endif |
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| 59 | |||
| 60 | #define __word_swap_long(x) \ |
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| 61 | ({ register u_long X = (x); \ |
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| 62 | __asm ("rorl $16, %1" \ |
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| 63 | : "=r" (X) \ |
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| 64 | : "0" (X)); \ |
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| 65 | X; }) |
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| 66 | #if __GNUC__ >= 2 |
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| 67 | #define __byte_swap_long(x) \ |
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| 68 | ({ register u_long X = (x); \ |
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| 69 | __asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \ |
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| 70 | : "=q" (X) \ |
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| 71 | : "0" (X)); \ |
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| 72 | X; }) |
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| 73 | #define __byte_swap_word(x) \ |
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| 74 | ({ register u_short X = (x); \ |
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| 75 | __asm ("xchgb %h1, %b1" \ |
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| 76 | : "=q" (X) \ |
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| 77 | : "0" (X)); \ |
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| 78 | X; }) |
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| 79 | #else /* __GNUC__ >= 2 */ |
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| 80 | #define __byte_swap_long(x) \ |
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| 81 | ({ register u_long X = (x); \ |
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| 82 | __asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \ |
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| 83 | : "=r" (X) \ |
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| 84 | : "0" (X)); \ |
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| 85 | X; }) |
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| 86 | #define __byte_swap_word(x) \ |
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| 87 | ({ register u_short X = (x); \ |
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| 88 | __asm ("rorw $8, %w1" \ |
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| 89 | : "=r" (X) \ |
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| 90 | : "0" (X)); \ |
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| 91 | X; }) |
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| 92 | #endif /* __GNUC__ >= 2 */ |
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| 93 | |||
| 94 | /* |
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| 95 | * Macros for network/external number representation conversion. |
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| 96 | */ |
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| 97 | #if BYTE_ORDER == BIG_ENDIAN && !defined(lint) |
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| 98 | #define ntohl(x) (x) |
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| 99 | #define ntohs(x) (x) |
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| 100 | #define htonl(x) (x) |
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| 101 | #define htons(x) (x) |
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| 102 | |||
| 103 | #define NTOHL(x) (x) |
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| 104 | #define NTOHS(x) (x) |
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| 105 | #define HTONL(x) (x) |
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| 106 | #define HTONS(x) (x) |
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| 107 | |||
| 108 | #else |
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| 109 | |||
| 110 | #define ntohl __byte_swap_long |
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| 111 | #define ntohs __byte_swap_word |
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| 112 | #define htonl __byte_swap_long |
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| 113 | #define htons __byte_swap_word |
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| 114 | |||
| 115 | #define NTOHL(x) (x) = ntohl((u_long)x) |
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| 116 | #define NTOHS(x) (x) = ntohs((u_short)x) |
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| 117 | #define HTONL(x) (x) = htonl((u_long)x) |
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| 118 | #define HTONS(x) (x) = htons((u_short)x) |
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| 119 | #endif |
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| 120 | #endif /* _MACHINE_ENDIAN_H_ */ |