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Annotation of sys/arch/vax/include/endian.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: endian.h,v 1.13 2005/12/13 00:35:23 millert Exp $     */
        !             2:
        !             3: /*-
        !             4:  * Copyright (c) 1997 Niklas Hallqvist.  All rights reserved.
        !             5:  *
        !             6:  * Redistribution and use in source and binary forms, with or without
        !             7:  * modification, are permitted provided that the following conditions
        !             8:  * are met:
        !             9:  * 1. Redistributions of source code must retain the above copyright
        !            10:  *    notice, this list of conditions and the following disclaimer.
        !            11:  * 2. Redistributions in binary form must reproduce the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer in the
        !            13:  *    documentation and/or other materials provided with the distribution.
        !            14:  *
        !            15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            17:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            18:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            19:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            20:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            21:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            22:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            23:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            24:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            25:  */
        !            26:
        !            27: #ifndef _VAX_ENDIAN_H_
        !            28: #define _VAX_ENDIAN_H_
        !            29:
        !            30: #ifdef __GNUC__
        !            31:
        !            32: #define        __swap64md      __swap64gen
        !            33:
        !            34: #define        __swap32md(x) ({                                                \
        !            35:        u_int32_t __swap32md_y, __swap32md_x = (x);                     \
        !            36:                                                                        \
        !            37:        __asm ("rotl $-8, %1, %0; insv %0, $16, $8, %0; "               \
        !            38:            "rotl $8, %1, r1; movb r1, %0" :                            \
        !            39:            "&=r" (__swap32md_y) : "r" (__swap32md_x) : "r1", "cc");    \
        !            40:        __swap32md_y;                                                   \
        !            41: })
        !            42:
        !            43: #define __swap16md(x) ({                                               \
        !            44:        u_int16_t __swap16md_y, __swap16md_x = (x);                     \
        !            45:                                                                        \
        !            46:        __asm ("rotl $8, %1, %0; rotl $-8, %1, r1; movb r1, %0; "       \
        !            47:            "movzwl %0, %0" :                                           \
        !            48:            "&=r" (__swap16md_y) : "r" (__swap16md_x) : "r1", "cc");    \
        !            49:        __swap16md_y;                                                   \
        !            50: })
        !            51:
        !            52: /* Tell sys/endian.h we have MD variants of the swap macros.  */
        !            53: #ifdef notyet
        !            54: #define MD_SWAP
        !            55: #endif
        !            56:
        !            57: #endif /* __GNUC__ */
        !            58:
        !            59: #define _BYTE_ORDER _LITTLE_ENDIAN
        !            60: #include <sys/endian.h>
        !            61:
        !            62: #endif /* _VAX_ENDIAN_H_ */