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Annotation of sys/arch/m68k/include/endian.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: endian.h,v 1.15 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 _M68K_ENDIAN_H_
                     28: #define _M68K_ENDIAN_H_
                     29:
                     30: #ifdef __GNUC__
                     31:
                     32: #define        __swap64md      __swap64gen
                     33:
                     34: #define        __swap32md(x) ({                                                \
                     35:        u_int32_t __swap32md_x = (x);                                   \
                     36:                                                                        \
                     37:        __asm ("rorw #8, %0; swap %0; rorw #8, %0" :                    \
                     38:            "=d" (__swap32md_x) : "0" (__swap32md_x));                  \
                     39:        __swap32md_x;                                                   \
                     40: })
                     41:
                     42: #define        __swap16md(x) ({                                                \
                     43:        u_int16_t __swap16md_x = (x);                                   \
                     44:                                                                        \
                     45:        __asm ("rorw #8, %0" : "=d" (__swap16md_x) :                    \
                     46:            "0" (__swap16md_x));                                        \
                     47:        __swap16md_x;                                                   \
                     48: })
                     49:
                     50: /* Tell sys/endian.h we have MD variants of the swap macros.  */
                     51: #define MD_SWAP
                     52:
                     53: #endif /* __GNUC__ */
                     54:
                     55: #define _BYTE_ORDER _BIG_ENDIAN
                     56: #include <sys/endian.h>
                     57:
                     58: #endif /* _M68K_ENDIAN_H_ */