Annotation of sys/arch/vax/include/endian.h, Revision 1.1.1.1
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_ */
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