projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| 984263bc MD |
1 | /*- |
| 2 | * Copyright (c) 1999 Marcel Moolenaar | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer | |
| 10 | * in this position and unchanged. | |
| 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 | * 3. The name of the author may not be used to endorse or promote products | |
| 15 | * derived from this software without specific prior written permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | * | |
| 28 | * $FreeBSD: src/sys/sys/assym.h,v 1.3.2.1 2000/07/07 01:31:16 obrien Exp $ | |
| d9f3f6fa | 29 | * $DragonFly: src/sys/sys/assym.h,v 1.3 2004/12/30 07:01:52 cpressey Exp $ |
| 984263bc MD |
30 | */ |
| 31 | ||
| 32 | #ifndef _SYS_ASSYM_H_ | |
| 33 | #define _SYS_ASSYM_H_ | |
| 34 | ||
| d9f3f6fa CP |
35 | #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) |
| 36 | #error "This file should not be included by userland programs." | |
| 37 | #endif | |
| 38 | ||
| c4b81afc MD |
39 | /* Add an ASSYM_BIAS to all arrays to avoid zero-size, which can be |
| 40 | mishandled in some compilers */ | |
| 41 | #define ASSYM_BIAS 0x00100000 | |
| 984263bc | 42 | |
| c4b81afc MD |
43 | #define ASSYM_ABS(value) ((value) < 0 ? -((value) + 1) + 1ULL : (value)) |
| 44 | ||
| 45 | #define ASSYM(name, value) \ | |
| 46 | char name ## sign[((value) < 0 ? 1 : 0) + ASSYM_BIAS]; \ | |
| 47 | char name ## w0[(ASSYM_ABS(value) & 0xFFFFU) + ASSYM_BIAS]; \ | |
| 48 | char name ## w1[((ASSYM_ABS(value) & 0xFFFF0000UL) >> 16) + ASSYM_BIAS]; \ | |
| 49 | char name ## w2[((ASSYM_ABS(value) & 0xFFFF00000000ULL) >> 32) + ASSYM_BIAS]; \ | |
| 50 | char name ## w3[((ASSYM_ABS(value) & 0xFFFF000000000000ULL) >> 48) + ASSYM_BIAS] | |
| 984263bc MD |
51 | |
| 52 | #endif /* !_SYS_ASSYM_H_ */ |