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a09e091a JB |
1 | /* |
2 | * Copyright (C) 2000 The XFree86 Project, Inc. All Rights Reserved. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to | |
6 | * deal in the Software without restriction, including without limitation the | |
7 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
8 | * sell copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
18 | * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
19 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
20 | * | |
21 | * Except as contained in this notice, the name of the XFree86 Project shall | |
22 | * not be used in advertising or otherwise to promote the sale, use or other | |
23 | * dealings in this Software without prior written authorization from the | |
24 | * XFree86 Project. | |
25 | * | |
26 | */ | |
27 | ||
28 | #ifndef _MICOORD_H_ | |
29 | #define _MICOORD_H_ 1 | |
30 | ||
31 | #include "servermd.h" | |
32 | ||
33 | /* Macros which handle a coordinate in a single register */ | |
34 | ||
35 | /* | |
36 | * Most compilers will convert divisions by 65536 into shifts, if signed | |
37 | * shifts exist. If your machine does arithmetic shifts and your compiler | |
38 | * can't get it right, add to this line. | |
39 | */ | |
40 | ||
41 | /* | |
42 | * mips compiler - what a joke - it CSEs the 65536 constant into a reg | |
43 | * forcing as to use div instead of shift. Let's be explicit. | |
44 | */ | |
45 | ||
46 | #if defined(mips) || \ | |
47 | defined(sparc) || defined(__sparc64__) || \ | |
48 | defined(__alpha) || defined(__alpha__) || \ | |
49 | defined(__i386__) || defined(__i386) || defined(__ia64__) || \ | |
50 | defined(__s390x__) || defined(__s390__) || \ | |
51 | defined(__amd64__) || defined(amd64) || defined(__amd64) | |
52 | #define GetHighWord(x) (((int) (x)) >> 16) | |
53 | #else | |
54 | #define GetHighWord(x) (((int) (x)) / 65536) | |
55 | #endif | |
56 | ||
57 | #if IMAGE_BYTE_ORDER == MSBFirst | |
58 | #define intToCoord(i,x,y) (((x) = GetHighWord(i)), ((y) = (int) ((short) (i)))) | |
59 | #define coordToInt(x,y) (((x) << 16) | ((y) & 0xffff)) | |
60 | #define intToX(i) (GetHighWord(i)) | |
61 | #define intToY(i) ((int) ((short) i)) | |
62 | #else | |
63 | #define intToCoord(i,x,y) (((x) = (int) ((short) (i))), ((y) = GetHighWord(i))) | |
64 | #define coordToInt(x,y) (((y) << 16) | ((x) & 0xffff)) | |
65 | #define intToX(i) ((int) ((short) (i))) | |
66 | #define intToY(i) (GetHighWord(i)) | |
67 | #endif | |
68 | ||
69 | #endif /* _MICOORD_H_ */ |