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_ */
70