diff options
Diffstat (limited to 'xorg-server/mi/micoord.h')
| -rw-r--r-- | xorg-server/mi/micoord.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/xorg-server/mi/micoord.h b/xorg-server/mi/micoord.h new file mode 100644 index 000000000..876e88c95 --- /dev/null +++ b/xorg-server/mi/micoord.h @@ -0,0 +1,69 @@ +/* + * Copyright (C) 2000 The XFree86 Project, Inc. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name of the XFree86 Project shall + * not be used in advertising or otherwise to promote the sale, use or other + * dealings in this Software without prior written authorization from the + * XFree86 Project. + * + */ + +#ifndef _MICOORD_H_ +#define _MICOORD_H_ 1 + +#include "servermd.h" + +/* Macros which handle a coordinate in a single register */ + +/* + * Most compilers will convert divisions by 65536 into shifts, if signed + * shifts exist. If your machine does arithmetic shifts and your compiler + * can't get it right, add to this line. + */ + +/* + * mips compiler - what a joke - it CSEs the 65536 constant into a reg + * forcing as to use div instead of shift. Let's be explicit. + */ + +#if defined(mips) || defined(sgi) || \ + defined(sparc) || defined(__sparc64__) || \ + defined(__alpha) || defined(__alpha__) || \ + defined(__i386__) || defined(__i386) || defined(__ia64__) || \ + defined(__s390x__) || defined(__s390__) || \ + defined(__amd64__) || defined(amd64) || defined(__amd64) || defined(__x86_64__) +#define GetHighWord(x) (((int) (x)) >> 16) +#else +#define GetHighWord(x) (((int) (x)) / 65536) +#endif + +#if IMAGE_BYTE_ORDER == MSBFirst +#define intToCoord(i,x,y) (((x) = GetHighWord(i)), ((y) = (int) ((short) (i)))) +#define coordToInt(x,y) (((x) << 16) | ((y) & 0xffff)) +#define intToX(i) (GetHighWord(i)) +#define intToY(i) ((int) ((short) i)) +#else +#define intToCoord(i,x,y) (((x) = (int) ((short) (i))), ((y) = GetHighWord(i))) +#define coordToInt(x,y) (((y) << 16) | ((x) & 0xffff)) +#define intToX(i) ((int) ((short) (i))) +#define intToY(i) (GetHighWord(i)) +#endif + +#endif /* _MICOORD_H_ */ |