71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
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/*
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* Copyright (C) 2000 The XFree86 Project, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the XFree86 Project shall
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* not be used in advertising or otherwise to promote the sale, use or other
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* dealings in this Software without prior written authorization from the
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* XFree86 Project.
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*
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*/
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#ifndef _MICOORD_H_
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#define _MICOORD_H_ 1
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#include "servermd.h"
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/* Macros which handle a coordinate in a single register */
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/*
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* Most compilers will convert divisions by 65536 into shifts, if signed
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* shifts exist. If your machine does arithmetic shifts and your compiler
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* can't get it right, add to this line.
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*/
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/*
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* mips compiler - what a joke - it CSEs the 65536 constant into a reg
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* forcing as to use div instead of shift. Let's be explicit.
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*/
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#if defined(mips) || defined(sgi) || \
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defined(sparc) || defined(__sparc64__) || \
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defined(__alpha) || defined(__alpha__) || \
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defined(__i386__) || defined(i386) || \
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defined(__ia64__) || defined(ia64) || \
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defined(__s390x__) || defined(__s390__) || \
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defined(__amd64__) || defined(amd64) || defined(__amd64)
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#define GetHighWord(x) (((int) (x)) >> 16)
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#else
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#define GetHighWord(x) (((int) (x)) / 65536)
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#endif
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#if IMAGE_BYTE_ORDER == MSBFirst
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#define intToCoord(i,x,y) (((x) = GetHighWord(i)), ((y) = (int) ((short) (i))))
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#define coordToInt(x,y) (((x) << 16) | ((y) & 0xffff))
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#define intToX(i) (GetHighWord(i))
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#define intToY(i) ((int) ((short) i))
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#else
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#define intToCoord(i,x,y) (((x) = (int) ((short) (i))), ((y) = GetHighWord(i)))
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#define coordToInt(x,y) (((y) << 16) | ((x) & 0xffff))
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#define intToX(i) ((int) ((short) (i)))
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#define intToY(i) (GetHighWord(i))
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#endif
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#endif /* _MICOORD_H_ */
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