IABSD.fr/xenocara/xserver/mi/micoord.h

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• Author : matthieu
  Date : 2006-11-26 18:13:41
  Hash : 889b8606
  Message : Importing xserver from X.Org 7.2RC2

• xserver/mi/micoord.h

• /*
   * 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(ia64) || \
      defined(__s390x__) || defined(__s390__) || \
      defined(__amd64__) || defined(amd64) || defined(__amd64)
  #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_ */