/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atiutil.h,v 1.9 2004/01/05 16:42:05 tsi Exp $ */ /* * Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of Marc Aurele La France not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. Marc Aurele La France makes no representations * about the suitability of this software for any purpose. It is provided * "as-is" without express or implied warranty. * * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ #ifndef ___ATIUTIL_H___ #define ___ATIUTIL_H___ 1 #include "atiproto.h" /* * Prevent the C standard's insistence on unsigned long sizeof's from causing * counter-intuitive results. */ #define SizeOf(_object) ((int)sizeof(_object)) #define NumberOf(_what) (SizeOf(_what) / SizeOf(_what[0])) #define __ONE_MICROSECOND__ 100 /* This'll need calibration */ #define ATIDelay(_microseconds) \ { \ unsigned int _i, _j; \ for (_i = 0; _i < _microseconds; _i++) \ for (_j = 0; _j < __ONE_MICROSECOND__; _j++) \ /* Nothing */; \ } /* * Macros to get/set a contiguous bit field. Arguments should not be * self-modifying. */ #define UnitOf(___Value) \ (((((___Value) ^ ((___Value) - 1)) + 1) >> 1) | \ ((((___Value) ^ ((___Value) - 1)) >> 1) + 1)) #define GetBits(__Value, _Mask) (((__Value) & (_Mask)) / UnitOf(_Mask)) #define SetBits(__Value, _Mask) (((__Value) * UnitOf(_Mask)) & (_Mask)) #define MaxBits(__Mask) GetBits(__Mask, __Mask) #define _ByteMask(__Byte) ((CARD8)(-1) << (8 * (__Byte))) #define GetByte(_Value, _Byte) GetBits(_Value, _ByteMask(_Byte)) #define SetByte(_Value, _Byte) SetBits(_Value, _ByteMask(_Byte)) #define _WordMask(__Word) ((CARD16)(-1) << (16 * (__Word))) #define GetWord(_Value, _Word) GetBits(_Value, _WordMask(_Word)) #define SetWord(_Value, _Word) SetBits(_Value, _WordMask(_Word)) extern void ATIReduceRatio FunctionPrototype((int *, int *)); extern int ATIDivide FunctionPrototype((int, int, int, const int)); #endif /* ___ATIUTIL_H___ */