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/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atiutil.h,v 1.8 2003/01/01 19:16:34 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
/*
* 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(int *, int *);
extern int ATIDivide(int, int, int, const int);
#endif /* ___ATIUTIL_H___ */
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