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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 2003 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___ */