You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
4.0 KiB
116 lines
4.0 KiB
/*==LICENSE==* |
|
|
|
CyanWorlds.com Engine - MMOG client, server and tools |
|
Copyright (C) 2011 Cyan Worlds, Inc. |
|
|
|
This program is free software: you can redistribute it and/or modify |
|
it under the terms of the GNU General Public License as published by |
|
the Free Software Foundation, either version 3 of the License, or |
|
(at your option) any later version. |
|
|
|
This program is distributed in the hope that it will be useful, |
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
GNU General Public License for more details. |
|
|
|
You should have received a copy of the GNU General Public License |
|
along with this program. If not, see <http://www.gnu.org/licenses/>. |
|
|
|
Additional permissions under GNU GPL version 3 section 7 |
|
|
|
If you modify this Program, or any covered work, by linking or |
|
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK, |
|
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent |
|
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK |
|
(or a modified version of those libraries), |
|
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA, |
|
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG |
|
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the |
|
licensors of this Program grant you additional |
|
permission to convey the resulting work. Corresponding Source for a |
|
non-source form of such a combination shall include the source code for |
|
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered |
|
work. |
|
|
|
You can contact Cyan Worlds, Inc. by email legal@cyan.com |
|
or by snail mail at: |
|
Cyan Worlds, Inc. |
|
14617 N Newport Hwy |
|
Mead, WA 99021 |
|
|
|
*==LICENSE==*/ |
|
/***************************************************************************** |
|
* |
|
* $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtMath.h |
|
* |
|
***/ |
|
|
|
#ifdef PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNUTILS_PRIVATE_PNUTMATH_H |
|
#error "Header $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtMath.h included more than once" |
|
#endif |
|
#define PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNUTILS_PRIVATE_PNUTMATH_H |
|
|
|
|
|
/***************************************************************************** |
|
* |
|
* Calling conventions |
|
* |
|
***/ |
|
|
|
#ifdef _M_IX86 |
|
#define MATHCALL __fastcall |
|
#else |
|
#define MATHCALL |
|
#endif |
|
|
|
|
|
/***************************************************************************** |
|
* |
|
* Bit manipulation functions |
|
* |
|
***/ |
|
|
|
unsigned MATHCALL MathLowBitPos (dword val); |
|
unsigned MATHCALL MathHighBitPos (dword val); |
|
|
|
//=========================================================================== |
|
inline unsigned MathBitCount (dword val) { |
|
val = val - ((val >> 1) & 033333333333) - ((val >> 2) & 011111111111); |
|
val = ((val + (val >> 3)) & 030707070707); |
|
val = val + (val >> 6); |
|
val = (val + (val >> 12) + (val >> 24)) & 077; |
|
return val; |
|
} |
|
|
|
//=========================================================================== |
|
inline unsigned MathBitMaskCreate (unsigned count) { |
|
ASSERT(count <= 8 * sizeof(unsigned)); |
|
return count ? ((2 << (count - 1)) - 1) : 0; |
|
} |
|
|
|
//=========================================================================== |
|
inline dword MathHighBitValue (dword val) { |
|
return val ? 1 << MathHighBitPos(val) : 0; |
|
} |
|
|
|
//=========================================================================== |
|
inline bool MathIsPow2 (unsigned val) { |
|
return !(val & (val - 1)); |
|
} |
|
|
|
//=========================================================================== |
|
inline unsigned MathLowBitValue (unsigned val) { |
|
return val & ~(val - 1); |
|
} |
|
|
|
//=========================================================================== |
|
inline unsigned MathNextMultiplePow2 (unsigned val, unsigned multiple) { |
|
ASSERT(multiple); |
|
ASSERT(MathIsPow2(multiple)); |
|
return (val + (multiple - 1)) & ~(multiple - 1); |
|
} |
|
|
|
//=========================================================================== |
|
inline dword MathNextPow2 (dword val) { |
|
return MathIsPow2(val) ? val : 1 << (MathHighBitPos(val) + 1); |
|
}
|
|
|