| 0,0 → 1,64 |
|---|
| /* |
| * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium |
| * Copyright (c) 2002-2007, Professor Benoit Macq |
| * Copyright (c) 2001-2003, David Janssens |
| * Copyright (c) 2002-2003, Yannick Verschueren |
| * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe |
| * Copyright (c) 2005, Herve Drolon, FreeImage Team |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #ifndef __FIX_H |
| #define __FIX_H |
| |
| #if defined(_MSC_VER) || defined(__BORLANDC__) |
| #define int64 __int64 |
| #else |
| #define int64 long long |
| #endif |
| |
| /** |
| @file fix.h |
| @brief Implementation of operations of specific multiplication (FIX) |
| |
| The functions in FIX.H have for goal to realize specific multiplication. |
| */ |
| |
| /** @defgroup FIX FIX - Implementation of operations of specific multiplication */ |
| /*@{*/ |
| |
| /** |
| Multiply two fixed-precision rational numbers. |
| @param a |
| @param b |
| @return Returns a * b |
| */ |
| static INLINE int fix_mul(int a, int b) { |
| int64 temp = (int64) a * (int64) b ; |
| temp += temp & 4096; |
| return (int) (temp >> 13) ; |
| } |
| |
| /*@}*/ |
| |
| #endif /* __FIX_H */ |