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/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
* Copyright (C) 2011-2017 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MT32EMU_MMATH_H
#define MT32EMU_MMATH_H
#include <cmath>
namespace MT32Emu {
// Mathematical constants
const double DOUBLE_PI = 3.141592653589793;
const double DOUBLE_LN_10 = 2.302585092994046;
const float FLOAT_PI = 3.1415927f;
const float FLOAT_2PI = 6.2831853f;
const float FLOAT_LN_2 = 0.6931472f;
const float FLOAT_LN_10 = 2.3025851f;
static inline float POWF(float x, float y) {
return pow(x, y);
}
static inline float EXPF(float x) {
return exp(x);
}
static inline float EXP2F(float x) {
#ifdef __APPLE__
// on OSX exp2f() is 1.59 times faster than "exp() and the multiplication with FLOAT_LN_2"
return exp2f(x);
#else
return exp(FLOAT_LN_2 * x);
#endif
}
static inline float EXP10F(float x) {
return exp(FLOAT_LN_10 * x);
}
static inline float LOGF(float x) {
return log(x);
}
static inline float LOG2F(float x) {
return log(x) / FLOAT_LN_2;
}
static inline float LOG10F(float x) {
return log10(x);
}
} // namespace MT32Emu
#endif // #ifndef MT32EMU_MMATH_H
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