mirror of
https://github.com/DrasLorus/CORDIC_Rotate_APFX.git
synced 2024-11-14 17:13:27 +01:00
51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
|
/*
|
||
|
|
*
|
||
|
|
* Copyright 2022 Camille "DrasLorus" Monière.
|
||
|
|
*
|
||
|
|
* This file is part of CORDIC_Rotate_APFX.
|
||
|
|
*
|
||
|
|
* 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 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
|
||
|
|
* 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 <https://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _DEFINITIONS_HPP_
|
||
|
|
#define _DEFINITIONS_HPP_
|
||
|
|
|
||
|
|
#include <cstddef>
|
||
|
|
#include <cstdint>
|
||
|
|
|
||
|
|
#ifdef M_PI
|
||
|
|
constexpr double pi = M_PI;
|
||
|
|
#else
|
||
|
|
constexpr double pi = 3.14159265358979323846;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
constexpr double half_pi = pi / 2;
|
||
|
|
constexpr double inv_pi = 1 / pi;
|
||
|
|
constexpr double two_pi = 2 * pi;
|
||
|
|
constexpr double inv_2pi = 0.5 * inv_pi;
|
||
|
|
|
||
|
|
constexpr uint32_t needed_bits(uint32_t value) {
|
||
|
|
uint32_t result = 0;
|
||
|
|
while (value > 0) {
|
||
|
|
result++;
|
||
|
|
value >>= 1;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr bool is_pow_2(uint32_t value) {
|
||
|
|
return (1U << (needed_bits(value) - 1)) == value;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // _DEFINITIONS_HPP_
|