text: /* Copyright  (C) 2010-2017 The RetroArch team
   *
   * ---------------------------------------------------------------------------------------
   * The following license statement only applies to this file (retro_math.h).
   * ---------------------------------------------------------------------------------------
   *
   * Permission is hereby granted, free of charge,
   * to any person obtaining a copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
   * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
   * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef _LIBRETRO_COMMON_MATH_H
  #define _LIBRETRO_COMMON_MATH_H
  
  #include <stdint.h>
  
  #if defined(_WIN32) && !defined(_XBOX)
  #define WIN32_LEAN_AND_MEAN
  #include <windows.h>
  #elif defined(_WIN32) && defined(_XBOX)
  #include <Xtl.h>
  #endif
  
  #include <limits.h>
  
  #ifdef _MSC_VER
  #include <compat/msvc.h>
  #endif
  #include <retro_inline.h>
  
  #ifndef M_PI
  #if !defined(_MSC_VER) && !defined(USE_MATH_DEFINES)
  #define M_PI 3.14159265358979323846264338327
  #endif
  #endif
  
  #ifndef MAX
  #define MAX(a, b) ((a) > (b) ? (a) : (b))
  #endif
  
  #ifndef MIN
  #define MIN(a, b) ((a) < (b) ? (a) : (b))
  #endif
  
  /**
   * next_pow2:
   * @v         : initial value
   *
   * Get next power of 2 value based on  initial value.
   *
   * Returns: next power of 2 value (derived from @v).
   **/
  static INLINE uint32_t next_pow2(uint32_t v)
  {
     v--;
     v |= v >> 1;
     v |= v >> 2;
     v |= v >> 4;
     v |= v >> 8;
     v |= v >> 16;
     v++;
     return v;
  }
  
  /**
   * prev_pow2:
   * @v         : initial value
   *
   * Get previous power of 2 value based on initial value.
   *
   * Returns: previous power of 2 value (derived from @v).
   **/
  static INLINE uint32_t prev_pow2(uint32_t v)
  {
     v |= v >> 1;
     v |= v >> 2;
     v |= v >> 4;
     v |= v >> 8;
     v |= v >> 16;
     return v - (v >> 1);
  }
  
  #endif
  