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.
94 lines
2.5 KiB
94 lines
2.5 KiB
/* Copyright (C) 2010-2020 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(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
|
|
|