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dianjixz
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
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* This file is part of the OpenMV project.
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*
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* Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
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* Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
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*
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* This work is licensed under the MIT license, see the file LICENSE for details.
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*
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* Fast approximate math functions.
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*/
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#ifndef __FMATH_H__
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#define __FMATH_H__
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#include <stdlib.h>
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#include <stdint.h>
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#include <float.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <math.h>
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float fast_sqrtf(float x);
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int fast_floorf(float x);
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int fast_ceilf(float x);
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int fast_roundf(float x);
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float fast_fabsf(float x);
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float fast_atanf(float x);
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float fast_atan2f(float y, float x);
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float fast_expf(float x);
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float fast_cbrtf(float d);
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float fast_log(float x);
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float fast_log2(float x);
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float fast_powf(float a, float b);
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void fast_get_min_max(float *data, size_t data_len, float *p_min, float *p_max);
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extern const float cos_table[360];
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extern const float sin_table[360];
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void fmath_init();
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uint32_t rng_randint(uint32_t min, uint32_t max);
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#ifdef __cplusplus
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}
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#endif
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#endif // __FMATH_H__
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