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zephyr/lib/libc/minimal/include/math.h

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lib/libc/min: Introduce simple math.h Introduce math.h to get definitions of float_t and double_t. Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
2019-09-26 21:28:21 +08:00
/*
* Copyright (c) 2019 Linaro Limited.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_MATH_H_
#define ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_MATH_H_
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(FLT_EVAL_METHOD) && defined(__FLT_EVAL_METHOD__)
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#endif
#if defined FLT_EVAL_METHOD
#if FLT_EVAL_METHOD == 0
typedef float float_t;
typedef double double_t;
#elif FLT_EVAL_METHOD == 1
typedef double float_t;
typedef double double_t;
#elif FLT_EVAL_METHOD == 2
typedef long double float_t;
typedef long double double_t;
#else
/* Implementation-defined. Assume float_t and double_t have
* already been defined */
#endif
#else
typedef float float_t;
typedef double double_t;
#endif
libc: minimal: Add math macro definition When the sof module code was build, it was found that PI was not defined in the minimal library. Here are some mathematical constant definitions to avoid build errors. Signed-off-by: Yang XiaoHua <yangxiaohuamail@gmail.com>
2021-04-21 10:31:42 +08:00
/* Useful constants. */
#define MAXFLOAT 3.40282347e+38F
#define M_E 2.7182818284590452354
#define M_LOG2E 1.4426950408889634074
#define M_LOG10E 0.43429448190325182765
#define M_LN2 0.693147180559945309417
#define M_LN10 2.30258509299404568402
#define M_PI 3.14159265358979323846
#define M_PI_2 1.57079632679489661923
#define M_PI_4 0.78539816339744830962
#define M_1_PI 0.31830988618379067154
#define M_2_PI 0.63661977236758134308
#define M_2_SQRTPI 1.12837916709551257390
#define M_SQRT2 1.41421356237309504880
#define M_SQRT1_2 0.70710678118654752440
lib/libc/minimal: Move sqrt/sqrtf from samples The lmp90100_evb sample included an implementation of double sqrt, and the on_off_level_lighting_vnd_app sample included an implementation of float sqrtf. Move that code into minimal libc instead of requiring applications to hand-roll their own version. Signed-off-by: Keith Packard <keithp@keithp.com>
2022-04-28 00:51:21 +08:00
float sqrtf(float square);
double sqrt(double square);
lib/libc/min: Introduce simple math.h Introduce math.h to get definitions of float_t and double_t. Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
2019-09-26 21:28:21 +08:00
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_MATH_H_ */