1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _CPU_NANOHUB_MATH_H_
18#define _CPU_NANOHUB_MATH_H_
19
20#include <cpu/cmsis/arm_math.h>
21
22#define asinf  arm_asinf
23#define sinf   arm_sin_f32
24#define cosf   arm_cos_f32
25#define sqrtf  arm_sqrtf
26
27
28
29static inline float arm_sqrtf(float val)
30{
31    float ret;
32
33    asm(
34        "vsqrt.f32 %0, %1"
35        : "=w" (ret)
36        :"w" (val)
37    );
38
39    return ret;
40}
41
42float atan2f(float, float);
43
44static inline float arm_asinf(float x)
45{
46    return atan2f(x, sqrtf(1.0f - x * x));
47}
48
49#endif
50