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 
21 #define asinf  arm_asinf
22 #define sinf   arm_sin_f32
23 #define cosf   arm_cos_f32
24 #define expf   __ieee754_expf
25 #define sqrtf  arm_sqrtf
26 
27 
28 
arm_sqrtf(float val)29 static 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 
42 float atan2f(float, float);
43 
arm_asinf(float x)44 static inline float arm_asinf(float x)
45 {
46     return atan2f(x, sqrtf(1.0f - x * x));
47 }
48 
49 #endif
50