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)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 42 float atan2f(float, float); 43 arm_asinf(float x)44static inline float arm_asinf(float x) 45 { 46 return atan2f(x, sqrtf(1.0f - x * x)); 47 } 48 49 #endif 50