| /* |
| * Copyright (c) 2016, 2017 ARM Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #ifndef __ARM_COMPUTE_NEMATH_H__ |
| #define __ARM_COMPUTE_NEMATH_H__ |
| |
| #include <arm_neon.h> |
| |
| namespace arm_compute |
| { |
| /** Calculate inverse square root. |
| * |
| * @param[in] x Input value. |
| * |
| * @return The calculated inverse square root. |
| */ |
| float32x4_t vinvsqrtq_f32(float32x4_t x); |
| |
| /** Calculate reciprocal. |
| * |
| * @param[in] x Input value. |
| * |
| * @return The calculated reciprocal. |
| */ |
| float32x4_t vinvq_f32(float32x4_t x); |
| |
| /** Perform a 7th degree polynomial approximation using Estrin's method. |
| * |
| * @param[in] x Input vector value in F32 format. |
| * @param[in] coeffs Polynomial coefficients table. |
| * |
| * @return The calculated approximation. |
| */ |
| float32x4_t vtaylor_polyq_f32(float32x4_t x, const std::array<float32x4_t, 8> &coeffs); |
| |
| /** Calculate exponential |
| * |
| * @param[in] x Input vector value in F32 format. |
| * |
| * @return The calculated exponent. |
| */ |
| float32x4_t vexpq_f32(float32x4_t x); |
| |
| /** Calculate logarithm |
| * |
| * @param[in] x Input vector value in F32 format. |
| * |
| * @return The calculated logarithm. |
| */ |
| float32x4_t vlogq_f32(float32x4_t x); |
| |
| /** Calculate hyperbolic tangent. |
| * |
| * tanh(x) = (e^2x - 1)/(e^2x + 1) |
| * |
| * @note We clamp x to [-5,5] to avoid overflowing issues. |
| * |
| * @param[in] val Input vector value in F32 format. |
| * |
| * @return The calculated Hyperbolic Tangent. |
| */ |
| float32x4_t vtanhq_f32(float32x4_t val); |
| |
| /** Calculate n power of a number. |
| * |
| * pow(x,n) = e^(n*log(x)) |
| * |
| * @param[in] val Input vector value in F32 format. |
| * @param[in] n Powers to raise the input to. |
| * |
| * @return The calculated power. |
| */ |
| float32x4_t vpowq_f32(float32x4_t val, float32x4_t n); |
| |
| #ifdef ARM_COMPUTE_ENABLE_FP16 |
| /** Calculate exponential |
| * |
| * @param[in] x Input vector value in F16 format. |
| * |
| * @return The calculated exponent. |
| */ |
| float16x8_t vexpq_f16(float16x8_t x); |
| /** Calculate n power of a number. |
| * |
| * pow(x,n) = e^(n*log(x)) |
| * |
| * @param[in] val Input vector value in F16 format. |
| * @param[in] n Powers to raise the input to. |
| * |
| * @return The calculated power. |
| */ |
| float16x8_t vpowq_f16(float16x8_t val, float16x8_t n); |
| #endif /* ARM_COMPUTE_ENABLE_FP16 */ |
| } |
| #include "arm_compute/core/NEON/NEMath.inl" |
| #endif /* __ARM_COMPUTE_NEMATH_H__ */ |