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/*
* 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__ */
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