/* * Copyright (c) 2016, 2019 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. */ #include "arm_math.h" #include "NEMath.h" #if defined(ARM_MATH_NEON) /** Exponent polynomial coefficients */ const float32_t exp_tab[4*8] = { 1.f,1.f,1.f,1.f, 0.0416598916054f,0.0416598916054f,0.0416598916054f,0.0416598916054f, 0.500000596046f,0.500000596046f,0.500000596046f,0.500000596046f, 0.0014122662833f,0.0014122662833f,0.0014122662833f,0.0014122662833f, 1.00000011921f,1.00000011921f,1.00000011921f,1.00000011921f, 0.00833693705499f,0.00833693705499f,0.00833693705499f,0.00833693705499f, 0.166665703058f,0.166665703058f,0.166665703058f,0.166665703058f, 0.000195780929062f,0.000195780929062f,0.000195780929062f,0.000195780929062f }; /** Logarithm polynomial coefficients */ /* p0 p4 p2 p6 p1 p5 p3 p7 where Poly(x) is the Minimax approximation of log(x) over the range [1, 2] */ const float32_t log_tab[4*8] = { -2.29561495781f,-2.29561495781f,-2.29561495781f,-2.29561495781f, -2.47071170807f,-2.47071170807f,-2.47071170807f,-2.47071170807f, -5.68692588806f,-5.68692588806f,-5.68692588806f,-5.68692588806f, -0.165253549814f,-0.165253549814f,-0.165253549814f,-0.165253549814f, 5.17591238022f,5.17591238022f,5.17591238022f,5.17591238022f, 0.844007015228f,0.844007015228f,0.844007015228f,0.844007015228f, 4.58445882797f,4.58445882797f,4.58445882797f,4.58445882797f, 0.0141278216615f,0.0141278216615f,0.0141278216615f,0.0141278216615f }; #endif