From 2628932a40d769d8d0180ba6fed1e7b9b2718982 Mon Sep 17 00:00:00 2001 From: jaseg Date: Sun, 3 May 2020 19:53:02 +0200 Subject: minkbd: repo restructure --- .../DSP/Source/FastMathFunctions/arm_sqrt_q15.c | 144 --------------------- 1 file changed, 144 deletions(-) delete mode 100644 Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q15.c (limited to 'Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q15.c') diff --git a/Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q15.c b/Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q15.c deleted file mode 100644 index 83e4ddd..0000000 --- a/Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q15.c +++ /dev/null @@ -1,144 +0,0 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_sqrt_q15.c - * Description: Q15 square root function - * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 - * - * Target Processor: Cortex-M cores - * -------------------------------------------------------------------- */ -/* - * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. - * - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the License); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an AS IS BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "arm_math.h" -#include "arm_common_tables.h" - - -/** - * @ingroup groupFastMath - */ - -/** - * @addtogroup SQRT - * @{ - */ - - /** - * @brief Q15 square root function. - * @param[in] in input value. The range of the input value is [0 +1) or 0x0000 to 0x7FFF. - * @param[out] *pOut square root of input value. - * @return The function returns ARM_MATH_SUCCESS if the input value is positive - * and ARM_MATH_ARGUMENT_ERROR if the input is negative. For - * negative inputs, the function returns *pOut = 0. - */ - -arm_status arm_sqrt_q15( - q15_t in, - q15_t * pOut) -{ - q15_t number, temp1, var1, signBits1, half; - q31_t bits_val1; - float32_t temp_float1; - union - { - q31_t fracval; - float32_t floatval; - } tempconv; - - number = in; - - /* If the input is a positive number then compute the signBits. */ - if (number > 0) - { - signBits1 = __CLZ(number) - 17; - - /* Shift by the number of signBits1 */ - if ((signBits1 % 2) == 0) - { - number = number << signBits1; - } - else - { - number = number << (signBits1 - 1); - } - - /* Calculate half value of the number */ - half = number >> 1; - /* Store the number for later use */ - temp1 = number; - - /* Convert to float */ - temp_float1 = number * 3.051757812500000e-005f; - /*Store as integer */ - tempconv.floatval = temp_float1; - bits_val1 = tempconv.fracval; - /* Subtract the shifted value from the magic number to give intial guess */ - bits_val1 = 0x5f3759df - (bits_val1 >> 1); /* gives initial guess */ - /* Store as float */ - tempconv.fracval = bits_val1; - temp_float1 = tempconv.floatval; - /* Convert to integer format */ - var1 = (q31_t) (temp_float1 * 16384); - - /* 1st iteration */ - var1 = ((q15_t) ((q31_t) var1 * (0x3000 - - ((q15_t) - ((((q15_t) - (((q31_t) var1 * var1) >> 15)) * - (q31_t) half) >> 15))) >> 15)) << 2; - /* 2nd iteration */ - var1 = ((q15_t) ((q31_t) var1 * (0x3000 - - ((q15_t) - ((((q15_t) - (((q31_t) var1 * var1) >> 15)) * - (q31_t) half) >> 15))) >> 15)) << 2; - /* 3rd iteration */ - var1 = ((q15_t) ((q31_t) var1 * (0x3000 - - ((q15_t) - ((((q15_t) - (((q31_t) var1 * var1) >> 15)) * - (q31_t) half) >> 15))) >> 15)) << 2; - - /* Multiply the inverse square root with the original value */ - var1 = ((q15_t) (((q31_t) temp1 * var1) >> 15)) << 1; - - /* Shift the output down accordingly */ - if ((signBits1 % 2) == 0) - { - var1 = var1 >> (signBits1 / 2); - } - else - { - var1 = var1 >> ((signBits1 - 1) / 2); - } - *pOut = var1; - - return (ARM_MATH_SUCCESS); - } - /* If the number is a negative number then store zero as its square root value */ - else - { - *pOut = 0; - return (ARM_MATH_ARGUMENT_ERROR); - } -} - -/** - * @} end of SQRT group - */ -- cgit