From 96d6da4e252b06dcfdc041e7df23e86161c33007 Mon Sep 17 00:00:00 2001 From: rihab kouki Date: Tue, 28 Jul 2020 11:24:49 +0100 Subject: Official ARM version: v5.6.0 --- DSP/Source/ControllerFunctions/arm_sin_cos_q31.c | 76 ++++++++++++------------ 1 file changed, 38 insertions(+), 38 deletions(-) (limited to 'DSP/Source/ControllerFunctions/arm_sin_cos_q31.c') diff --git a/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c b/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c index d661830..84ee3d2 100644 --- a/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c +++ b/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c @@ -3,13 +3,13 @@ * Title: arm_sin_cos_q31.c * Description: Cosine & Sine calculation for Q31 values * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 + * $Date: 18. March 2019 + * $Revision: V1.6.0 * * Target Processor: Cortex-M cores * -------------------------------------------------------------------- */ /* - * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. + * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * @@ -30,23 +30,22 @@ #include "arm_common_tables.h" /** - * @ingroup groupController + @ingroup groupController */ - /** - * @addtogroup SinCos - * @{ +/** + @addtogroup SinCos + @{ */ /** - * @brief Q31 sin_cos function. - * @param[in] theta scaled input value in degrees - * @param[out] *pSinVal points to the processed sine output. - * @param[out] *pCosVal points to the processed cosine output. - * @return none. - * - * The Q31 input value is in the range [-1 0.999999] and is mapped to a degree value in the range [-180 179]. - * + @brief Q31 sin_cos function. + @param[in] theta scaled input value in degrees + @param[out] pSinVal points to processed sine output + @param[out] pCosVal points to processed cosine output + @return none + + The Q31 input value is in the range [-1 0.999999] and is mapped to a degree value in the range [-180 179]. */ void arm_sin_cos_q31( @@ -54,9 +53,9 @@ void arm_sin_cos_q31( q31_t * pSinVal, q31_t * pCosVal) { - q31_t fract; /* Temporary variables for input, output */ - uint16_t indexS, indexC; /* Index variable */ - q31_t f1, f2, d1, d2; /* Two nearest output values */ + q31_t fract; /* Temporary input, output variables */ + uint16_t indexS, indexC; /* Index variable */ + q31_t f1, f2, d1, d2; /* Two nearest output values */ q31_t Dn, Df; q63_t temp; @@ -68,43 +67,44 @@ void arm_sin_cos_q31( fract = (theta - (indexS << CONTROLLER_Q31_SHIFT)) << 8; /* Read two nearest values of input value from the cos & sin tables */ - f1 = sinTable_q31[indexC+0]; - f2 = sinTable_q31[indexC+1]; - d1 = -sinTable_q31[indexS+0]; + f1 = sinTable_q31[indexC ]; + f2 = sinTable_q31[indexC+1]; + d1 = -sinTable_q31[indexS ]; d2 = -sinTable_q31[indexS+1]; - Dn = 0x1921FB5; // delta between the two points (fixed), in this case 2*pi/FAST_MATH_TABLE_SIZE - Df = f2 - f1; // delta between the values of the functions - temp = Dn*((q63_t)d1 + d2); + Dn = 0x1921FB5; /* delta between the two points (fixed), in this case 2*pi/FAST_MATH_TABLE_SIZE */ + Df = f2 - f1; /* delta between the values of the functions */ + + temp = Dn * ((q63_t)d1 + d2); temp = temp - ((q63_t)Df << 32); - temp = (q63_t)fract*(temp >> 31); - temp = temp + ((3*(q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1))*Dn); - temp = (q63_t)fract*(temp >> 31); - temp = temp + (q63_t)d1*Dn; - temp = (q63_t)fract*(temp >> 31); + temp = (q63_t)fract * (temp >> 31); + temp = temp + ((3 * (q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1)) * Dn); + temp = (q63_t)fract * (temp >> 31); + temp = temp + (q63_t)d1 * Dn; + temp = (q63_t)fract * (temp >> 31); /* Calculation of cosine value */ *pCosVal = clip_q63_to_q31((temp >> 31) + (q63_t)f1); /* Read two nearest values of input value from the cos & sin tables */ - f1 = sinTable_q31[indexS+0]; + f1 = sinTable_q31[indexS ]; f2 = sinTable_q31[indexS+1]; - d1 = sinTable_q31[indexC+0]; + d1 = sinTable_q31[indexC ]; d2 = sinTable_q31[indexC+1]; Df = f2 - f1; // delta between the values of the functions - temp = Dn*((q63_t)d1 + d2); + temp = Dn * ((q63_t)d1 + d2); temp = temp - ((q63_t)Df << 32); - temp = (q63_t)fract*(temp >> 31); - temp = temp + ((3*(q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1))*Dn); - temp = (q63_t)fract*(temp >> 31); - temp = temp + (q63_t)d1*Dn; - temp = (q63_t)fract*(temp >> 31); + temp = (q63_t)fract * (temp >> 31); + temp = temp + ((3 * (q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1)) * Dn); + temp = (q63_t)fract * (temp >> 31); + temp = temp + (q63_t)d1 * Dn; + temp = (q63_t)fract * (temp >> 31); /* Calculation of sine value */ *pSinVal = clip_q63_to_q31((temp >> 31) + (q63_t)f1); } /** - * @} end of SinCos group + @} end of SinCos group */ -- cgit