From 9c59a184dba820975e5da6fcd5d248aee87f7e2f Mon Sep 17 00:00:00 2001 From: Clyne Sullivan Date: Sun, 2 Feb 2025 11:26:53 -0500 Subject: add l476 implementation --- .../DSP/Source/FastMathFunctions/arm_sin_f32.c | 244 ++++++++++----------- 1 file changed, 122 insertions(+), 122 deletions(-) (limited to 'Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_f32.c') diff --git a/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_f32.c b/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_f32.c index 2fcd6bb..674765e 100644 --- a/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_f32.c +++ b/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_f32.c @@ -1,122 +1,122 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_sin_f32.c - * Description: Fast sine calculation for floating-point values - * - * $Date: 23 April 2021 - * $Revision: V1.9.0 - * - * Target Processor: Cortex-M and Cortex-A cores - * -------------------------------------------------------------------- */ -/* - * Copyright (C) 2010-2021 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 "dsp/fast_math_functions.h" -#include "arm_common_tables.h" - -/** - @ingroup groupFastMath - */ - -/** - @defgroup sin Sine - - Computes the trigonometric sine function using a combination of table lookup - and linear interpolation. There are separate functions for - Q15, Q31, and floating-point data types. - The input to the floating-point version is in radians while the - fixed-point Q15 and Q31 have a scaled input with the range - [0 +0.9999] mapping to [0 2*pi). The fixed-point range is chosen so that a - value of 2*pi wraps around to 0. - - The implementation is based on table lookup using 512 values together with linear interpolation. - The steps used are: - -# Calculation of the nearest integer table index - -# Compute the fractional portion (fract) of the table index. - -# The final result equals (1.0f-fract)*a + fract*b; - - where - 
-     b = Table[index];
-     c = Table[index+1];
-
- */ - -/** - @addtogroup sin - @{ - */ - -/** - @brief Fast approximation to the trigonometric sine function for floating-point data. - @param[in] x input value in radians. - @return sin(x) - */ - -float32_t arm_sin_f32( - float32_t x) -{ - float32_t sinVal, fract, in; /* Temporary input, output variables */ - uint16_t index; /* Index variable */ - float32_t a, b; /* Two nearest output values */ - int32_t n; - float32_t findex; - - /* input x is in radians */ - /* Scale input to [0 1] range from [0 2*PI] , divide input by 2*pi */ - in = x * 0.159154943092f; - - /* Calculation of floor value of input */ - n = (int32_t) in; - - /* Make negative values towards -infinity */ - if (in < 0.0f) - { - n--; - } - - /* Map input value to [0 1] */ - in = in - (float32_t) n; - - /* Calculation of index of the table */ - findex = (float32_t)FAST_MATH_TABLE_SIZE * in; - index = (uint16_t)findex; - - /* when "in" is exactly 1, we need to rotate the index down to 0 */ - if (index >= FAST_MATH_TABLE_SIZE) { - index = 0; - findex -= (float32_t)FAST_MATH_TABLE_SIZE; - } - - /* fractional value calculation */ - fract = findex - (float32_t) index; - - /* Read two nearest values of input value from the sin table */ - a = sinTable_f32[index]; - b = sinTable_f32[index+1]; - - /* Linear interpolation process */ - sinVal = (1.0f - fract) * a + fract * b; - - /* Return output value */ - return (sinVal); -} - -/** - @} end of sin group - */ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_sin_f32.c + * Description: Fast sine calculation for floating-point values + * + * $Date: 18. March 2019 + * $Revision: V1.6.0 + * + * Target Processor: Cortex-M cores + * -------------------------------------------------------------------- */ +/* + * Copyright (C) 2010-2019 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 + */ + +/** + @defgroup sin Sine + + Computes the trigonometric sine function using a combination of table lookup + and linear interpolation. There are separate functions for + Q15, Q31, and floating-point data types. + The input to the floating-point version is in radians while the + fixed-point Q15 and Q31 have a scaled input with the range + [0 +0.9999] mapping to [0 2*pi). The fixed-point range is chosen so that a + value of 2*pi wraps around to 0. + + The implementation is based on table lookup using 256 values together with linear interpolation. + The steps used are: + -# Calculation of the nearest integer table index + -# Compute the fractional portion (fract) of the table index. + -# The final result equals (1.0f-fract)*a + fract*b; + + where + 
+     b = Table[index];
+     c = Table[index+1];
+
+ */ + +/** + @addtogroup sin + @{ + */ + +/** + @brief Fast approximation to the trigonometric sine function for floating-point data. + @param[in] x input value in radians. + @return sin(x) + */ + +float32_t arm_sin_f32( + float32_t x) +{ + float32_t sinVal, fract, in; /* Temporary input, output variables */ + uint16_t index; /* Index variable */ + float32_t a, b; /* Two nearest output values */ + int32_t n; + float32_t findex; + + /* input x is in radians */ + /* Scale input to [0 1] range from [0 2*PI] , divide input by 2*pi */ + in = x * 0.159154943092f; + + /* Calculation of floor value of input */ + n = (int32_t) in; + + /* Make negative values towards -infinity */ + if (in < 0.0f) + { + n--; + } + + /* Map input value to [0 1] */ + in = in - (float32_t) n; + + /* Calculation of index of the table */ + findex = (float32_t)FAST_MATH_TABLE_SIZE * in; + index = (uint16_t)findex; + + /* when "in" is exactly 1, we need to rotate the index down to 0 */ + if (index >= FAST_MATH_TABLE_SIZE) { + index = 0; + findex -= (float32_t)FAST_MATH_TABLE_SIZE; + } + + /* fractional value calculation */ + fract = findex - (float32_t) index; + + /* Read two nearest values of input value from the sin table */ + a = sinTable_f32[index]; + b = sinTable_f32[index+1]; + + /* Linear interpolation process */ + sinVal = (1.0f - fract) * a + fract * b; + + /* Return output value */ + return (sinVal); +} + +/** + @} end of sin group + */ -- cgit v1.2.3