jaseg/st-cmsis-core-lowfat
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Official ARM version: v5.6.0

Browse source
This commit is contained in:
rihab kouki 2020-07-28 11:24:49 +01:00
parent 9f95ff5b6b
commit 96d6da4e25
2939 changed files with 339304 additions and 113320 deletions
Download patch file Download diff file Expand all files Collapse all files

79
DSP/Source/TransformFunctions/arm_bitreversal.c
View file

@ -3,13 +3,13 @@
* Title: arm_bitreversal.c
* Description: Bitreversal functions
*
* $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
*
@ -29,20 +29,20 @@
#include "arm_math.h"
#include "arm_common_tables.h"
/*
* @brief In-place bit reversal function.
* @param[in, out] *pSrc points to the in-place buffer of floating-point data type.
* @param[in] fftSize length of the FFT.
* @param[in] bitRevFactor bit reversal modifier that supports different size FFTs with the same bit reversal table.
* @param[in] *pBitRevTab points to the bit reversal table.
* @return none.
*/
/**
@brief In-place floating-point bit reversal function.
@param[in,out] pSrc points to in-place floating-point data buffer
@param[in] fftSize length of FFT
@param[in] bitRevFactor bit reversal modifier that supports different size FFTs with the same bit reversal table
@param[in] pBitRevTab points to bit reversal table
@return none
*/
void arm_bitreversal_f32(
float32_t * pSrc,
uint16_t fftSize,
uint16_t bitRevFactor,
uint16_t * pBitRevTab)
float32_t * pSrc,
uint16_t fftSize,
uint16_t bitRevFactor,
const uint16_t * pBitRevTab)
{
uint16_t fftLenBy2, fftLenBy2p1;
uint16_t i, j;
@ -100,21 +100,20 @@ uint16_t * pBitRevTab)
}
/*
* @brief In-place bit reversal function.
* @param[in, out] *pSrc points to the in-place buffer of Q31 data type.
* @param[in] fftLen length of the FFT.
* @param[in] bitRevFactor bit reversal modifier that supports different size FFTs with the same bit reversal table
* @param[in] *pBitRevTab points to bit reversal table.
* @return none.
/**
@brief In-place Q31 bit reversal function.
@param[in,out] pSrc points to in-place Q31 data buffer.
@param[in] fftLen length of FFT.
@param[in] bitRevFactor bit reversal modifier that supports different size FFTs with the same bit reversal table
@param[in] pBitRevTab points to bit reversal table
@return none
*/
void arm_bitreversal_q31(
q31_t * pSrc,
uint32_t fftLen,
uint16_t bitRevFactor,
uint16_t * pBitRevTable)
q31_t * pSrc,
uint32_t fftLen,
uint16_t bitRevFactor,
const uint16_t * pBitRevTab)
{
uint32_t fftLenBy2, fftLenBy2p1, i, j;
q31_t in;
@ -163,29 +162,29 @@ uint16_t * pBitRevTable)
pSrc[(2U * (j + fftLenBy2)) + 1U] = in;
/* Reading the index for the bit reversal */
j = *pBitRevTable;
j = *pBitRevTab;
/* Updating the bit reversal index depending on the fft length */
pBitRevTable += bitRevFactor;
pBitRevTab += bitRevFactor;
}
}
/*
* @brief In-place bit reversal function.
* @param[in, out] *pSrc points to the in-place buffer of Q15 data type.
* @param[in] fftLen length of the FFT.
* @param[in] bitRevFactor bit reversal modifier that supports different size FFTs with the same bit reversal table
* @param[in] *pBitRevTab points to bit reversal table.
* @return none.
/**
@brief In-place Q15 bit reversal function.
@param[in,out] pSrc16 points to in-place Q15 data buffer
@param[in] fftLen length of FFT
@param[in] bitRevFactor bit reversal modifier that supports different size FFTs with the same bit reversal table
@param[in] pBitRevTab points to bit reversal table
@return none
*/
void arm_bitreversal_q15(
q15_t * pSrc16,
uint32_t fftLen,
uint16_t bitRevFactor,
uint16_t * pBitRevTab)
q15_t * pSrc16,
uint32_t fftLen,
uint16_t bitRevFactor,
const uint16_t * pBitRevTab)
{
q31_t *pSrc = (q31_t *) pSrc16;
q31_t in;