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Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_lms_norm_q31.c')
-rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_lms_norm_q31.c | 431 |
1 files changed, 0 insertions, 431 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_lms_norm_q31.c b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_lms_norm_q31.c deleted file mode 100644 index 223816a048..0000000000 --- a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_lms_norm_q31.c +++ /dev/null @@ -1,431 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2013 ARM Limited. All rights reserved. -* -* $Date: 17. January 2013 -* $Revision: V1.4.1 -* -* Project: CMSIS DSP Library -* Title: arm_lms_norm_q31.c -* -* Description: Processing function for the Q31 NLMS filter. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#include "arm_math.h" - -/** - * @ingroup groupFilters - */ - -/** - * @addtogroup LMS_NORM - * @{ - */ - -/** -* @brief Processing function for Q31 normalized LMS filter. -* @param[in] *S points to an instance of the Q31 normalized LMS filter structure. -* @param[in] *pSrc points to the block of input data. -* @param[in] *pRef points to the block of reference data. -* @param[out] *pOut points to the block of output data. -* @param[out] *pErr points to the block of error data. -* @param[in] blockSize number of samples to process. -* @return none. -* -* <b>Scaling and Overflow Behavior:</b> -* \par -* The function is implemented using an internal 64-bit accumulator. -* The accumulator has a 2.62 format and maintains full precision of the intermediate -* multiplication results but provides only a single guard bit. -* Thus, if the accumulator result overflows it wraps around rather than clip. -* In order to avoid overflows completely the input signal must be scaled down by -* log2(numTaps) bits. The reference signal should not be scaled down. -* After all multiply-accumulates are performed, the 2.62 accumulator is shifted -* and saturated to 1.31 format to yield the final result. -* The output signal and error signal are in 1.31 format. -* -* \par -* In this filter, filter coefficients are updated for each sample and the -* updation of filter cofficients are saturted. -* -*/ - -void arm_lms_norm_q31( - arm_lms_norm_instance_q31 * S, - q31_t * pSrc, - q31_t * pRef, - q31_t * pOut, - q31_t * pErr, - uint32_t blockSize) -{ - q31_t *pState = S->pState; /* State pointer */ - q31_t *pCoeffs = S->pCoeffs; /* Coefficient pointer */ - q31_t *pStateCurnt; /* Points to the current sample of the state */ - q31_t *px, *pb; /* Temporary pointers for state and coefficient buffers */ - q31_t mu = S->mu; /* Adaptive factor */ - uint32_t numTaps = S->numTaps; /* Number of filter coefficients in the filter */ - uint32_t tapCnt, blkCnt; /* Loop counters */ - q63_t energy; /* Energy of the input */ - q63_t acc; /* Accumulator */ - q31_t e = 0, d = 0; /* error, reference data sample */ - q31_t w = 0, in; /* weight factor and state */ - q31_t x0; /* temporary variable to hold input sample */ -// uint32_t shift = 32u - ((uint32_t) S->postShift + 1u); /* Shift to be applied to the output */ - q31_t errorXmu, oneByEnergy; /* Temporary variables to store error and mu product and reciprocal of energy */ - q31_t postShift; /* Post shift to be applied to weight after reciprocal calculation */ - q31_t coef; /* Temporary variable for coef */ - q31_t acc_l, acc_h; /* temporary input */ - uint32_t uShift = ((uint32_t) S->postShift + 1u); - uint32_t lShift = 32u - uShift; /* Shift to be applied to the output */ - - energy = S->energy; - x0 = S->x0; - - /* S->pState points to buffer which contains previous frame (numTaps - 1) samples */ - /* pStateCurnt points to the location where the new input data should be written */ - pStateCurnt = &(S->pState[(numTaps - 1u)]); - - /* Loop over blockSize number of values */ - blkCnt = blockSize; - - -#ifndef ARM_MATH_CM0_FAMILY - - /* Run the below code for Cortex-M4 and Cortex-M3 */ - - while(blkCnt > 0u) - { - - /* Copy the new input sample into the state buffer */ - *pStateCurnt++ = *pSrc; - - /* Initialize pState pointer */ - px = pState; - - /* Initialize coeff pointer */ - pb = (pCoeffs); - - /* Read the sample from input buffer */ - in = *pSrc++; - - /* Update the energy calculation */ - energy = (q31_t) ((((q63_t) energy << 32) - - (((q63_t) x0 * x0) << 1)) >> 32); - energy = (q31_t) (((((q63_t) in * in) << 1) + (energy << 32)) >> 32); - - /* Set the accumulator to zero */ - acc = 0; - - /* Loop unrolling. Process 4 taps at a time. */ - tapCnt = numTaps >> 2; - - while(tapCnt > 0u) - { - /* Perform the multiply-accumulate */ - acc += ((q63_t) (*px++)) * (*pb++); - acc += ((q63_t) (*px++)) * (*pb++); - acc += ((q63_t) (*px++)) * (*pb++); - acc += ((q63_t) (*px++)) * (*pb++); - - /* Decrement the loop counter */ - tapCnt--; - } - - /* If the filter length is not a multiple of 4, compute the remaining filter taps */ - tapCnt = numTaps % 0x4u; - - while(tapCnt > 0u) - { - /* Perform the multiply-accumulate */ - acc += ((q63_t) (*px++)) * (*pb++); - - /* Decrement the loop counter */ - tapCnt--; - } - - /* Converting the result to 1.31 format */ - /* Calc lower part of acc */ - acc_l = acc & 0xffffffff; - - /* Calc upper part of acc */ - acc_h = (acc >> 32) & 0xffffffff; - - acc = (uint32_t) acc_l >> lShift | acc_h << uShift; - - /* Store the result from accumulator into the destination buffer. */ - *pOut++ = (q31_t) acc; - - /* Compute and store error */ - d = *pRef++; - e = d - (q31_t) acc; - *pErr++ = e; - - /* Calculates the reciprocal of energy */ - postShift = arm_recip_q31(energy + DELTA_Q31, - &oneByEnergy, &S->recipTable[0]); - - /* Calculation of product of (e * mu) */ - errorXmu = (q31_t) (((q63_t) e * mu) >> 31); - - /* Weighting factor for the normalized version */ - w = clip_q63_to_q31(((q63_t) errorXmu * oneByEnergy) >> (31 - postShift)); - - /* Initialize pState pointer */ - px = pState; - - /* Initialize coeff pointer */ - pb = (pCoeffs); - - /* Loop unrolling. Process 4 taps at a time. */ - tapCnt = numTaps >> 2; - - /* Update filter coefficients */ - while(tapCnt > 0u) - { - /* Perform the multiply-accumulate */ - - /* coef is in 2.30 format */ - coef = (q31_t) (((q63_t) w * (*px++)) >> (32)); - /* get coef in 1.31 format by left shifting */ - *pb = clip_q63_to_q31((q63_t) * pb + (coef << 1u)); - /* update coefficient buffer to next coefficient */ - pb++; - - coef = (q31_t) (((q63_t) w * (*px++)) >> (32)); - *pb = clip_q63_to_q31((q63_t) * pb + (coef << 1u)); - pb++; - - coef = (q31_t) (((q63_t) w * (*px++)) >> (32)); - *pb = clip_q63_to_q31((q63_t) * pb + (coef << 1u)); - pb++; - - coef = (q31_t) (((q63_t) w * (*px++)) >> (32)); - *pb = clip_q63_to_q31((q63_t) * pb + (coef << 1u)); - pb++; - - /* Decrement the loop counter */ - tapCnt--; - } - - /* If the filter length is not a multiple of 4, compute the remaining filter taps */ - tapCnt = numTaps % 0x4u; - - while(tapCnt > 0u) - { - /* Perform the multiply-accumulate */ - coef = (q31_t) (((q63_t) w * (*px++)) >> (32)); - *pb = clip_q63_to_q31((q63_t) * pb + (coef << 1u)); - pb++; - - /* Decrement the loop counter */ - tapCnt--; - } - - /* Read the sample from state buffer */ - x0 = *pState; - - /* Advance state pointer by 1 for the next sample */ - pState = pState + 1; - - /* Decrement the loop counter */ - blkCnt--; - } - - /* Save energy and x0 values for the next frame */ - S->energy = (q31_t) energy; - S->x0 = x0; - - /* Processing is complete. Now copy the last numTaps - 1 samples to the - satrt of the state buffer. This prepares the state buffer for the - next function call. */ - - /* Points to the start of the pState buffer */ - pStateCurnt = S->pState; - - /* Loop unrolling for (numTaps - 1u) samples copy */ - tapCnt = (numTaps - 1u) >> 2u; - - /* copy data */ - while(tapCnt > 0u) - { - *pStateCurnt++ = *pState++; - *pStateCurnt++ = *pState++; - *pStateCurnt++ = *pState++; - *pStateCurnt++ = *pState++; - - /* Decrement the loop counter */ - tapCnt--; - } - - /* Calculate remaining number of copies */ - tapCnt = (numTaps - 1u) % 0x4u; - - /* Copy the remaining q31_t data */ - while(tapCnt > 0u) - { - *pStateCurnt++ = *pState++; - - /* Decrement the loop counter */ - tapCnt--; - } - -#else - - /* Run the below code for Cortex-M0 */ - - while(blkCnt > 0u) - { - - /* Copy the new input sample into the state buffer */ - *pStateCurnt++ = *pSrc; - - /* Initialize pState pointer */ - px = pState; - - /* Initialize pCoeffs pointer */ - pb = pCoeffs; - - /* Read the sample from input buffer */ - in = *pSrc++; - - /* Update the energy calculation */ - energy = - (q31_t) ((((q63_t) energy << 32) - (((q63_t) x0 * x0) << 1)) >> 32); - energy = (q31_t) (((((q63_t) in * in) << 1) + (energy << 32)) >> 32); - - /* Set the accumulator to zero */ - acc = 0; - - /* Loop over numTaps number of values */ - tapCnt = numTaps; - - while(tapCnt > 0u) - { - /* Perform the multiply-accumulate */ - acc += ((q63_t) (*px++)) * (*pb++); - - /* Decrement the loop counter */ - tapCnt--; - } - - /* Converting the result to 1.31 format */ - /* Converting the result to 1.31 format */ - /* Calc lower part of acc */ - acc_l = acc & 0xffffffff; - - /* Calc upper part of acc */ - acc_h = (acc >> 32) & 0xffffffff; - - acc = (uint32_t) acc_l >> lShift | acc_h << uShift; - - - //acc = (q31_t) (acc >> shift); - - /* Store the result from accumulator into the destination buffer. */ - *pOut++ = (q31_t) acc; - - /* Compute and store error */ - d = *pRef++; - e = d - (q31_t) acc; - *pErr++ = e; - - /* Calculates the reciprocal of energy */ - postShift = - arm_recip_q31(energy + DELTA_Q31, &oneByEnergy, &S->recipTable[0]); - - /* Calculation of product of (e * mu) */ - errorXmu = (q31_t) (((q63_t) e * mu) >> 31); - - /* Weighting factor for the normalized version */ - w = clip_q63_to_q31(((q63_t) errorXmu * oneByEnergy) >> (31 - postShift)); - - /* Initialize pState pointer */ - px = pState; - - /* Initialize coeff pointer */ - pb = (pCoeffs); - - /* Loop over numTaps number of values */ - tapCnt = numTaps; - - while(tapCnt > 0u) - { - /* Perform the multiply-accumulate */ - /* coef is in 2.30 format */ - coef = (q31_t) (((q63_t) w * (*px++)) >> (32)); - /* get coef in 1.31 format by left shifting */ - *pb = clip_q63_to_q31((q63_t) * pb + (coef << 1u)); - /* update coefficient buffer to next coefficient */ - pb++; - - /* Decrement the loop counter */ - tapCnt--; - } - - /* Read the sample from state buffer */ - x0 = *pState; - - /* Advance state pointer by 1 for the next sample */ - pState = pState + 1; - - /* Decrement the loop counter */ - blkCnt--; - } - - /* Save energy and x0 values for the next frame */ - S->energy = (q31_t) energy; - S->x0 = x0; - - /* Processing is complete. Now copy the last numTaps - 1 samples to the - start of the state buffer. This prepares the state buffer for the - next function call. */ - - /* Points to the start of the pState buffer */ - pStateCurnt = S->pState; - - /* Loop for (numTaps - 1u) samples copy */ - tapCnt = (numTaps - 1u); - - /* Copy the remaining q31_t data */ - while(tapCnt > 0u) - { - *pStateCurnt++ = *pState++; - - /* Decrement the loop counter */ - tapCnt--; - } - -#endif /* #ifndef ARM_MATH_CM0_FAMILY */ - -} - -/** - * @} end of LMS_NORM group - */ |