diff options
Diffstat (limited to 'fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q31.c')
| -rw-r--r-- | fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q31.c | 450 |
1 files changed, 0 insertions, 450 deletions
diff --git a/fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q31.c b/fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q31.c deleted file mode 100644 index 3fd3da0..0000000 --- a/fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q31.c +++ /dev/null @@ -1,450 +0,0 @@ -/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_fir_sparse_q31.c
- * Description: Q31 sparse FIR filter processing 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"
-
-
-/**
- * @addtogroup FIR_Sparse
- * @{
- */
-
-/**
- * @brief Processing function for the Q31 sparse FIR filter.
- * @param[in] *S points to an instance of the Q31 sparse FIR structure.
- * @param[in] *pSrc points to the block of input data.
- * @param[out] *pDst points to the block of output data
- * @param[in] *pScratchIn points to a temporary buffer of size blockSize.
- * @param[in] blockSize number of input samples to process per call.
- * @return none.
- *
- * <b>Scaling and Overflow Behavior:</b>
- * \par
- * The function is implemented using an internal 32-bit accumulator.
- * The 1.31 x 1.31 multiplications are truncated to 2.30 format.
- * This leads to loss of precision on the intermediate multiplications and provides only a single guard bit.
- * If the accumulator result overflows, it wraps around rather than saturate.
- * In order to avoid overflows the input signal or coefficients must be scaled down by log2(numTaps) bits.
- */
-
-void arm_fir_sparse_q31(
- arm_fir_sparse_instance_q31 * S,
- q31_t * pSrc,
- q31_t * pDst,
- q31_t * pScratchIn,
- uint32_t blockSize)
-{
-
- q31_t *pState = S->pState; /* State pointer */
- q31_t *pCoeffs = S->pCoeffs; /* Coefficient pointer */
- q31_t *px; /* Scratch buffer pointer */
- q31_t *py = pState; /* Temporary pointers for state buffer */
- q31_t *pb = pScratchIn; /* Temporary pointers for scratch buffer */
- q31_t *pOut; /* Destination pointer */
- q63_t out; /* Temporary output variable */
- int32_t *pTapDelay = S->pTapDelay; /* Pointer to the array containing offset of the non-zero tap values. */
- uint32_t delaySize = S->maxDelay + blockSize; /* state length */
- uint16_t numTaps = S->numTaps; /* Filter order */
- int32_t readIndex; /* Read index of the state buffer */
- uint32_t tapCnt, blkCnt; /* loop counters */
- q31_t coeff = *pCoeffs++; /* Read the first coefficient value */
- q31_t in;
-
-
- /* BlockSize of Input samples are copied into the state buffer */
- /* StateIndex points to the starting position to write in the state buffer */
- arm_circularWrite_f32((int32_t *) py, delaySize, &S->stateIndex, 1,
- (int32_t *) pSrc, 1, blockSize);
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = (int32_t) (S->stateIndex - blockSize) - *pTapDelay++;
-
- /* Wraparound of readIndex */
- if (readIndex < 0)
- {
- readIndex += (int32_t) delaySize;
- }
-
- /* Working pointer for state buffer is updated */
- py = pState;
-
- /* blockSize samples are read from the state buffer */
- arm_circularRead_f32((int32_t *) py, delaySize, &readIndex, 1,
- (int32_t *) pb, (int32_t *) pb, blockSize, 1,
- blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pOut = pDst;
-
-
-#if defined (ARM_MATH_DSP)
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
-
- /* Loop over the blockSize. Unroll by a factor of 4.
- * Compute 4 Multiplications at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiplications and store in the destination buffer */
- *pOut++ = (q31_t) (((q63_t) * px++ * coeff) >> 32);
- *pOut++ = (q31_t) (((q63_t) * px++ * coeff) >> 32);
- *pOut++ = (q31_t) (((q63_t) * px++ * coeff) >> 32);
- *pOut++ = (q31_t) (((q63_t) * px++ * coeff) >> 32);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4,
- * compute the remaining samples */
- blkCnt = blockSize % 0x4U;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiplications and store in the destination buffer */
- *pOut++ = (q31_t) (((q63_t) * px++ * coeff) >> 32);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Load the coefficient value and
- * increment the coefficient buffer for the next set of state values */
- coeff = *pCoeffs++;
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = (int32_t) (S->stateIndex - blockSize) - *pTapDelay++;
-
- /* Wraparound of readIndex */
- if (readIndex < 0)
- {
- readIndex += (int32_t) delaySize;
- }
-
- /* Loop over the number of taps. */
- tapCnt = (uint32_t) numTaps - 2U;
-
- while (tapCnt > 0U)
- {
- /* Working pointer for state buffer is updated */
- py = pState;
-
- /* blockSize samples are read from the state buffer */
- arm_circularRead_f32((int32_t *) py, delaySize, &readIndex, 1,
- (int32_t *) pb, (int32_t *) pb, blockSize, 1,
- blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pOut = pDst;
-
- /* Loop over the blockSize. Unroll by a factor of 4.
- * Compute 4 MACS at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4,
- * compute the remaining samples */
- blkCnt = blockSize % 0x4U;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Load the coefficient value and
- * increment the coefficient buffer for the next set of state values */
- coeff = *pCoeffs++;
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = (int32_t) (S->stateIndex - blockSize) - *pTapDelay++;
-
- /* Wraparound of readIndex */
- if (readIndex < 0)
- {
- readIndex += (int32_t) delaySize;
- }
-
- /* Decrement the tap loop counter */
- tapCnt--;
- }
-
- /* Compute last tap without the final read of pTapDelay */
-
- /* Working pointer for state buffer is updated */
- py = pState;
-
- /* blockSize samples are read from the state buffer */
- arm_circularRead_f32((int32_t *) py, delaySize, &readIndex, 1,
- (int32_t *) pb, (int32_t *) pb, blockSize, 1,
- blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pOut = pDst;
-
- /* Loop over the blockSize. Unroll by a factor of 4.
- * Compute 4 MACS at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4,
- * compute the remaining samples */
- blkCnt = blockSize % 0x4U;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Working output pointer is updated */
- pOut = pDst;
-
- /* Output is converted into 1.31 format. */
- /* Loop over the blockSize. Unroll by a factor of 4.
- * process 4 output samples at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- in = *pOut << 1;
- *pOut++ = in;
- in = *pOut << 1;
- *pOut++ = in;
- in = *pOut << 1;
- *pOut++ = in;
- in = *pOut << 1;
- *pOut++ = in;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4,
- * process the remaining output samples */
- blkCnt = blockSize % 0x4U;
-
- while (blkCnt > 0U)
- {
- in = *pOut << 1;
- *pOut++ = in;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
-#else
-
- /* Run the below code for Cortex-M0 */
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiplications and store in the destination buffer */
- *pOut++ = (q31_t) (((q63_t) * px++ * coeff) >> 32);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Load the coefficient value and
- * increment the coefficient buffer for the next set of state values */
- coeff = *pCoeffs++;
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = (int32_t) (S->stateIndex - blockSize) - *pTapDelay++;
-
- /* Wraparound of readIndex */
- if (readIndex < 0)
- {
- readIndex += (int32_t) delaySize;
- }
-
- /* Loop over the number of taps. */
- tapCnt = (uint32_t) numTaps - 2U;
-
- while (tapCnt > 0U)
- {
- /* Working pointer for state buffer is updated */
- py = pState;
-
- /* blockSize samples are read from the state buffer */
- arm_circularRead_f32((int32_t *) py, delaySize, &readIndex, 1,
- (int32_t *) pb, (int32_t *) pb, blockSize, 1,
- blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pOut = pDst;
-
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Load the coefficient value and
- * increment the coefficient buffer for the next set of state values */
- coeff = *pCoeffs++;
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = (int32_t) (S->stateIndex - blockSize) - *pTapDelay++;
-
- /* Wraparound of readIndex */
- if (readIndex < 0)
- {
- readIndex += (int32_t) delaySize;
- }
-
- /* Decrement the tap loop counter */
- tapCnt--;
- }
-
- /* Compute last tap without the final read of pTapDelay */
-
- /* Working pointer for state buffer is updated */
- py = pState;
-
- /* blockSize samples are read from the state buffer */
- arm_circularRead_f32((int32_t *) py, delaySize, &readIndex, 1,
- (int32_t *) pb, (int32_t *) pb, blockSize, 1,
- blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pOut = pDst;
-
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- out = *pOut;
- out += ((q63_t) * px++ * coeff) >> 32;
- *pOut++ = (q31_t) (out);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Working output pointer is updated */
- pOut = pDst;
-
- /* Output is converted into 1.31 format. */
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- in = *pOut << 1;
- *pOut++ = in;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
-#endif /* #if defined (ARM_MATH_DSP) */
-
-}
-
-/**
- * @} end of FIR_Sparse group
- */
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