diff options
Diffstat (limited to 'fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q7.c')
| -rw-r--r-- | fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q7.c | 469 |
1 files changed, 0 insertions, 469 deletions
diff --git a/fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q7.c b/fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q7.c deleted file mode 100644 index 252ba95..0000000 --- a/fw/hid-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_fir_sparse_q7.c +++ /dev/null @@ -1,469 +0,0 @@ -/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_fir_sparse_q7.c
- * Description: Q7 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"
-
-
-/**
- * @ingroup groupFilters
- */
-
-/**
- * @addtogroup FIR_Sparse
- * @{
- */
-
-
-/**
- * @brief Processing function for the Q7 sparse FIR filter.
- * @param[in] *S points to an instance of the Q7 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] *pScratchOut 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 a 32-bit internal accumulator.
- * Both coefficients and state variables are represented in 1.7 format and multiplications yield a 2.14 result.
- * The 2.14 intermediate results are accumulated in a 32-bit accumulator in 18.14 format.
- * There is no risk of internal overflow with this approach and the full precision of intermediate multiplications is preserved.
- * The accumulator is then converted to 18.7 format by discarding the low 7 bits.
- * Finally, the result is truncated to 1.7 format.
- */
-
-void arm_fir_sparse_q7(
- arm_fir_sparse_instance_q7 * S,
- q7_t * pSrc,
- q7_t * pDst,
- q7_t * pScratchIn,
- q31_t * pScratchOut,
- uint32_t blockSize)
-{
-
- q7_t *pState = S->pState; /* State pointer */
- q7_t *pCoeffs = S->pCoeffs; /* Coefficient pointer */
- q7_t *px; /* Scratch buffer pointer */
- q7_t *py = pState; /* Temporary pointers for state buffer */
- q7_t *pb = pScratchIn; /* Temporary pointers for scratch buffer */
- q7_t *pOut = pDst; /* Destination pointer */
- 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 */
- q7_t coeff = *pCoeffs++; /* Read the coefficient value */
- q31_t *pScr2 = pScratchOut; /* Working pointer for scratch buffer of output values */
- q31_t in;
-
-
-#if defined (ARM_MATH_DSP)
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
-
- q7_t in1, in2, in3, in4;
-
- /* BlockSize of Input samples are copied into the state buffer */
- /* StateIndex points to the starting position to write in the state buffer */
- arm_circularWrite_q7(py, (int32_t) delaySize, &S->stateIndex, 1, pSrc, 1,
- blockSize);
-
- /* Loop over the number of taps. */
- tapCnt = numTaps;
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = ((int32_t) S->stateIndex - (int32_t) 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_q7(py, (int32_t) delaySize, &readIndex, 1, pb, pb,
- (int32_t) blockSize, 1, blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pScratchOut = pScr2;
-
- /* Loop over the blockSize. Unroll by a factor of 4.
- * Compute 4 multiplications at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- /* Perform multiplication and store in the scratch buffer */
- *pScratchOut++ = ((q31_t) * px++ * coeff);
- *pScratchOut++ = ((q31_t) * px++ * coeff);
- *pScratchOut++ = ((q31_t) * px++ * coeff);
- *pScratchOut++ = ((q31_t) * px++ * coeff);
-
- /* 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 multiplication and store in the scratch buffer */
- *pScratchOut++ = ((q31_t) * px++ * coeff);
-
- /* 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 - (int32_t) 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_q7(py, (int32_t) delaySize, &readIndex, 1, pb, pb,
- (int32_t) blockSize, 1, blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pScratchOut = pScr2;
-
- /* Loop over the blockSize. Unroll by a factor of 4.
- * Compute 4 MACS at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
-
- /* 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 */
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
-
- /* 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 -
- (int32_t) 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_q7(py, (int32_t) delaySize, &readIndex, 1, pb, pb,
- (int32_t) blockSize, 1, blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pScratchOut = pScr2;
-
- /* Loop over the blockSize. Unroll by a factor of 4.
- * Compute 4 MACS at a time. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
-
- /* 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 */
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* All the output values are in pScratchOut buffer.
- Convert them into 1.15 format, saturate and store in the destination buffer. */
- /* Loop over the blockSize. */
- blkCnt = blockSize >> 2;
-
- while (blkCnt > 0U)
- {
- in1 = (q7_t) __SSAT(*pScr2++ >> 7, 8);
- in2 = (q7_t) __SSAT(*pScr2++ >> 7, 8);
- in3 = (q7_t) __SSAT(*pScr2++ >> 7, 8);
- in4 = (q7_t) __SSAT(*pScr2++ >> 7, 8);
-
- *__SIMD32(pOut)++ = __PACKq7(in1, in2, in3, in4);
-
- /* Decrement the blockSize loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4,
- remaining samples are processed in the below loop */
- blkCnt = blockSize % 0x4U;
-
- while (blkCnt > 0U)
- {
- *pOut++ = (q7_t) __SSAT(*pScr2++ >> 7, 8);
-
- /* Decrement the blockSize loop counter */
- blkCnt--;
- }
-
-#else
-
- /* Run the below code for Cortex-M0 */
-
- /* BlockSize of Input samples are copied into the state buffer */
- /* StateIndex points to the starting position to write in the state buffer */
- arm_circularWrite_q7(py, (int32_t) delaySize, &S->stateIndex, 1, pSrc, 1,
- blockSize);
-
- /* Loop over the number of taps. */
- tapCnt = numTaps;
-
- /* Read Index, from where the state buffer should be read, is calculated. */
- readIndex = ((int32_t) S->stateIndex - (int32_t) 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_q7(py, (int32_t) delaySize, &readIndex, 1, pb, pb,
- (int32_t) blockSize, 1, blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pScratchOut = pScr2;
-
- /* Loop over the blockSize */
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- /* Perform multiplication and store in the scratch buffer */
- *pScratchOut++ = ((q31_t) * px++ * coeff);
-
- /* 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 - (int32_t) 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_q7(py, (int32_t) delaySize, &readIndex, 1, pb, pb,
- (int32_t) blockSize, 1, blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pScratchOut = pScr2;
-
- /* Loop over the blockSize */
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
-
- /* 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 - (int32_t) 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_q7(py, (int32_t) delaySize, &readIndex, 1, pb, pb,
- (int32_t) blockSize, 1, blockSize);
-
- /* Working pointer for the scratch buffer of state values */
- px = pb;
-
- /* Working pointer for scratch buffer of output values */
- pScratchOut = pScr2;
-
- /* Loop over the blockSize */
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- /* Perform Multiply-Accumulate */
- in = *pScratchOut + ((q31_t) * px++ * coeff);
- *pScratchOut++ = in;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* All the output values are in pScratchOut buffer.
- Convert them into 1.15 format, saturate and store in the destination buffer. */
- /* Loop over the blockSize. */
- blkCnt = blockSize;
-
- while (blkCnt > 0U)
- {
- *pOut++ = (q7_t) __SSAT(*pScr2++ >> 7, 8);
-
- /* Decrement the blockSize loop counter */
- blkCnt--;
- }
-
-#endif /* #if defined (ARM_MATH_DSP) */
-
-}
-
-/**
- * @} end of FIR_Sparse group
- */
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