| #include "ref.h" |
| |
| void ref_fir_sparse_f32( |
| arm_fir_sparse_instance_f32 * S, |
| float32_t * pSrc, |
| float32_t * pDst, |
| float32_t * pScratchIn, |
| uint32_t blockSize) |
| { |
| float32_t *pState = S->pState; /* State pointer */ |
| const float32_t *pCoeffs = S->pCoeffs; /* Coefficient pointer */ |
| float32_t *px; /* Scratch buffer pointer */ |
| float32_t *py = pState; /* Temporary pointers for state buffer */ |
| float32_t *pb = pScratchIn; /* Temporary pointers for scratch buffer */ |
| float32_t *pOut; /* 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; /* Number of filter coefficients in the filter */ |
| int32_t readIndex; /* Read index of the state buffer */ |
| uint32_t tapCnt, blkCnt; /* loop counters */ |
| float32_t coeff = *pCoeffs++; /* Read the first coefficient value */ |
| |
| |
| /* 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 - (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_f32((int32_t *) py, delaySize, &readIndex, 1, |
| (int32_t *) pb, (int32_t *) pb, blockSize, 1, |
| blockSize); |
| |
| /* Working pointer for the scratch buffer */ |
| px = pb; |
| |
| /* Working pointer for destination buffer */ |
| pOut = pDst; |
| |
| blkCnt = blockSize; |
| |
| while (blkCnt > 0U) |
| { |
| /* Perform Multiplications and store in destination buffer */ |
| *pOut++ = *px++ * coeff; |
| |
| /* Decrement the loop counter */ |
| blkCnt--; |
| } |
| |
| /* Loop over the number of taps. */ |
| tapCnt = (uint32_t) numTaps - 1U; |
| |
| while (tapCnt > 0U) |
| { |
| /* 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; |
| } |
| |
| /* 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 */ |
| px = pb; |
| |
| /* Working pointer for destination buffer */ |
| pOut = pDst; |
| |
| blkCnt = blockSize; |
| |
| while (blkCnt > 0U) |
| { |
| /* Perform Multiply-Accumulate */ |
| *pOut++ += *px++ * coeff; |
| |
| /* Decrement the loop counter */ |
| blkCnt--; |
| } |
| |
| /* Decrement the tap loop counter */ |
| tapCnt--; |
| } |
| } |
| |
| void ref_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 */ |
| const 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; |
| |
| 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--; |
| } |
| |
| /* Loop over the number of taps. */ |
| tapCnt = (uint32_t) numTaps - 1U; |
| |
| while (tapCnt > 0U) |
| { |
| /* 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; |
| } |
| |
| /* 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--; |
| } |
| |
| /* Decrement the tap loop counter */ |
| tapCnt--; |
| } |
| |
| /* 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--; |
| } |
| } |
| |
| void ref_fir_sparse_q15( |
| arm_fir_sparse_instance_q15 * S, |
| q15_t * pSrc, |
| q15_t * pDst, |
| q15_t * pScratchIn, |
| q31_t * pScratchOut, |
| uint32_t blockSize) |
| { |
| q15_t *pState = S->pState; /* State pointer */ |
| const q15_t *pCoeffs = S->pCoeffs; /* Coefficient pointer */ |
| q15_t *pIn = pSrc; /* Working pointer for input */ |
| q15_t *pOut = pDst; /* Working pointer for output */ |
| q15_t *px; /* Temporary pointers for scratch buffer */ |
| q15_t *pb = pScratchIn; /* Temporary pointers for scratch buffer */ |
| q15_t *py = pState; /* Temporary pointers for state buffer */ |
| 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 */ |
| q15_t coeff = *pCoeffs++; /* Read the first coefficient value */ |
| q31_t *pScr2 = pScratchOut; /* Working pointer for pScratchOut */ |
| |
| /* BlockSize of Input samples are copied into the state buffer */ |
| /* StateIndex points to the starting position to write in the state buffer */ |
| arm_circularWrite_q15(py, delaySize, &S->stateIndex, 1, pIn, 1, blockSize); |
| |
| /* Loop over the number of taps. */ |
| tapCnt = numTaps; |
| |
| /* Read Index, from where the state buffer should be read, is calculated. */ |
| readIndex = (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_q15(py, delaySize, &readIndex, 1, |
| pb, pb, blockSize, 1, blockSize); |
| |
| /* Working pointer for the scratch buffer of state values */ |
| px = pb; |
| |
| /* Working pointer for scratch buffer of output values */ |
| pScratchOut = pScr2; |
| |
| blkCnt = blockSize; |
| |
| while (blkCnt > 0U) |
| { |
| /* Perform multiplication and store in the scratch buffer */ |
| *pScratchOut++ = ((q31_t) * px++ * coeff); |
| |
| /* Decrement the loop counter */ |
| blkCnt--; |
| } |
| |
| /* Loop over the number of taps. */ |
| tapCnt = (uint32_t) numTaps - 1U; |
| |
| while (tapCnt > 0U) |
| { |
| /* 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 = (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_q15(py, delaySize, &readIndex, 1, |
| pb, pb, blockSize, 1, blockSize); |
| |
| /* Working pointer for the scratch buffer of state values */ |
| px = pb; |
| |
| /* Working pointer for scratch buffer of output values */ |
| pScratchOut = pScr2; |
| |
| blkCnt = blockSize; |
| |
| while (blkCnt > 0U) |
| { |
| /* Perform Multiply-Accumulate */ |
| *pScratchOut++ += (q31_t) * px++ * coeff; |
| |
| /* Decrement the loop counter */ |
| blkCnt--; |
| } |
| |
| /* Decrement the tap loop counter */ |
| tapCnt--; |
| } |
| |
| /* 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++ = (q15_t) __SSAT(*pScr2++ >> 15, 16); |
| blkCnt--; |
| } |
| } |
| |
| void ref_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 */ |
| const 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; |
| |
| /* 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--; |
| } |
| |
| /* Loop over the number of taps. */ |
| tapCnt = (uint32_t) numTaps - 1U; |
| |
| while (tapCnt > 0U) |
| { |
| /* 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; |
| } |
| |
| /* 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--; |
| } |
| |
| /* Decrement the tap loop counter */ |
| tapCnt--; |
| } |
| |
| /* 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--; |
| } |
| } |