123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765 |
- /* ----------------------------------------------------------------------
- * Copyright (C) 2010-2013 ARM Limited. All rights reserved.
- *
- * $Date: 17. January 2013
- * $Revision: V1.4.1
- *
- * Project: CMSIS DSP Library
- * Title: arm_conv_partial_opt_q15.c
- *
- * Description: Partial convolution of Q15 sequences.
- *
- * Target Processor: Cortex-M4/Cortex-M3
- *
- * 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 PartialConv
- * @{
- */
-
- /**
- * @brief Partial convolution of Q15 sequences.
- * @param[in] *pSrcA points to the first input sequence.
- * @param[in] srcALen length of the first input sequence.
- * @param[in] *pSrcB points to the second input sequence.
- * @param[in] srcBLen length of the second input sequence.
- * @param[out] *pDst points to the location where the output result is written.
- * @param[in] firstIndex is the first output sample to start with.
- * @param[in] numPoints is the number of output points to be computed.
- * @param[in] *pScratch1 points to scratch buffer of size max(srcALen, srcBLen) + 2*min(srcALen, srcBLen) - 2.
- * @param[in] *pScratch2 points to scratch buffer of size min(srcALen, srcBLen).
- * @return Returns either ARM_MATH_SUCCESS if the function completed correctly or ARM_MATH_ARGUMENT_ERROR if the requested subset is not in the range [0 srcALen+srcBLen-2].
- *
- * \par Restrictions
- * If the silicon does not support unaligned memory access enable the macro UNALIGNED_SUPPORT_DISABLE
- * In this case input, output, state buffers should be aligned by 32-bit
- *
- * Refer to <code>arm_conv_partial_fast_q15()</code> for a faster but less precise version of this function for Cortex-M3 and Cortex-M4.
- *
- *
- */
-
- #ifndef UNALIGNED_SUPPORT_DISABLE
-
- arm_status arm_conv_partial_opt_q15(
- q15_t * pSrcA,
- uint32_t srcALen,
- q15_t * pSrcB,
- uint32_t srcBLen,
- q15_t * pDst,
- uint32_t firstIndex,
- uint32_t numPoints,
- q15_t * pScratch1,
- q15_t * pScratch2)
- {
-
- q15_t *pOut = pDst; /* output pointer */
- q15_t *pScr1 = pScratch1; /* Temporary pointer for scratch1 */
- q15_t *pScr2 = pScratch2; /* Temporary pointer for scratch1 */
- q63_t acc0, acc1, acc2, acc3; /* Accumulator */
- q31_t x1, x2, x3; /* Temporary variables to hold state and coefficient values */
- q31_t y1, y2; /* State variables */
- q15_t *pIn1; /* inputA pointer */
- q15_t *pIn2; /* inputB pointer */
- q15_t *px; /* Intermediate inputA pointer */
- q15_t *py; /* Intermediate inputB pointer */
- uint32_t j, k, blkCnt; /* loop counter */
- arm_status status; /* Status variable */
- uint32_t tapCnt; /* loop count */
-
- /* Check for range of output samples to be calculated */
- if((firstIndex + numPoints) > ((srcALen + (srcBLen - 1u))))
- {
- /* Set status as ARM_MATH_ARGUMENT_ERROR */
- status = ARM_MATH_ARGUMENT_ERROR;
- }
- else
- {
-
- /* The algorithm implementation is based on the lengths of the inputs. */
- /* srcB is always made to slide across srcA. */
- /* So srcBLen is always considered as shorter or equal to srcALen */
- if(srcALen >= srcBLen)
- {
- /* Initialization of inputA pointer */
- pIn1 = pSrcA;
-
- /* Initialization of inputB pointer */
- pIn2 = pSrcB;
- }
- else
- {
- /* Initialization of inputA pointer */
- pIn1 = pSrcB;
-
- /* Initialization of inputB pointer */
- pIn2 = pSrcA;
-
- /* srcBLen is always considered as shorter or equal to srcALen */
- j = srcBLen;
- srcBLen = srcALen;
- srcALen = j;
- }
-
- /* Temporary pointer for scratch2 */
- py = pScratch2;
-
- /* pointer to take end of scratch2 buffer */
- pScr2 = pScratch2 + srcBLen - 1;
-
- /* points to smaller length sequence */
- px = pIn2;
-
- /* Apply loop unrolling and do 4 Copies simultaneously. */
- k = srcBLen >> 2u;
-
- /* First part of the processing with loop unrolling copies 4 data points at a time.
- ** a second loop below copies for the remaining 1 to 3 samples. */
- while(k > 0u)
- {
- /* copy second buffer in reversal manner */
- *pScr2-- = *px++;
- *pScr2-- = *px++;
- *pScr2-- = *px++;
- *pScr2-- = *px++;
-
- /* Decrement the loop counter */
- k--;
- }
-
- /* If the count is not a multiple of 4, copy remaining samples here.
- ** No loop unrolling is used. */
- k = srcBLen % 0x4u;
-
- while(k > 0u)
- {
- /* copy second buffer in reversal manner for remaining samples */
- *pScr2-- = *px++;
-
- /* Decrement the loop counter */
- k--;
- }
-
- /* Initialze temporary scratch pointer */
- pScr1 = pScratch1;
-
- /* Fill (srcBLen - 1u) zeros in scratch buffer */
- arm_fill_q15(0, pScr1, (srcBLen - 1u));
-
- /* Update temporary scratch pointer */
- pScr1 += (srcBLen - 1u);
-
- /* Copy bigger length sequence(srcALen) samples in scratch1 buffer */
-
- /* Copy (srcALen) samples in scratch buffer */
- arm_copy_q15(pIn1, pScr1, srcALen);
-
- /* Update pointers */
- pScr1 += srcALen;
-
- /* Fill (srcBLen - 1u) zeros at end of scratch buffer */
- arm_fill_q15(0, pScr1, (srcBLen - 1u));
-
- /* Update pointer */
- pScr1 += (srcBLen - 1u);
-
- /* Initialization of pIn2 pointer */
- pIn2 = py;
-
- pScratch1 += firstIndex;
-
- pOut = pDst + firstIndex;
-
- /* Actual convolution process starts here */
- blkCnt = (numPoints) >> 2;
-
- while(blkCnt > 0)
- {
- /* Initialze temporary scratch pointer as scratch1 */
- pScr1 = pScratch1;
-
- /* Clear Accumlators */
- acc0 = 0;
- acc1 = 0;
- acc2 = 0;
- acc3 = 0;
-
- /* Read two samples from scratch1 buffer */
- x1 = *__SIMD32(pScr1)++;
-
- /* Read next two samples from scratch1 buffer */
- x2 = *__SIMD32(pScr1)++;
-
- tapCnt = (srcBLen) >> 2u;
-
- while(tapCnt > 0u)
- {
-
- /* Read four samples from smaller buffer */
- y1 = _SIMD32_OFFSET(pIn2);
- y2 = _SIMD32_OFFSET(pIn2 + 2u);
-
- /* multiply and accumlate */
- acc0 = __SMLALD(x1, y1, acc0);
- acc2 = __SMLALD(x2, y1, acc2);
-
- /* pack input data */
- #ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x2, x1, 0);
- #else
- x3 = __PKHBT(x1, x2, 0);
- #endif
-
- /* multiply and accumlate */
- acc1 = __SMLALDX(x3, y1, acc1);
-
- /* Read next two samples from scratch1 buffer */
- x1 = _SIMD32_OFFSET(pScr1);
-
- /* multiply and accumlate */
- acc0 = __SMLALD(x2, y2, acc0);
- acc2 = __SMLALD(x1, y2, acc2);
-
- /* pack input data */
- #ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x1, x2, 0);
- #else
- x3 = __PKHBT(x2, x1, 0);
- #endif
-
- acc3 = __SMLALDX(x3, y1, acc3);
- acc1 = __SMLALDX(x3, y2, acc1);
-
- x2 = _SIMD32_OFFSET(pScr1 + 2u);
-
- #ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x2, x1, 0);
- #else
- x3 = __PKHBT(x1, x2, 0);
- #endif
-
- acc3 = __SMLALDX(x3, y2, acc3);
-
- /* update scratch pointers */
- pIn2 += 4u;
- pScr1 += 4u;
-
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- /* Update scratch pointer for remaining samples of smaller length sequence */
- pScr1 -= 4u;
-
- /* apply same above for remaining samples of smaller length sequence */
- tapCnt = (srcBLen) & 3u;
-
- while(tapCnt > 0u)
- {
- /* accumlate the results */
- acc0 += (*pScr1++ * *pIn2);
- acc1 += (*pScr1++ * *pIn2);
- acc2 += (*pScr1++ * *pIn2);
- acc3 += (*pScr1++ * *pIn2++);
-
- pScr1 -= 3u;
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- blkCnt--;
-
-
- /* Store the results in the accumulators in the destination buffer. */
-
- #ifndef ARM_MATH_BIG_ENDIAN
-
- *__SIMD32(pOut)++ =
- __PKHBT(__SSAT((acc0 >> 15), 16), __SSAT((acc1 >> 15), 16), 16);
- *__SIMD32(pOut)++ =
- __PKHBT(__SSAT((acc2 >> 15), 16), __SSAT((acc3 >> 15), 16), 16);
-
- #else
-
- *__SIMD32(pOut)++ =
- __PKHBT(__SSAT((acc1 >> 15), 16), __SSAT((acc0 >> 15), 16), 16);
- *__SIMD32(pOut)++ =
- __PKHBT(__SSAT((acc3 >> 15), 16), __SSAT((acc2 >> 15), 16), 16);
-
- #endif /* #ifndef ARM_MATH_BIG_ENDIAN */
-
- /* Initialization of inputB pointer */
- pIn2 = py;
-
- pScratch1 += 4u;
-
- }
-
-
- blkCnt = numPoints & 0x3;
-
- /* Calculate convolution for remaining samples of Bigger length sequence */
- while(blkCnt > 0)
- {
- /* Initialze temporary scratch pointer as scratch1 */
- pScr1 = pScratch1;
-
- /* Clear Accumlators */
- acc0 = 0;
-
- tapCnt = (srcBLen) >> 1u;
-
- while(tapCnt > 0u)
- {
-
- /* Read next two samples from scratch1 buffer */
- x1 = *__SIMD32(pScr1)++;
-
- /* Read two samples from smaller buffer */
- y1 = *__SIMD32(pIn2)++;
-
- acc0 = __SMLALD(x1, y1, acc0);
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- tapCnt = (srcBLen) & 1u;
-
- /* apply same above for remaining samples of smaller length sequence */
- while(tapCnt > 0u)
- {
-
- /* accumlate the results */
- acc0 += (*pScr1++ * *pIn2++);
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- blkCnt--;
-
- /* Store the result in the accumulator in the destination buffer. */
- *pOut++ = (q15_t) (__SSAT((acc0 >> 15), 16));
-
- /* Initialization of inputB pointer */
- pIn2 = py;
-
- pScratch1 += 1u;
-
- }
-
- /* set status as ARM_MATH_SUCCESS */
- status = ARM_MATH_SUCCESS;
-
- }
-
- /* Return to application */
- return (status);
- }
-
- #else
-
- arm_status arm_conv_partial_opt_q15(
- q15_t * pSrcA,
- uint32_t srcALen,
- q15_t * pSrcB,
- uint32_t srcBLen,
- q15_t * pDst,
- uint32_t firstIndex,
- uint32_t numPoints,
- q15_t * pScratch1,
- q15_t * pScratch2)
- {
-
- q15_t *pOut = pDst; /* output pointer */
- q15_t *pScr1 = pScratch1; /* Temporary pointer for scratch1 */
- q15_t *pScr2 = pScratch2; /* Temporary pointer for scratch1 */
- q63_t acc0, acc1, acc2, acc3; /* Accumulator */
- q15_t *pIn1; /* inputA pointer */
- q15_t *pIn2; /* inputB pointer */
- q15_t *px; /* Intermediate inputA pointer */
- q15_t *py; /* Intermediate inputB pointer */
- uint32_t j, k, blkCnt; /* loop counter */
- arm_status status; /* Status variable */
- uint32_t tapCnt; /* loop count */
- q15_t x10, x11, x20, x21; /* Temporary variables to hold srcA buffer */
- q15_t y10, y11; /* Temporary variables to hold srcB buffer */
-
-
- /* Check for range of output samples to be calculated */
- if((firstIndex + numPoints) > ((srcALen + (srcBLen - 1u))))
- {
- /* Set status as ARM_MATH_ARGUMENT_ERROR */
- status = ARM_MATH_ARGUMENT_ERROR;
- }
- else
- {
-
- /* The algorithm implementation is based on the lengths of the inputs. */
- /* srcB is always made to slide across srcA. */
- /* So srcBLen is always considered as shorter or equal to srcALen */
- if(srcALen >= srcBLen)
- {
- /* Initialization of inputA pointer */
- pIn1 = pSrcA;
-
- /* Initialization of inputB pointer */
- pIn2 = pSrcB;
- }
- else
- {
- /* Initialization of inputA pointer */
- pIn1 = pSrcB;
-
- /* Initialization of inputB pointer */
- pIn2 = pSrcA;
-
- /* srcBLen is always considered as shorter or equal to srcALen */
- j = srcBLen;
- srcBLen = srcALen;
- srcALen = j;
- }
-
- /* Temporary pointer for scratch2 */
- py = pScratch2;
-
- /* pointer to take end of scratch2 buffer */
- pScr2 = pScratch2 + srcBLen - 1;
-
- /* points to smaller length sequence */
- px = pIn2;
-
- /* Apply loop unrolling and do 4 Copies simultaneously. */
- k = srcBLen >> 2u;
-
- /* First part of the processing with loop unrolling copies 4 data points at a time.
- ** a second loop below copies for the remaining 1 to 3 samples. */
- while(k > 0u)
- {
- /* copy second buffer in reversal manner */
- *pScr2-- = *px++;
- *pScr2-- = *px++;
- *pScr2-- = *px++;
- *pScr2-- = *px++;
-
- /* Decrement the loop counter */
- k--;
- }
-
- /* If the count is not a multiple of 4, copy remaining samples here.
- ** No loop unrolling is used. */
- k = srcBLen % 0x4u;
-
- while(k > 0u)
- {
- /* copy second buffer in reversal manner for remaining samples */
- *pScr2-- = *px++;
-
- /* Decrement the loop counter */
- k--;
- }
-
- /* Initialze temporary scratch pointer */
- pScr1 = pScratch1;
-
- /* Fill (srcBLen - 1u) zeros in scratch buffer */
- arm_fill_q15(0, pScr1, (srcBLen - 1u));
-
- /* Update temporary scratch pointer */
- pScr1 += (srcBLen - 1u);
-
- /* Copy bigger length sequence(srcALen) samples in scratch1 buffer */
-
-
- /* Apply loop unrolling and do 4 Copies simultaneously. */
- k = srcALen >> 2u;
-
- /* First part of the processing with loop unrolling copies 4 data points at a time.
- ** a second loop below copies for the remaining 1 to 3 samples. */
- while(k > 0u)
- {
- /* copy second buffer in reversal manner */
- *pScr1++ = *pIn1++;
- *pScr1++ = *pIn1++;
- *pScr1++ = *pIn1++;
- *pScr1++ = *pIn1++;
-
- /* Decrement the loop counter */
- k--;
- }
-
- /* If the count is not a multiple of 4, copy remaining samples here.
- ** No loop unrolling is used. */
- k = srcALen % 0x4u;
-
- while(k > 0u)
- {
- /* copy second buffer in reversal manner for remaining samples */
- *pScr1++ = *pIn1++;
-
- /* Decrement the loop counter */
- k--;
- }
-
-
- /* Apply loop unrolling and do 4 Copies simultaneously. */
- k = (srcBLen - 1u) >> 2u;
-
- /* First part of the processing with loop unrolling copies 4 data points at a time.
- ** a second loop below copies for the remaining 1 to 3 samples. */
- while(k > 0u)
- {
- /* copy second buffer in reversal manner */
- *pScr1++ = 0;
- *pScr1++ = 0;
- *pScr1++ = 0;
- *pScr1++ = 0;
-
- /* Decrement the loop counter */
- k--;
- }
-
- /* If the count is not a multiple of 4, copy remaining samples here.
- ** No loop unrolling is used. */
- k = (srcBLen - 1u) % 0x4u;
-
- while(k > 0u)
- {
- /* copy second buffer in reversal manner for remaining samples */
- *pScr1++ = 0;
-
- /* Decrement the loop counter */
- k--;
- }
-
-
- /* Initialization of pIn2 pointer */
- pIn2 = py;
-
- pScratch1 += firstIndex;
-
- pOut = pDst + firstIndex;
-
- /* Actual convolution process starts here */
- blkCnt = (numPoints) >> 2;
-
- while(blkCnt > 0)
- {
- /* Initialze temporary scratch pointer as scratch1 */
- pScr1 = pScratch1;
-
- /* Clear Accumlators */
- acc0 = 0;
- acc1 = 0;
- acc2 = 0;
- acc3 = 0;
-
- /* Read two samples from scratch1 buffer */
- x10 = *pScr1++;
- x11 = *pScr1++;
-
- /* Read next two samples from scratch1 buffer */
- x20 = *pScr1++;
- x21 = *pScr1++;
-
- tapCnt = (srcBLen) >> 2u;
-
- while(tapCnt > 0u)
- {
-
- /* Read two samples from smaller buffer */
- y10 = *pIn2;
- y11 = *(pIn2 + 1u);
-
- /* multiply and accumlate */
- acc0 += (q63_t) x10 *y10;
- acc0 += (q63_t) x11 *y11;
- acc2 += (q63_t) x20 *y10;
- acc2 += (q63_t) x21 *y11;
-
- /* multiply and accumlate */
- acc1 += (q63_t) x11 *y10;
- acc1 += (q63_t) x20 *y11;
-
- /* Read next two samples from scratch1 buffer */
- x10 = *pScr1;
- x11 = *(pScr1 + 1u);
-
- /* multiply and accumlate */
- acc3 += (q63_t) x21 *y10;
- acc3 += (q63_t) x10 *y11;
-
- /* Read next two samples from scratch2 buffer */
- y10 = *(pIn2 + 2u);
- y11 = *(pIn2 + 3u);
-
- /* multiply and accumlate */
- acc0 += (q63_t) x20 *y10;
- acc0 += (q63_t) x21 *y11;
- acc2 += (q63_t) x10 *y10;
- acc2 += (q63_t) x11 *y11;
- acc1 += (q63_t) x21 *y10;
- acc1 += (q63_t) x10 *y11;
-
- /* Read next two samples from scratch1 buffer */
- x20 = *(pScr1 + 2);
- x21 = *(pScr1 + 3);
-
- /* multiply and accumlate */
- acc3 += (q63_t) x11 *y10;
- acc3 += (q63_t) x20 *y11;
-
- /* update scratch pointers */
- pIn2 += 4u;
- pScr1 += 4u;
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- /* Update scratch pointer for remaining samples of smaller length sequence */
- pScr1 -= 4u;
-
- /* apply same above for remaining samples of smaller length sequence */
- tapCnt = (srcBLen) & 3u;
-
- while(tapCnt > 0u)
- {
- /* accumlate the results */
- acc0 += (*pScr1++ * *pIn2);
- acc1 += (*pScr1++ * *pIn2);
- acc2 += (*pScr1++ * *pIn2);
- acc3 += (*pScr1++ * *pIn2++);
-
- pScr1 -= 3u;
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- blkCnt--;
-
-
- /* Store the results in the accumulators in the destination buffer. */
- *pOut++ = __SSAT((acc0 >> 15), 16);
- *pOut++ = __SSAT((acc1 >> 15), 16);
- *pOut++ = __SSAT((acc2 >> 15), 16);
- *pOut++ = __SSAT((acc3 >> 15), 16);
-
-
- /* Initialization of inputB pointer */
- pIn2 = py;
-
- pScratch1 += 4u;
-
- }
-
-
- blkCnt = numPoints & 0x3;
-
- /* Calculate convolution for remaining samples of Bigger length sequence */
- while(blkCnt > 0)
- {
- /* Initialze temporary scratch pointer as scratch1 */
- pScr1 = pScratch1;
-
- /* Clear Accumlators */
- acc0 = 0;
-
- tapCnt = (srcBLen) >> 1u;
-
- while(tapCnt > 0u)
- {
-
- /* Read next two samples from scratch1 buffer */
- x10 = *pScr1++;
- x11 = *pScr1++;
-
- /* Read two samples from smaller buffer */
- y10 = *pIn2++;
- y11 = *pIn2++;
-
- /* multiply and accumlate */
- acc0 += (q63_t) x10 *y10;
- acc0 += (q63_t) x11 *y11;
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- tapCnt = (srcBLen) & 1u;
-
- /* apply same above for remaining samples of smaller length sequence */
- while(tapCnt > 0u)
- {
-
- /* accumlate the results */
- acc0 += (*pScr1++ * *pIn2++);
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- blkCnt--;
-
- /* Store the result in the accumulator in the destination buffer. */
- *pOut++ = (q15_t) (__SSAT((acc0 >> 15), 16));
-
-
- /* Initialization of inputB pointer */
- pIn2 = py;
-
- pScratch1 += 1u;
-
- }
-
- /* set status as ARM_MATH_SUCCESS */
- status = ARM_MATH_SUCCESS;
-
- }
-
- /* Return to application */
- return (status);
- }
-
- #endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
-
-
- /**
- * @} end of PartialConv group
- */
|