From 6ab94e0b318884bbcb95e2ea3835f951502e1d99 Mon Sep 17 00:00:00 2001 From: jaseg Date: Wed, 14 Oct 2020 12:47:28 +0200 Subject: Move firmware into subdirectory --- .../Source/FilteringFunctions/arm_conv_opt_q7.c | 423 +++++++++++++++++++++ 1 file changed, 423 insertions(+) create mode 100644 fw/cdc-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_conv_opt_q7.c (limited to 'fw/cdc-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_conv_opt_q7.c') diff --git a/fw/cdc-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_conv_opt_q7.c b/fw/cdc-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_conv_opt_q7.c new file mode 100644 index 0000000..1dc2e49 --- /dev/null +++ b/fw/cdc-dials/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_conv_opt_q7.c @@ -0,0 +1,423 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_conv_opt_q7.c + * Description: Convolution of Q7 sequences + * + * $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 Conv + * @{ + */ + +/** + * @brief Convolution of Q7 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. Length srcALen+srcBLen-1. + * @param[in] *pScratch1 points to scratch buffer(of type q15_t) of size max(srcALen, srcBLen) + 2*min(srcALen, srcBLen) - 2. + * @param[in] *pScratch2 points to scratch buffer (of type q15_t) of size min(srcALen, srcBLen). + * @return none. + * + * \par Restrictions + * If the silicon does not support unaligned memory access enable the macro UNALIGNED_SUPPORT_DISABLE + * In this case input, output, scratch1 and scratch2 buffers should be aligned by 32-bit + * + * @details + * Scaling and Overflow Behavior: + * + * \par + * The function is implemented using a 32-bit internal accumulator. + * Both the inputs 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. + * This approach provides 17 guard bits and there is no risk of overflow as long as max(srcALen, srcBLen)<131072. + * The 18.14 result is then truncated to 18.7 format by discarding the low 7 bits and then saturated to 1.7 format. + * + */ + +void arm_conv_opt_q7( + q7_t * pSrcA, + uint32_t srcALen, + q7_t * pSrcB, + uint32_t srcBLen, + q7_t * pDst, + q15_t * pScratch1, + q15_t * pScratch2) +{ + + q15_t *pScr2, *pScr1; /* Intermediate pointers for scratch pointers */ + q15_t x4; /* Temporary input variable */ + q7_t *pIn1, *pIn2; /* inputA and inputB pointer */ + uint32_t j, k, blkCnt, tapCnt; /* loop counter */ + q7_t *px; /* Temporary input1 pointer */ + q15_t *py; /* Temporary input2 pointer */ + q31_t acc0, acc1, acc2, acc3; /* Accumulator */ + q31_t x1, x2, x3, y1; /* Temporary input variables */ + q7_t *pOut = pDst; /* output pointer */ + q7_t out0, out1, out2, out3; /* temporary variables */ + + /* 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; + } + + /* pointer to take end of scratch2 buffer */ + pScr2 = pScratch2; + + /* points to smaller length sequence */ + px = pIn2 + srcBLen - 1; + + /* 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 */ + x4 = (q15_t) * px--; + *pScr2++ = x4; + x4 = (q15_t) * px--; + *pScr2++ = x4; + x4 = (q15_t) * px--; + *pScr2++ = x4; + x4 = (q15_t) * px--; + *pScr2++ = x4; + + /* 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 */ + x4 = (q15_t) * px--; + *pScr2++ = x4; + + /* 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 (srcALen) samples in scratch 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 */ + x4 = (q15_t) * pIn1++; + *pScr1++ = x4; + x4 = (q15_t) * pIn1++; + *pScr1++ = x4; + x4 = (q15_t) * pIn1++; + *pScr1++ = x4; + x4 = (q15_t) * pIn1++; + *pScr1++ = x4; + + /* 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 */ + x4 = (q15_t) * pIn1++; + *pScr1++ = x4; + + /* Decrement the loop counter */ + k--; + } + +#ifndef UNALIGNED_SUPPORT_DISABLE + + /* Fill (srcBLen - 1U) zeros at end of scratch buffer */ + arm_fill_q15(0, pScr1, (srcBLen - 1U)); + + /* Update pointer */ + pScr1 += (srcBLen - 1U); + +#else + + /* 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--; + } + +#endif + + /* Temporary pointer for scratch2 */ + py = pScratch2; + + /* Initialization of pIn2 pointer */ + pIn2 = (q7_t *) py; + + pScr2 = py; + + /* Actual convolution process starts here */ + blkCnt = (srcALen + srcBLen - 1U) >> 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(pScr2); + + /* multiply and accumlate */ + acc0 = __SMLAD(x1, y1, acc0); + acc2 = __SMLAD(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 = __SMLADX(x3, y1, acc1); + + /* Read next two samples from scratch1 buffer */ + x1 = *__SIMD32(pScr1)++; + + /* pack input data */ +#ifndef ARM_MATH_BIG_ENDIAN + x3 = __PKHBT(x1, x2, 0); +#else + x3 = __PKHBT(x2, x1, 0); +#endif + + acc3 = __SMLADX(x3, y1, acc3); + + /* Read four samples from smaller buffer */ + y1 = _SIMD32_OFFSET(pScr2 + 2U); + + acc0 = __SMLAD(x2, y1, acc0); + + acc2 = __SMLAD(x1, y1, acc2); + + acc1 = __SMLADX(x3, y1, acc1); + + x2 = *__SIMD32(pScr1)++; + +#ifndef ARM_MATH_BIG_ENDIAN + x3 = __PKHBT(x2, x1, 0); +#else + x3 = __PKHBT(x1, x2, 0); +#endif + + acc3 = __SMLADX(x3, y1, acc3); + + pScr2 += 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++ * *pScr2); + acc1 += (*pScr1++ * *pScr2); + acc2 += (*pScr1++ * *pScr2); + acc3 += (*pScr1++ * *pScr2++); + + pScr1 -= 3U; + + /* Decrement the loop counter */ + tapCnt--; + } + + blkCnt--; + + /* Store the result in the accumulator in the destination buffer. */ + out0 = (q7_t) (__SSAT(acc0 >> 7U, 8)); + out1 = (q7_t) (__SSAT(acc1 >> 7U, 8)); + out2 = (q7_t) (__SSAT(acc2 >> 7U, 8)); + out3 = (q7_t) (__SSAT(acc3 >> 7U, 8)); + + *__SIMD32(pOut)++ = __PACKq7(out0, out1, out2, out3); + + /* Initialization of inputB pointer */ + pScr2 = py; + + pScratch1 += 4U; + + } + + + blkCnt = (srcALen + srcBLen - 1U) & 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) + { + acc0 += (*pScr1++ * *pScr2++); + acc0 += (*pScr1++ * *pScr2++); + + /* 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++ * *pScr2++); + + /* Decrement the loop counter */ + tapCnt--; + } + + blkCnt--; + + /* Store the result in the accumulator in the destination buffer. */ + *pOut++ = (q7_t) (__SSAT(acc0 >> 7U, 8)); + + /* Initialization of inputB pointer */ + pScr2 = py; + + pScratch1 += 1U; + + } + +} + + +/** + * @} end of Conv group + */ -- cgit