The CMSIS DSP 5 library
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functions/FilteringFunctions/arm_conv_opt_q7.c@3:4098b9d3d571, 2018-06-21 (annotated)
- Committer:
- xorjoep
- Date:
- Thu Jun 21 11:56:27 2018 +0000
- Revision:
- 3:4098b9d3d571
- Parent:
- 1:24714b45cd1b
headers is a folder not a library
Who changed what in which revision?
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xorjoep | 1:24714b45cd1b | 1 | /* ---------------------------------------------------------------------- |
xorjoep | 1:24714b45cd1b | 2 | * Project: CMSIS DSP Library |
xorjoep | 1:24714b45cd1b | 3 | * Title: arm_conv_opt_q7.c |
xorjoep | 1:24714b45cd1b | 4 | * Description: Convolution of Q7 sequences |
xorjoep | 1:24714b45cd1b | 5 | * |
xorjoep | 1:24714b45cd1b | 6 | * $Date: 27. January 2017 |
xorjoep | 1:24714b45cd1b | 7 | * $Revision: V.1.5.1 |
xorjoep | 1:24714b45cd1b | 8 | * |
xorjoep | 1:24714b45cd1b | 9 | * Target Processor: Cortex-M cores |
xorjoep | 1:24714b45cd1b | 10 | * -------------------------------------------------------------------- */ |
xorjoep | 1:24714b45cd1b | 11 | /* |
xorjoep | 1:24714b45cd1b | 12 | * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. |
xorjoep | 1:24714b45cd1b | 13 | * |
xorjoep | 1:24714b45cd1b | 14 | * SPDX-License-Identifier: Apache-2.0 |
xorjoep | 1:24714b45cd1b | 15 | * |
xorjoep | 1:24714b45cd1b | 16 | * Licensed under the Apache License, Version 2.0 (the License); you may |
xorjoep | 1:24714b45cd1b | 17 | * not use this file except in compliance with the License. |
xorjoep | 1:24714b45cd1b | 18 | * You may obtain a copy of the License at |
xorjoep | 1:24714b45cd1b | 19 | * |
xorjoep | 1:24714b45cd1b | 20 | * www.apache.org/licenses/LICENSE-2.0 |
xorjoep | 1:24714b45cd1b | 21 | * |
xorjoep | 1:24714b45cd1b | 22 | * Unless required by applicable law or agreed to in writing, software |
xorjoep | 1:24714b45cd1b | 23 | * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
xorjoep | 1:24714b45cd1b | 24 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
xorjoep | 1:24714b45cd1b | 25 | * See the License for the specific language governing permissions and |
xorjoep | 1:24714b45cd1b | 26 | * limitations under the License. |
xorjoep | 1:24714b45cd1b | 27 | */ |
xorjoep | 1:24714b45cd1b | 28 | |
xorjoep | 1:24714b45cd1b | 29 | #include "arm_math.h" |
xorjoep | 1:24714b45cd1b | 30 | |
xorjoep | 1:24714b45cd1b | 31 | /** |
xorjoep | 1:24714b45cd1b | 32 | * @ingroup groupFilters |
xorjoep | 1:24714b45cd1b | 33 | */ |
xorjoep | 1:24714b45cd1b | 34 | |
xorjoep | 1:24714b45cd1b | 35 | /** |
xorjoep | 1:24714b45cd1b | 36 | * @addtogroup Conv |
xorjoep | 1:24714b45cd1b | 37 | * @{ |
xorjoep | 1:24714b45cd1b | 38 | */ |
xorjoep | 1:24714b45cd1b | 39 | |
xorjoep | 1:24714b45cd1b | 40 | /** |
xorjoep | 1:24714b45cd1b | 41 | * @brief Convolution of Q7 sequences. |
xorjoep | 1:24714b45cd1b | 42 | * @param[in] *pSrcA points to the first input sequence. |
xorjoep | 1:24714b45cd1b | 43 | * @param[in] srcALen length of the first input sequence. |
xorjoep | 1:24714b45cd1b | 44 | * @param[in] *pSrcB points to the second input sequence. |
xorjoep | 1:24714b45cd1b | 45 | * @param[in] srcBLen length of the second input sequence. |
xorjoep | 1:24714b45cd1b | 46 | * @param[out] *pDst points to the location where the output result is written. Length srcALen+srcBLen-1. |
xorjoep | 1:24714b45cd1b | 47 | * @param[in] *pScratch1 points to scratch buffer(of type q15_t) of size max(srcALen, srcBLen) + 2*min(srcALen, srcBLen) - 2. |
xorjoep | 1:24714b45cd1b | 48 | * @param[in] *pScratch2 points to scratch buffer (of type q15_t) of size min(srcALen, srcBLen). |
xorjoep | 1:24714b45cd1b | 49 | * @return none. |
xorjoep | 1:24714b45cd1b | 50 | * |
xorjoep | 1:24714b45cd1b | 51 | * \par Restrictions |
xorjoep | 1:24714b45cd1b | 52 | * If the silicon does not support unaligned memory access enable the macro UNALIGNED_SUPPORT_DISABLE |
xorjoep | 1:24714b45cd1b | 53 | * In this case input, output, scratch1 and scratch2 buffers should be aligned by 32-bit |
xorjoep | 1:24714b45cd1b | 54 | * |
xorjoep | 1:24714b45cd1b | 55 | * @details |
xorjoep | 1:24714b45cd1b | 56 | * <b>Scaling and Overflow Behavior:</b> |
xorjoep | 1:24714b45cd1b | 57 | * |
xorjoep | 1:24714b45cd1b | 58 | * \par |
xorjoep | 1:24714b45cd1b | 59 | * The function is implemented using a 32-bit internal accumulator. |
xorjoep | 1:24714b45cd1b | 60 | * Both the inputs are represented in 1.7 format and multiplications yield a 2.14 result. |
xorjoep | 1:24714b45cd1b | 61 | * The 2.14 intermediate results are accumulated in a 32-bit accumulator in 18.14 format. |
xorjoep | 1:24714b45cd1b | 62 | * This approach provides 17 guard bits and there is no risk of overflow as long as <code>max(srcALen, srcBLen)<131072</code>. |
xorjoep | 1:24714b45cd1b | 63 | * The 18.14 result is then truncated to 18.7 format by discarding the low 7 bits and then saturated to 1.7 format. |
xorjoep | 1:24714b45cd1b | 64 | * |
xorjoep | 1:24714b45cd1b | 65 | */ |
xorjoep | 1:24714b45cd1b | 66 | |
xorjoep | 1:24714b45cd1b | 67 | void arm_conv_opt_q7( |
xorjoep | 1:24714b45cd1b | 68 | q7_t * pSrcA, |
xorjoep | 1:24714b45cd1b | 69 | uint32_t srcALen, |
xorjoep | 1:24714b45cd1b | 70 | q7_t * pSrcB, |
xorjoep | 1:24714b45cd1b | 71 | uint32_t srcBLen, |
xorjoep | 1:24714b45cd1b | 72 | q7_t * pDst, |
xorjoep | 1:24714b45cd1b | 73 | q15_t * pScratch1, |
xorjoep | 1:24714b45cd1b | 74 | q15_t * pScratch2) |
xorjoep | 1:24714b45cd1b | 75 | { |
xorjoep | 1:24714b45cd1b | 76 | |
xorjoep | 1:24714b45cd1b | 77 | q15_t *pScr2, *pScr1; /* Intermediate pointers for scratch pointers */ |
xorjoep | 1:24714b45cd1b | 78 | q15_t x4; /* Temporary input variable */ |
xorjoep | 1:24714b45cd1b | 79 | q7_t *pIn1, *pIn2; /* inputA and inputB pointer */ |
xorjoep | 1:24714b45cd1b | 80 | uint32_t j, k, blkCnt, tapCnt; /* loop counter */ |
xorjoep | 1:24714b45cd1b | 81 | q7_t *px; /* Temporary input1 pointer */ |
xorjoep | 1:24714b45cd1b | 82 | q15_t *py; /* Temporary input2 pointer */ |
xorjoep | 1:24714b45cd1b | 83 | q31_t acc0, acc1, acc2, acc3; /* Accumulator */ |
xorjoep | 1:24714b45cd1b | 84 | q31_t x1, x2, x3, y1; /* Temporary input variables */ |
xorjoep | 1:24714b45cd1b | 85 | q7_t *pOut = pDst; /* output pointer */ |
xorjoep | 1:24714b45cd1b | 86 | q7_t out0, out1, out2, out3; /* temporary variables */ |
xorjoep | 1:24714b45cd1b | 87 | |
xorjoep | 1:24714b45cd1b | 88 | /* The algorithm implementation is based on the lengths of the inputs. */ |
xorjoep | 1:24714b45cd1b | 89 | /* srcB is always made to slide across srcA. */ |
xorjoep | 1:24714b45cd1b | 90 | /* So srcBLen is always considered as shorter or equal to srcALen */ |
xorjoep | 1:24714b45cd1b | 91 | if (srcALen >= srcBLen) |
xorjoep | 1:24714b45cd1b | 92 | { |
xorjoep | 1:24714b45cd1b | 93 | /* Initialization of inputA pointer */ |
xorjoep | 1:24714b45cd1b | 94 | pIn1 = pSrcA; |
xorjoep | 1:24714b45cd1b | 95 | |
xorjoep | 1:24714b45cd1b | 96 | /* Initialization of inputB pointer */ |
xorjoep | 1:24714b45cd1b | 97 | pIn2 = pSrcB; |
xorjoep | 1:24714b45cd1b | 98 | } |
xorjoep | 1:24714b45cd1b | 99 | else |
xorjoep | 1:24714b45cd1b | 100 | { |
xorjoep | 1:24714b45cd1b | 101 | /* Initialization of inputA pointer */ |
xorjoep | 1:24714b45cd1b | 102 | pIn1 = pSrcB; |
xorjoep | 1:24714b45cd1b | 103 | |
xorjoep | 1:24714b45cd1b | 104 | /* Initialization of inputB pointer */ |
xorjoep | 1:24714b45cd1b | 105 | pIn2 = pSrcA; |
xorjoep | 1:24714b45cd1b | 106 | |
xorjoep | 1:24714b45cd1b | 107 | /* srcBLen is always considered as shorter or equal to srcALen */ |
xorjoep | 1:24714b45cd1b | 108 | j = srcBLen; |
xorjoep | 1:24714b45cd1b | 109 | srcBLen = srcALen; |
xorjoep | 1:24714b45cd1b | 110 | srcALen = j; |
xorjoep | 1:24714b45cd1b | 111 | } |
xorjoep | 1:24714b45cd1b | 112 | |
xorjoep | 1:24714b45cd1b | 113 | /* pointer to take end of scratch2 buffer */ |
xorjoep | 1:24714b45cd1b | 114 | pScr2 = pScratch2; |
xorjoep | 1:24714b45cd1b | 115 | |
xorjoep | 1:24714b45cd1b | 116 | /* points to smaller length sequence */ |
xorjoep | 1:24714b45cd1b | 117 | px = pIn2 + srcBLen - 1; |
xorjoep | 1:24714b45cd1b | 118 | |
xorjoep | 1:24714b45cd1b | 119 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
xorjoep | 1:24714b45cd1b | 120 | k = srcBLen >> 2U; |
xorjoep | 1:24714b45cd1b | 121 | |
xorjoep | 1:24714b45cd1b | 122 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
xorjoep | 1:24714b45cd1b | 123 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
xorjoep | 1:24714b45cd1b | 124 | while (k > 0U) |
xorjoep | 1:24714b45cd1b | 125 | { |
xorjoep | 1:24714b45cd1b | 126 | /* copy second buffer in reversal manner */ |
xorjoep | 1:24714b45cd1b | 127 | x4 = (q15_t) * px--; |
xorjoep | 1:24714b45cd1b | 128 | *pScr2++ = x4; |
xorjoep | 1:24714b45cd1b | 129 | x4 = (q15_t) * px--; |
xorjoep | 1:24714b45cd1b | 130 | *pScr2++ = x4; |
xorjoep | 1:24714b45cd1b | 131 | x4 = (q15_t) * px--; |
xorjoep | 1:24714b45cd1b | 132 | *pScr2++ = x4; |
xorjoep | 1:24714b45cd1b | 133 | x4 = (q15_t) * px--; |
xorjoep | 1:24714b45cd1b | 134 | *pScr2++ = x4; |
xorjoep | 1:24714b45cd1b | 135 | |
xorjoep | 1:24714b45cd1b | 136 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 137 | k--; |
xorjoep | 1:24714b45cd1b | 138 | } |
xorjoep | 1:24714b45cd1b | 139 | |
xorjoep | 1:24714b45cd1b | 140 | /* If the count is not a multiple of 4, copy remaining samples here. |
xorjoep | 1:24714b45cd1b | 141 | ** No loop unrolling is used. */ |
xorjoep | 1:24714b45cd1b | 142 | k = srcBLen % 0x4U; |
xorjoep | 1:24714b45cd1b | 143 | |
xorjoep | 1:24714b45cd1b | 144 | while (k > 0U) |
xorjoep | 1:24714b45cd1b | 145 | { |
xorjoep | 1:24714b45cd1b | 146 | /* copy second buffer in reversal manner for remaining samples */ |
xorjoep | 1:24714b45cd1b | 147 | x4 = (q15_t) * px--; |
xorjoep | 1:24714b45cd1b | 148 | *pScr2++ = x4; |
xorjoep | 1:24714b45cd1b | 149 | |
xorjoep | 1:24714b45cd1b | 150 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 151 | k--; |
xorjoep | 1:24714b45cd1b | 152 | } |
xorjoep | 1:24714b45cd1b | 153 | |
xorjoep | 1:24714b45cd1b | 154 | /* Initialze temporary scratch pointer */ |
xorjoep | 1:24714b45cd1b | 155 | pScr1 = pScratch1; |
xorjoep | 1:24714b45cd1b | 156 | |
xorjoep | 1:24714b45cd1b | 157 | /* Fill (srcBLen - 1U) zeros in scratch buffer */ |
xorjoep | 1:24714b45cd1b | 158 | arm_fill_q15(0, pScr1, (srcBLen - 1U)); |
xorjoep | 1:24714b45cd1b | 159 | |
xorjoep | 1:24714b45cd1b | 160 | /* Update temporary scratch pointer */ |
xorjoep | 1:24714b45cd1b | 161 | pScr1 += (srcBLen - 1U); |
xorjoep | 1:24714b45cd1b | 162 | |
xorjoep | 1:24714b45cd1b | 163 | /* Copy (srcALen) samples in scratch buffer */ |
xorjoep | 1:24714b45cd1b | 164 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
xorjoep | 1:24714b45cd1b | 165 | k = srcALen >> 2U; |
xorjoep | 1:24714b45cd1b | 166 | |
xorjoep | 1:24714b45cd1b | 167 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
xorjoep | 1:24714b45cd1b | 168 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
xorjoep | 1:24714b45cd1b | 169 | while (k > 0U) |
xorjoep | 1:24714b45cd1b | 170 | { |
xorjoep | 1:24714b45cd1b | 171 | /* copy second buffer in reversal manner */ |
xorjoep | 1:24714b45cd1b | 172 | x4 = (q15_t) * pIn1++; |
xorjoep | 1:24714b45cd1b | 173 | *pScr1++ = x4; |
xorjoep | 1:24714b45cd1b | 174 | x4 = (q15_t) * pIn1++; |
xorjoep | 1:24714b45cd1b | 175 | *pScr1++ = x4; |
xorjoep | 1:24714b45cd1b | 176 | x4 = (q15_t) * pIn1++; |
xorjoep | 1:24714b45cd1b | 177 | *pScr1++ = x4; |
xorjoep | 1:24714b45cd1b | 178 | x4 = (q15_t) * pIn1++; |
xorjoep | 1:24714b45cd1b | 179 | *pScr1++ = x4; |
xorjoep | 1:24714b45cd1b | 180 | |
xorjoep | 1:24714b45cd1b | 181 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 182 | k--; |
xorjoep | 1:24714b45cd1b | 183 | } |
xorjoep | 1:24714b45cd1b | 184 | |
xorjoep | 1:24714b45cd1b | 185 | /* If the count is not a multiple of 4, copy remaining samples here. |
xorjoep | 1:24714b45cd1b | 186 | ** No loop unrolling is used. */ |
xorjoep | 1:24714b45cd1b | 187 | k = srcALen % 0x4U; |
xorjoep | 1:24714b45cd1b | 188 | |
xorjoep | 1:24714b45cd1b | 189 | while (k > 0U) |
xorjoep | 1:24714b45cd1b | 190 | { |
xorjoep | 1:24714b45cd1b | 191 | /* copy second buffer in reversal manner for remaining samples */ |
xorjoep | 1:24714b45cd1b | 192 | x4 = (q15_t) * pIn1++; |
xorjoep | 1:24714b45cd1b | 193 | *pScr1++ = x4; |
xorjoep | 1:24714b45cd1b | 194 | |
xorjoep | 1:24714b45cd1b | 195 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 196 | k--; |
xorjoep | 1:24714b45cd1b | 197 | } |
xorjoep | 1:24714b45cd1b | 198 | |
xorjoep | 1:24714b45cd1b | 199 | #ifndef UNALIGNED_SUPPORT_DISABLE |
xorjoep | 1:24714b45cd1b | 200 | |
xorjoep | 1:24714b45cd1b | 201 | /* Fill (srcBLen - 1U) zeros at end of scratch buffer */ |
xorjoep | 1:24714b45cd1b | 202 | arm_fill_q15(0, pScr1, (srcBLen - 1U)); |
xorjoep | 1:24714b45cd1b | 203 | |
xorjoep | 1:24714b45cd1b | 204 | /* Update pointer */ |
xorjoep | 1:24714b45cd1b | 205 | pScr1 += (srcBLen - 1U); |
xorjoep | 1:24714b45cd1b | 206 | |
xorjoep | 1:24714b45cd1b | 207 | #else |
xorjoep | 1:24714b45cd1b | 208 | |
xorjoep | 1:24714b45cd1b | 209 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
xorjoep | 1:24714b45cd1b | 210 | k = (srcBLen - 1U) >> 2U; |
xorjoep | 1:24714b45cd1b | 211 | |
xorjoep | 1:24714b45cd1b | 212 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
xorjoep | 1:24714b45cd1b | 213 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
xorjoep | 1:24714b45cd1b | 214 | while (k > 0U) |
xorjoep | 1:24714b45cd1b | 215 | { |
xorjoep | 1:24714b45cd1b | 216 | /* copy second buffer in reversal manner */ |
xorjoep | 1:24714b45cd1b | 217 | *pScr1++ = 0; |
xorjoep | 1:24714b45cd1b | 218 | *pScr1++ = 0; |
xorjoep | 1:24714b45cd1b | 219 | *pScr1++ = 0; |
xorjoep | 1:24714b45cd1b | 220 | *pScr1++ = 0; |
xorjoep | 1:24714b45cd1b | 221 | |
xorjoep | 1:24714b45cd1b | 222 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 223 | k--; |
xorjoep | 1:24714b45cd1b | 224 | } |
xorjoep | 1:24714b45cd1b | 225 | |
xorjoep | 1:24714b45cd1b | 226 | /* If the count is not a multiple of 4, copy remaining samples here. |
xorjoep | 1:24714b45cd1b | 227 | ** No loop unrolling is used. */ |
xorjoep | 1:24714b45cd1b | 228 | k = (srcBLen - 1U) % 0x4U; |
xorjoep | 1:24714b45cd1b | 229 | |
xorjoep | 1:24714b45cd1b | 230 | while (k > 0U) |
xorjoep | 1:24714b45cd1b | 231 | { |
xorjoep | 1:24714b45cd1b | 232 | /* copy second buffer in reversal manner for remaining samples */ |
xorjoep | 1:24714b45cd1b | 233 | *pScr1++ = 0; |
xorjoep | 1:24714b45cd1b | 234 | |
xorjoep | 1:24714b45cd1b | 235 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 236 | k--; |
xorjoep | 1:24714b45cd1b | 237 | } |
xorjoep | 1:24714b45cd1b | 238 | |
xorjoep | 1:24714b45cd1b | 239 | #endif |
xorjoep | 1:24714b45cd1b | 240 | |
xorjoep | 1:24714b45cd1b | 241 | /* Temporary pointer for scratch2 */ |
xorjoep | 1:24714b45cd1b | 242 | py = pScratch2; |
xorjoep | 1:24714b45cd1b | 243 | |
xorjoep | 1:24714b45cd1b | 244 | /* Initialization of pIn2 pointer */ |
xorjoep | 1:24714b45cd1b | 245 | pIn2 = (q7_t *) py; |
xorjoep | 1:24714b45cd1b | 246 | |
xorjoep | 1:24714b45cd1b | 247 | pScr2 = py; |
xorjoep | 1:24714b45cd1b | 248 | |
xorjoep | 1:24714b45cd1b | 249 | /* Actual convolution process starts here */ |
xorjoep | 1:24714b45cd1b | 250 | blkCnt = (srcALen + srcBLen - 1U) >> 2; |
xorjoep | 1:24714b45cd1b | 251 | |
xorjoep | 1:24714b45cd1b | 252 | while (blkCnt > 0) |
xorjoep | 1:24714b45cd1b | 253 | { |
xorjoep | 1:24714b45cd1b | 254 | /* Initialze temporary scratch pointer as scratch1 */ |
xorjoep | 1:24714b45cd1b | 255 | pScr1 = pScratch1; |
xorjoep | 1:24714b45cd1b | 256 | |
xorjoep | 1:24714b45cd1b | 257 | /* Clear Accumlators */ |
xorjoep | 1:24714b45cd1b | 258 | acc0 = 0; |
xorjoep | 1:24714b45cd1b | 259 | acc1 = 0; |
xorjoep | 1:24714b45cd1b | 260 | acc2 = 0; |
xorjoep | 1:24714b45cd1b | 261 | acc3 = 0; |
xorjoep | 1:24714b45cd1b | 262 | |
xorjoep | 1:24714b45cd1b | 263 | /* Read two samples from scratch1 buffer */ |
xorjoep | 1:24714b45cd1b | 264 | x1 = *__SIMD32(pScr1)++; |
xorjoep | 1:24714b45cd1b | 265 | |
xorjoep | 1:24714b45cd1b | 266 | /* Read next two samples from scratch1 buffer */ |
xorjoep | 1:24714b45cd1b | 267 | x2 = *__SIMD32(pScr1)++; |
xorjoep | 1:24714b45cd1b | 268 | |
xorjoep | 1:24714b45cd1b | 269 | tapCnt = (srcBLen) >> 2U; |
xorjoep | 1:24714b45cd1b | 270 | |
xorjoep | 1:24714b45cd1b | 271 | while (tapCnt > 0U) |
xorjoep | 1:24714b45cd1b | 272 | { |
xorjoep | 1:24714b45cd1b | 273 | |
xorjoep | 1:24714b45cd1b | 274 | /* Read four samples from smaller buffer */ |
xorjoep | 1:24714b45cd1b | 275 | y1 = _SIMD32_OFFSET(pScr2); |
xorjoep | 1:24714b45cd1b | 276 | |
xorjoep | 1:24714b45cd1b | 277 | /* multiply and accumlate */ |
xorjoep | 1:24714b45cd1b | 278 | acc0 = __SMLAD(x1, y1, acc0); |
xorjoep | 1:24714b45cd1b | 279 | acc2 = __SMLAD(x2, y1, acc2); |
xorjoep | 1:24714b45cd1b | 280 | |
xorjoep | 1:24714b45cd1b | 281 | /* pack input data */ |
xorjoep | 1:24714b45cd1b | 282 | #ifndef ARM_MATH_BIG_ENDIAN |
xorjoep | 1:24714b45cd1b | 283 | x3 = __PKHBT(x2, x1, 0); |
xorjoep | 1:24714b45cd1b | 284 | #else |
xorjoep | 1:24714b45cd1b | 285 | x3 = __PKHBT(x1, x2, 0); |
xorjoep | 1:24714b45cd1b | 286 | #endif |
xorjoep | 1:24714b45cd1b | 287 | |
xorjoep | 1:24714b45cd1b | 288 | /* multiply and accumlate */ |
xorjoep | 1:24714b45cd1b | 289 | acc1 = __SMLADX(x3, y1, acc1); |
xorjoep | 1:24714b45cd1b | 290 | |
xorjoep | 1:24714b45cd1b | 291 | /* Read next two samples from scratch1 buffer */ |
xorjoep | 1:24714b45cd1b | 292 | x1 = *__SIMD32(pScr1)++; |
xorjoep | 1:24714b45cd1b | 293 | |
xorjoep | 1:24714b45cd1b | 294 | /* pack input data */ |
xorjoep | 1:24714b45cd1b | 295 | #ifndef ARM_MATH_BIG_ENDIAN |
xorjoep | 1:24714b45cd1b | 296 | x3 = __PKHBT(x1, x2, 0); |
xorjoep | 1:24714b45cd1b | 297 | #else |
xorjoep | 1:24714b45cd1b | 298 | x3 = __PKHBT(x2, x1, 0); |
xorjoep | 1:24714b45cd1b | 299 | #endif |
xorjoep | 1:24714b45cd1b | 300 | |
xorjoep | 1:24714b45cd1b | 301 | acc3 = __SMLADX(x3, y1, acc3); |
xorjoep | 1:24714b45cd1b | 302 | |
xorjoep | 1:24714b45cd1b | 303 | /* Read four samples from smaller buffer */ |
xorjoep | 1:24714b45cd1b | 304 | y1 = _SIMD32_OFFSET(pScr2 + 2U); |
xorjoep | 1:24714b45cd1b | 305 | |
xorjoep | 1:24714b45cd1b | 306 | acc0 = __SMLAD(x2, y1, acc0); |
xorjoep | 1:24714b45cd1b | 307 | |
xorjoep | 1:24714b45cd1b | 308 | acc2 = __SMLAD(x1, y1, acc2); |
xorjoep | 1:24714b45cd1b | 309 | |
xorjoep | 1:24714b45cd1b | 310 | acc1 = __SMLADX(x3, y1, acc1); |
xorjoep | 1:24714b45cd1b | 311 | |
xorjoep | 1:24714b45cd1b | 312 | x2 = *__SIMD32(pScr1)++; |
xorjoep | 1:24714b45cd1b | 313 | |
xorjoep | 1:24714b45cd1b | 314 | #ifndef ARM_MATH_BIG_ENDIAN |
xorjoep | 1:24714b45cd1b | 315 | x3 = __PKHBT(x2, x1, 0); |
xorjoep | 1:24714b45cd1b | 316 | #else |
xorjoep | 1:24714b45cd1b | 317 | x3 = __PKHBT(x1, x2, 0); |
xorjoep | 1:24714b45cd1b | 318 | #endif |
xorjoep | 1:24714b45cd1b | 319 | |
xorjoep | 1:24714b45cd1b | 320 | acc3 = __SMLADX(x3, y1, acc3); |
xorjoep | 1:24714b45cd1b | 321 | |
xorjoep | 1:24714b45cd1b | 322 | pScr2 += 4U; |
xorjoep | 1:24714b45cd1b | 323 | |
xorjoep | 1:24714b45cd1b | 324 | |
xorjoep | 1:24714b45cd1b | 325 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 326 | tapCnt--; |
xorjoep | 1:24714b45cd1b | 327 | } |
xorjoep | 1:24714b45cd1b | 328 | |
xorjoep | 1:24714b45cd1b | 329 | |
xorjoep | 1:24714b45cd1b | 330 | |
xorjoep | 1:24714b45cd1b | 331 | /* Update scratch pointer for remaining samples of smaller length sequence */ |
xorjoep | 1:24714b45cd1b | 332 | pScr1 -= 4U; |
xorjoep | 1:24714b45cd1b | 333 | |
xorjoep | 1:24714b45cd1b | 334 | |
xorjoep | 1:24714b45cd1b | 335 | /* apply same above for remaining samples of smaller length sequence */ |
xorjoep | 1:24714b45cd1b | 336 | tapCnt = (srcBLen) & 3U; |
xorjoep | 1:24714b45cd1b | 337 | |
xorjoep | 1:24714b45cd1b | 338 | while (tapCnt > 0U) |
xorjoep | 1:24714b45cd1b | 339 | { |
xorjoep | 1:24714b45cd1b | 340 | |
xorjoep | 1:24714b45cd1b | 341 | /* accumlate the results */ |
xorjoep | 1:24714b45cd1b | 342 | acc0 += (*pScr1++ * *pScr2); |
xorjoep | 1:24714b45cd1b | 343 | acc1 += (*pScr1++ * *pScr2); |
xorjoep | 1:24714b45cd1b | 344 | acc2 += (*pScr1++ * *pScr2); |
xorjoep | 1:24714b45cd1b | 345 | acc3 += (*pScr1++ * *pScr2++); |
xorjoep | 1:24714b45cd1b | 346 | |
xorjoep | 1:24714b45cd1b | 347 | pScr1 -= 3U; |
xorjoep | 1:24714b45cd1b | 348 | |
xorjoep | 1:24714b45cd1b | 349 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 350 | tapCnt--; |
xorjoep | 1:24714b45cd1b | 351 | } |
xorjoep | 1:24714b45cd1b | 352 | |
xorjoep | 1:24714b45cd1b | 353 | blkCnt--; |
xorjoep | 1:24714b45cd1b | 354 | |
xorjoep | 1:24714b45cd1b | 355 | /* Store the result in the accumulator in the destination buffer. */ |
xorjoep | 1:24714b45cd1b | 356 | out0 = (q7_t) (__SSAT(acc0 >> 7U, 8)); |
xorjoep | 1:24714b45cd1b | 357 | out1 = (q7_t) (__SSAT(acc1 >> 7U, 8)); |
xorjoep | 1:24714b45cd1b | 358 | out2 = (q7_t) (__SSAT(acc2 >> 7U, 8)); |
xorjoep | 1:24714b45cd1b | 359 | out3 = (q7_t) (__SSAT(acc3 >> 7U, 8)); |
xorjoep | 1:24714b45cd1b | 360 | |
xorjoep | 1:24714b45cd1b | 361 | *__SIMD32(pOut)++ = __PACKq7(out0, out1, out2, out3); |
xorjoep | 1:24714b45cd1b | 362 | |
xorjoep | 1:24714b45cd1b | 363 | /* Initialization of inputB pointer */ |
xorjoep | 1:24714b45cd1b | 364 | pScr2 = py; |
xorjoep | 1:24714b45cd1b | 365 | |
xorjoep | 1:24714b45cd1b | 366 | pScratch1 += 4U; |
xorjoep | 1:24714b45cd1b | 367 | |
xorjoep | 1:24714b45cd1b | 368 | } |
xorjoep | 1:24714b45cd1b | 369 | |
xorjoep | 1:24714b45cd1b | 370 | |
xorjoep | 1:24714b45cd1b | 371 | blkCnt = (srcALen + srcBLen - 1U) & 0x3; |
xorjoep | 1:24714b45cd1b | 372 | |
xorjoep | 1:24714b45cd1b | 373 | /* Calculate convolution for remaining samples of Bigger length sequence */ |
xorjoep | 1:24714b45cd1b | 374 | while (blkCnt > 0) |
xorjoep | 1:24714b45cd1b | 375 | { |
xorjoep | 1:24714b45cd1b | 376 | /* Initialze temporary scratch pointer as scratch1 */ |
xorjoep | 1:24714b45cd1b | 377 | pScr1 = pScratch1; |
xorjoep | 1:24714b45cd1b | 378 | |
xorjoep | 1:24714b45cd1b | 379 | /* Clear Accumlators */ |
xorjoep | 1:24714b45cd1b | 380 | acc0 = 0; |
xorjoep | 1:24714b45cd1b | 381 | |
xorjoep | 1:24714b45cd1b | 382 | tapCnt = (srcBLen) >> 1U; |
xorjoep | 1:24714b45cd1b | 383 | |
xorjoep | 1:24714b45cd1b | 384 | while (tapCnt > 0U) |
xorjoep | 1:24714b45cd1b | 385 | { |
xorjoep | 1:24714b45cd1b | 386 | acc0 += (*pScr1++ * *pScr2++); |
xorjoep | 1:24714b45cd1b | 387 | acc0 += (*pScr1++ * *pScr2++); |
xorjoep | 1:24714b45cd1b | 388 | |
xorjoep | 1:24714b45cd1b | 389 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 390 | tapCnt--; |
xorjoep | 1:24714b45cd1b | 391 | } |
xorjoep | 1:24714b45cd1b | 392 | |
xorjoep | 1:24714b45cd1b | 393 | tapCnt = (srcBLen) & 1U; |
xorjoep | 1:24714b45cd1b | 394 | |
xorjoep | 1:24714b45cd1b | 395 | /* apply same above for remaining samples of smaller length sequence */ |
xorjoep | 1:24714b45cd1b | 396 | while (tapCnt > 0U) |
xorjoep | 1:24714b45cd1b | 397 | { |
xorjoep | 1:24714b45cd1b | 398 | |
xorjoep | 1:24714b45cd1b | 399 | /* accumlate the results */ |
xorjoep | 1:24714b45cd1b | 400 | acc0 += (*pScr1++ * *pScr2++); |
xorjoep | 1:24714b45cd1b | 401 | |
xorjoep | 1:24714b45cd1b | 402 | /* Decrement the loop counter */ |
xorjoep | 1:24714b45cd1b | 403 | tapCnt--; |
xorjoep | 1:24714b45cd1b | 404 | } |
xorjoep | 1:24714b45cd1b | 405 | |
xorjoep | 1:24714b45cd1b | 406 | blkCnt--; |
xorjoep | 1:24714b45cd1b | 407 | |
xorjoep | 1:24714b45cd1b | 408 | /* Store the result in the accumulator in the destination buffer. */ |
xorjoep | 1:24714b45cd1b | 409 | *pOut++ = (q7_t) (__SSAT(acc0 >> 7U, 8)); |
xorjoep | 1:24714b45cd1b | 410 | |
xorjoep | 1:24714b45cd1b | 411 | /* Initialization of inputB pointer */ |
xorjoep | 1:24714b45cd1b | 412 | pScr2 = py; |
xorjoep | 1:24714b45cd1b | 413 | |
xorjoep | 1:24714b45cd1b | 414 | pScratch1 += 1U; |
xorjoep | 1:24714b45cd1b | 415 | |
xorjoep | 1:24714b45cd1b | 416 | } |
xorjoep | 1:24714b45cd1b | 417 | |
xorjoep | 1:24714b45cd1b | 418 | } |
xorjoep | 1:24714b45cd1b | 419 | |
xorjoep | 1:24714b45cd1b | 420 | |
xorjoep | 1:24714b45cd1b | 421 | /** |
xorjoep | 1:24714b45cd1b | 422 | * @} end of Conv group |
xorjoep | 1:24714b45cd1b | 423 | */ |