Eli Hughes / CMSIS_DSP_401

V4.0.1 of the ARM CMSIS DSP libraries. Note that arm_bitreversal2.s, arm_cfft_f32.c and arm_rfft_fast_f32.c had to be removed. arm_bitreversal2.s will not assemble with the online tools. So, the fast f32 FFT functions are not yet available. All the other FFT functions are available.

Dependents:   MPU9150_Example fir_f32 fir_f32 MPU9150_nucleo_noni2cdev ... more

FilteringFunctions/arm_conv_opt_q15.c@0:3d9c67d97d6f, 2014-07-28 (annotated)

Committer:
emh203
Date:
Mon Jul 28 15:03:15 2014 +0000
Revision:
0:3d9c67d97d6f
1st working commit.   Had to remove arm_bitreversal2.s     arm_cfft_f32.c and arm_rfft_fast_f32.c.    The .s will not assemble.      For now I removed these functions so we could at least have a library for the other functions.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emh203 0:3d9c67d97d6f 1 /* ----------------------------------------------------------------------
emh203 0:3d9c67d97d6f 2 * Copyright (C) 2010-2014 ARM Limited. All rights reserved.
emh203 0:3d9c67d97d6f 3 *
emh203 0:3d9c67d97d6f 4 * $Date: 12. March 2014
emh203 0:3d9c67d97d6f 5 * $Revision: V1.4.3
emh203 0:3d9c67d97d6f 6 *
emh203 0:3d9c67d97d6f 7 * Project: CMSIS DSP Library
emh203 0:3d9c67d97d6f 8 * Title: arm_conv_opt_q15.c
emh203 0:3d9c67d97d6f 9 *
emh203 0:3d9c67d97d6f 10 * Description: Convolution of Q15 sequences.
emh203 0:3d9c67d97d6f 11 *
emh203 0:3d9c67d97d6f 12 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
emh203 0:3d9c67d97d6f 13 *
emh203 0:3d9c67d97d6f 14 * Redistribution and use in source and binary forms, with or without
emh203 0:3d9c67d97d6f 15 * modification, are permitted provided that the following conditions
emh203 0:3d9c67d97d6f 16 * are met:
emh203 0:3d9c67d97d6f 17 * - Redistributions of source code must retain the above copyright
emh203 0:3d9c67d97d6f 18 * notice, this list of conditions and the following disclaimer.
emh203 0:3d9c67d97d6f 19 * - Redistributions in binary form must reproduce the above copyright
emh203 0:3d9c67d97d6f 20 * notice, this list of conditions and the following disclaimer in
emh203 0:3d9c67d97d6f 21 * the documentation and/or other materials provided with the
emh203 0:3d9c67d97d6f 22 * distribution.
emh203 0:3d9c67d97d6f 23 * - Neither the name of ARM LIMITED nor the names of its contributors
emh203 0:3d9c67d97d6f 24 * may be used to endorse or promote products derived from this
emh203 0:3d9c67d97d6f 25 * software without specific prior written permission.
emh203 0:3d9c67d97d6f 26 *
emh203 0:3d9c67d97d6f 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
emh203 0:3d9c67d97d6f 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
emh203 0:3d9c67d97d6f 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
emh203 0:3d9c67d97d6f 30 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
emh203 0:3d9c67d97d6f 31 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
emh203 0:3d9c67d97d6f 32 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
emh203 0:3d9c67d97d6f 33 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
emh203 0:3d9c67d97d6f 34 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
emh203 0:3d9c67d97d6f 35 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
emh203 0:3d9c67d97d6f 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
emh203 0:3d9c67d97d6f 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
emh203 0:3d9c67d97d6f 38 * POSSIBILITY OF SUCH DAMAGE.
emh203 0:3d9c67d97d6f 39 * -------------------------------------------------------------------- */
emh203 0:3d9c67d97d6f 40
emh203 0:3d9c67d97d6f 41 #include "arm_math.h"
emh203 0:3d9c67d97d6f 42
emh203 0:3d9c67d97d6f 43 /**
emh203 0:3d9c67d97d6f 44 * @ingroup groupFilters
emh203 0:3d9c67d97d6f 45 */
emh203 0:3d9c67d97d6f 46
emh203 0:3d9c67d97d6f 47 /**
emh203 0:3d9c67d97d6f 48 * @addtogroup Conv
emh203 0:3d9c67d97d6f 49 * @{
emh203 0:3d9c67d97d6f 50 */
emh203 0:3d9c67d97d6f 51
emh203 0:3d9c67d97d6f 52 /**
emh203 0:3d9c67d97d6f 53 * @brief Convolution of Q15 sequences.
emh203 0:3d9c67d97d6f 54 * @param[in] *pSrcA points to the first input sequence.
emh203 0:3d9c67d97d6f 55 * @param[in] srcALen length of the first input sequence.
emh203 0:3d9c67d97d6f 56 * @param[in] *pSrcB points to the second input sequence.
emh203 0:3d9c67d97d6f 57 * @param[in] srcBLen length of the second input sequence.
emh203 0:3d9c67d97d6f 58 * @param[out] *pDst points to the location where the output result is written. Length srcALen+srcBLen-1.
emh203 0:3d9c67d97d6f 59 * @param[in] *pScratch1 points to scratch buffer of size max(srcALen, srcBLen) + 2*min(srcALen, srcBLen) - 2.
emh203 0:3d9c67d97d6f 60 * @param[in] *pScratch2 points to scratch buffer of size min(srcALen, srcBLen).
emh203 0:3d9c67d97d6f 61 * @return none.
emh203 0:3d9c67d97d6f 62 *
emh203 0:3d9c67d97d6f 63 * \par Restrictions
emh203 0:3d9c67d97d6f 64 * If the silicon does not support unaligned memory access enable the macro UNALIGNED_SUPPORT_DISABLE
emh203 0:3d9c67d97d6f 65 * In this case input, output, scratch1 and scratch2 buffers should be aligned by 32-bit
emh203 0:3d9c67d97d6f 66 *
emh203 0:3d9c67d97d6f 67 *
emh203 0:3d9c67d97d6f 68 * @details
emh203 0:3d9c67d97d6f 69 * <b>Scaling and Overflow Behavior:</b>
emh203 0:3d9c67d97d6f 70 *
emh203 0:3d9c67d97d6f 71 * \par
emh203 0:3d9c67d97d6f 72 * The function is implemented using a 64-bit internal accumulator.
emh203 0:3d9c67d97d6f 73 * Both inputs are in 1.15 format and multiplications yield a 2.30 result.
emh203 0:3d9c67d97d6f 74 * The 2.30 intermediate results are accumulated in a 64-bit accumulator in 34.30 format.
emh203 0:3d9c67d97d6f 75 * This approach provides 33 guard bits and there is no risk of overflow.
emh203 0:3d9c67d97d6f 76 * The 34.30 result is then truncated to 34.15 format by discarding the low 15 bits and then saturated to 1.15 format.
emh203 0:3d9c67d97d6f 77 *
emh203 0:3d9c67d97d6f 78 *
emh203 0:3d9c67d97d6f 79 * \par
emh203 0:3d9c67d97d6f 80 * Refer to <code>arm_conv_fast_q15()</code> for a faster but less precise version of this function for Cortex-M3 and Cortex-M4.
emh203 0:3d9c67d97d6f 81 *
emh203 0:3d9c67d97d6f 82 *
emh203 0:3d9c67d97d6f 83 */
emh203 0:3d9c67d97d6f 84
emh203 0:3d9c67d97d6f 85 void arm_conv_opt_q15(
emh203 0:3d9c67d97d6f 86 q15_t * pSrcA,
emh203 0:3d9c67d97d6f 87 uint32_t srcALen,
emh203 0:3d9c67d97d6f 88 q15_t * pSrcB,
emh203 0:3d9c67d97d6f 89 uint32_t srcBLen,
emh203 0:3d9c67d97d6f 90 q15_t * pDst,
emh203 0:3d9c67d97d6f 91 q15_t * pScratch1,
emh203 0:3d9c67d97d6f 92 q15_t * pScratch2)
emh203 0:3d9c67d97d6f 93 {
emh203 0:3d9c67d97d6f 94 q63_t acc0, acc1, acc2, acc3; /* Accumulator */
emh203 0:3d9c67d97d6f 95 q31_t x1, x2, x3; /* Temporary variables to hold state and coefficient values */
emh203 0:3d9c67d97d6f 96 q31_t y1, y2; /* State variables */
emh203 0:3d9c67d97d6f 97 q15_t *pOut = pDst; /* output pointer */
emh203 0:3d9c67d97d6f 98 q15_t *pScr1 = pScratch1; /* Temporary pointer for scratch1 */
emh203 0:3d9c67d97d6f 99 q15_t *pScr2 = pScratch2; /* Temporary pointer for scratch1 */
emh203 0:3d9c67d97d6f 100 q15_t *pIn1; /* inputA pointer */
emh203 0:3d9c67d97d6f 101 q15_t *pIn2; /* inputB pointer */
emh203 0:3d9c67d97d6f 102 q15_t *px; /* Intermediate inputA pointer */
emh203 0:3d9c67d97d6f 103 q15_t *py; /* Intermediate inputB pointer */
emh203 0:3d9c67d97d6f 104 uint32_t j, k, blkCnt; /* loop counter */
emh203 0:3d9c67d97d6f 105 uint32_t tapCnt; /* loop count */
emh203 0:3d9c67d97d6f 106 #ifdef UNALIGNED_SUPPORT_DISABLE
emh203 0:3d9c67d97d6f 107
emh203 0:3d9c67d97d6f 108 q15_t a, b;
emh203 0:3d9c67d97d6f 109
emh203 0:3d9c67d97d6f 110 #endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
emh203 0:3d9c67d97d6f 111
emh203 0:3d9c67d97d6f 112 /* The algorithm implementation is based on the lengths of the inputs. */
emh203 0:3d9c67d97d6f 113 /* srcB is always made to slide across srcA. */
emh203 0:3d9c67d97d6f 114 /* So srcBLen is always considered as shorter or equal to srcALen */
emh203 0:3d9c67d97d6f 115 if(srcALen >= srcBLen)
emh203 0:3d9c67d97d6f 116 {
emh203 0:3d9c67d97d6f 117 /* Initialization of inputA pointer */
emh203 0:3d9c67d97d6f 118 pIn1 = pSrcA;
emh203 0:3d9c67d97d6f 119
emh203 0:3d9c67d97d6f 120 /* Initialization of inputB pointer */
emh203 0:3d9c67d97d6f 121 pIn2 = pSrcB;
emh203 0:3d9c67d97d6f 122
emh203 0:3d9c67d97d6f 123 }
emh203 0:3d9c67d97d6f 124 else
emh203 0:3d9c67d97d6f 125 {
emh203 0:3d9c67d97d6f 126 /* Initialization of inputA pointer */
emh203 0:3d9c67d97d6f 127 pIn1 = pSrcB;
emh203 0:3d9c67d97d6f 128
emh203 0:3d9c67d97d6f 129 /* Initialization of inputB pointer */
emh203 0:3d9c67d97d6f 130 pIn2 = pSrcA;
emh203 0:3d9c67d97d6f 131
emh203 0:3d9c67d97d6f 132 /* srcBLen is always considered as shorter or equal to srcALen */
emh203 0:3d9c67d97d6f 133 j = srcBLen;
emh203 0:3d9c67d97d6f 134 srcBLen = srcALen;
emh203 0:3d9c67d97d6f 135 srcALen = j;
emh203 0:3d9c67d97d6f 136 }
emh203 0:3d9c67d97d6f 137
emh203 0:3d9c67d97d6f 138 /* pointer to take end of scratch2 buffer */
emh203 0:3d9c67d97d6f 139 pScr2 = pScratch2 + srcBLen - 1;
emh203 0:3d9c67d97d6f 140
emh203 0:3d9c67d97d6f 141 /* points to smaller length sequence */
emh203 0:3d9c67d97d6f 142 px = pIn2;
emh203 0:3d9c67d97d6f 143
emh203 0:3d9c67d97d6f 144 /* Apply loop unrolling and do 4 Copies simultaneously. */
emh203 0:3d9c67d97d6f 145 k = srcBLen >> 2u;
emh203 0:3d9c67d97d6f 146
emh203 0:3d9c67d97d6f 147 /* First part of the processing with loop unrolling copies 4 data points at a time.
emh203 0:3d9c67d97d6f 148 ** a second loop below copies for the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 149 /* Copy smaller length input sequence in reverse order into second scratch buffer */
emh203 0:3d9c67d97d6f 150 while(k > 0u)
emh203 0:3d9c67d97d6f 151 {
emh203 0:3d9c67d97d6f 152 /* copy second buffer in reversal manner */
emh203 0:3d9c67d97d6f 153 *pScr2-- = *px++;
emh203 0:3d9c67d97d6f 154 *pScr2-- = *px++;
emh203 0:3d9c67d97d6f 155 *pScr2-- = *px++;
emh203 0:3d9c67d97d6f 156 *pScr2-- = *px++;
emh203 0:3d9c67d97d6f 157
emh203 0:3d9c67d97d6f 158 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 159 k--;
emh203 0:3d9c67d97d6f 160 }
emh203 0:3d9c67d97d6f 161
emh203 0:3d9c67d97d6f 162 /* If the count is not a multiple of 4, copy remaining samples here.
emh203 0:3d9c67d97d6f 163 ** No loop unrolling is used. */
emh203 0:3d9c67d97d6f 164 k = srcBLen % 0x4u;
emh203 0:3d9c67d97d6f 165
emh203 0:3d9c67d97d6f 166 while(k > 0u)
emh203 0:3d9c67d97d6f 167 {
emh203 0:3d9c67d97d6f 168 /* copy second buffer in reversal manner for remaining samples */
emh203 0:3d9c67d97d6f 169 *pScr2-- = *px++;
emh203 0:3d9c67d97d6f 170
emh203 0:3d9c67d97d6f 171 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 172 k--;
emh203 0:3d9c67d97d6f 173 }
emh203 0:3d9c67d97d6f 174
emh203 0:3d9c67d97d6f 175 /* Initialze temporary scratch pointer */
emh203 0:3d9c67d97d6f 176 pScr1 = pScratch1;
emh203 0:3d9c67d97d6f 177
emh203 0:3d9c67d97d6f 178 /* Assuming scratch1 buffer is aligned by 32-bit */
emh203 0:3d9c67d97d6f 179 /* Fill (srcBLen - 1u) zeros in scratch buffer */
emh203 0:3d9c67d97d6f 180 arm_fill_q15(0, pScr1, (srcBLen - 1u));
emh203 0:3d9c67d97d6f 181
emh203 0:3d9c67d97d6f 182 /* Update temporary scratch pointer */
emh203 0:3d9c67d97d6f 183 pScr1 += (srcBLen - 1u);
emh203 0:3d9c67d97d6f 184
emh203 0:3d9c67d97d6f 185 /* Copy bigger length sequence(srcALen) samples in scratch1 buffer */
emh203 0:3d9c67d97d6f 186
emh203 0:3d9c67d97d6f 187 #ifndef UNALIGNED_SUPPORT_DISABLE
emh203 0:3d9c67d97d6f 188
emh203 0:3d9c67d97d6f 189 /* Copy (srcALen) samples in scratch buffer */
emh203 0:3d9c67d97d6f 190 arm_copy_q15(pIn1, pScr1, srcALen);
emh203 0:3d9c67d97d6f 191
emh203 0:3d9c67d97d6f 192 /* Update pointers */
emh203 0:3d9c67d97d6f 193 pScr1 += srcALen;
emh203 0:3d9c67d97d6f 194
emh203 0:3d9c67d97d6f 195 #else
emh203 0:3d9c67d97d6f 196
emh203 0:3d9c67d97d6f 197 /* Apply loop unrolling and do 4 Copies simultaneously. */
emh203 0:3d9c67d97d6f 198 k = srcALen >> 2u;
emh203 0:3d9c67d97d6f 199
emh203 0:3d9c67d97d6f 200 /* First part of the processing with loop unrolling copies 4 data points at a time.
emh203 0:3d9c67d97d6f 201 ** a second loop below copies for the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 202 while(k > 0u)
emh203 0:3d9c67d97d6f 203 {
emh203 0:3d9c67d97d6f 204 /* copy second buffer in reversal manner */
emh203 0:3d9c67d97d6f 205 *pScr1++ = *pIn1++;
emh203 0:3d9c67d97d6f 206 *pScr1++ = *pIn1++;
emh203 0:3d9c67d97d6f 207 *pScr1++ = *pIn1++;
emh203 0:3d9c67d97d6f 208 *pScr1++ = *pIn1++;
emh203 0:3d9c67d97d6f 209
emh203 0:3d9c67d97d6f 210 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 211 k--;
emh203 0:3d9c67d97d6f 212 }
emh203 0:3d9c67d97d6f 213
emh203 0:3d9c67d97d6f 214 /* If the count is not a multiple of 4, copy remaining samples here.
emh203 0:3d9c67d97d6f 215 ** No loop unrolling is used. */
emh203 0:3d9c67d97d6f 216 k = srcALen % 0x4u;
emh203 0:3d9c67d97d6f 217
emh203 0:3d9c67d97d6f 218 while(k > 0u)
emh203 0:3d9c67d97d6f 219 {
emh203 0:3d9c67d97d6f 220 /* copy second buffer in reversal manner for remaining samples */
emh203 0:3d9c67d97d6f 221 *pScr1++ = *pIn1++;
emh203 0:3d9c67d97d6f 222
emh203 0:3d9c67d97d6f 223 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 224 k--;
emh203 0:3d9c67d97d6f 225 }
emh203 0:3d9c67d97d6f 226
emh203 0:3d9c67d97d6f 227 #endif
emh203 0:3d9c67d97d6f 228
emh203 0:3d9c67d97d6f 229
emh203 0:3d9c67d97d6f 230 #ifndef UNALIGNED_SUPPORT_DISABLE
emh203 0:3d9c67d97d6f 231
emh203 0:3d9c67d97d6f 232 /* Fill (srcBLen - 1u) zeros at end of scratch buffer */
emh203 0:3d9c67d97d6f 233 arm_fill_q15(0, pScr1, (srcBLen - 1u));
emh203 0:3d9c67d97d6f 234
emh203 0:3d9c67d97d6f 235 /* Update pointer */
emh203 0:3d9c67d97d6f 236 pScr1 += (srcBLen - 1u);
emh203 0:3d9c67d97d6f 237
emh203 0:3d9c67d97d6f 238 #else
emh203 0:3d9c67d97d6f 239
emh203 0:3d9c67d97d6f 240 /* Apply loop unrolling and do 4 Copies simultaneously. */
emh203 0:3d9c67d97d6f 241 k = (srcBLen - 1u) >> 2u;
emh203 0:3d9c67d97d6f 242
emh203 0:3d9c67d97d6f 243 /* First part of the processing with loop unrolling copies 4 data points at a time.
emh203 0:3d9c67d97d6f 244 ** a second loop below copies for the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 245 while(k > 0u)
emh203 0:3d9c67d97d6f 246 {
emh203 0:3d9c67d97d6f 247 /* copy second buffer in reversal manner */
emh203 0:3d9c67d97d6f 248 *pScr1++ = 0;
emh203 0:3d9c67d97d6f 249 *pScr1++ = 0;
emh203 0:3d9c67d97d6f 250 *pScr1++ = 0;
emh203 0:3d9c67d97d6f 251 *pScr1++ = 0;
emh203 0:3d9c67d97d6f 252
emh203 0:3d9c67d97d6f 253 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 254 k--;
emh203 0:3d9c67d97d6f 255 }
emh203 0:3d9c67d97d6f 256
emh203 0:3d9c67d97d6f 257 /* If the count is not a multiple of 4, copy remaining samples here.
emh203 0:3d9c67d97d6f 258 ** No loop unrolling is used. */
emh203 0:3d9c67d97d6f 259 k = (srcBLen - 1u) % 0x4u;
emh203 0:3d9c67d97d6f 260
emh203 0:3d9c67d97d6f 261 while(k > 0u)
emh203 0:3d9c67d97d6f 262 {
emh203 0:3d9c67d97d6f 263 /* copy second buffer in reversal manner for remaining samples */
emh203 0:3d9c67d97d6f 264 *pScr1++ = 0;
emh203 0:3d9c67d97d6f 265
emh203 0:3d9c67d97d6f 266 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 267 k--;
emh203 0:3d9c67d97d6f 268 }
emh203 0:3d9c67d97d6f 269
emh203 0:3d9c67d97d6f 270 #endif
emh203 0:3d9c67d97d6f 271
emh203 0:3d9c67d97d6f 272 /* Temporary pointer for scratch2 */
emh203 0:3d9c67d97d6f 273 py = pScratch2;
emh203 0:3d9c67d97d6f 274
emh203 0:3d9c67d97d6f 275
emh203 0:3d9c67d97d6f 276 /* Initialization of pIn2 pointer */
emh203 0:3d9c67d97d6f 277 pIn2 = py;
emh203 0:3d9c67d97d6f 278
emh203 0:3d9c67d97d6f 279 /* First part of the processing with loop unrolling process 4 data points at a time.
emh203 0:3d9c67d97d6f 280 ** a second loop below process for the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 281
emh203 0:3d9c67d97d6f 282 /* Actual convolution process starts here */
emh203 0:3d9c67d97d6f 283 blkCnt = (srcALen + srcBLen - 1u) >> 2;
emh203 0:3d9c67d97d6f 284
emh203 0:3d9c67d97d6f 285 while(blkCnt > 0)
emh203 0:3d9c67d97d6f 286 {
emh203 0:3d9c67d97d6f 287 /* Initialze temporary scratch pointer as scratch1 */
emh203 0:3d9c67d97d6f 288 pScr1 = pScratch1;
emh203 0:3d9c67d97d6f 289
emh203 0:3d9c67d97d6f 290 /* Clear Accumlators */
emh203 0:3d9c67d97d6f 291 acc0 = 0;
emh203 0:3d9c67d97d6f 292 acc1 = 0;
emh203 0:3d9c67d97d6f 293 acc2 = 0;
emh203 0:3d9c67d97d6f 294 acc3 = 0;
emh203 0:3d9c67d97d6f 295
emh203 0:3d9c67d97d6f 296 /* Read two samples from scratch1 buffer */
emh203 0:3d9c67d97d6f 297 x1 = *__SIMD32(pScr1)++;
emh203 0:3d9c67d97d6f 298
emh203 0:3d9c67d97d6f 299 /* Read next two samples from scratch1 buffer */
emh203 0:3d9c67d97d6f 300 x2 = *__SIMD32(pScr1)++;
emh203 0:3d9c67d97d6f 301
emh203 0:3d9c67d97d6f 302 tapCnt = (srcBLen) >> 2u;
emh203 0:3d9c67d97d6f 303
emh203 0:3d9c67d97d6f 304 while(tapCnt > 0u)
emh203 0:3d9c67d97d6f 305 {
emh203 0:3d9c67d97d6f 306
emh203 0:3d9c67d97d6f 307 #ifndef UNALIGNED_SUPPORT_DISABLE
emh203 0:3d9c67d97d6f 308
emh203 0:3d9c67d97d6f 309 /* Read four samples from smaller buffer */
emh203 0:3d9c67d97d6f 310 y1 = _SIMD32_OFFSET(pIn2);
emh203 0:3d9c67d97d6f 311 y2 = _SIMD32_OFFSET(pIn2 + 2u);
emh203 0:3d9c67d97d6f 312
emh203 0:3d9c67d97d6f 313 /* multiply and accumlate */
emh203 0:3d9c67d97d6f 314 acc0 = __SMLALD(x1, y1, acc0);
emh203 0:3d9c67d97d6f 315 acc2 = __SMLALD(x2, y1, acc2);
emh203 0:3d9c67d97d6f 316
emh203 0:3d9c67d97d6f 317 /* pack input data */
emh203 0:3d9c67d97d6f 318 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 319 x3 = __PKHBT(x2, x1, 0);
emh203 0:3d9c67d97d6f 320 #else
emh203 0:3d9c67d97d6f 321 x3 = __PKHBT(x1, x2, 0);
emh203 0:3d9c67d97d6f 322 #endif
emh203 0:3d9c67d97d6f 323
emh203 0:3d9c67d97d6f 324 /* multiply and accumlate */
emh203 0:3d9c67d97d6f 325 acc1 = __SMLALDX(x3, y1, acc1);
emh203 0:3d9c67d97d6f 326
emh203 0:3d9c67d97d6f 327 /* Read next two samples from scratch1 buffer */
emh203 0:3d9c67d97d6f 328 x1 = _SIMD32_OFFSET(pScr1);
emh203 0:3d9c67d97d6f 329
emh203 0:3d9c67d97d6f 330 /* multiply and accumlate */
emh203 0:3d9c67d97d6f 331 acc0 = __SMLALD(x2, y2, acc0);
emh203 0:3d9c67d97d6f 332 acc2 = __SMLALD(x1, y2, acc2);
emh203 0:3d9c67d97d6f 333
emh203 0:3d9c67d97d6f 334 /* pack input data */
emh203 0:3d9c67d97d6f 335 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 336 x3 = __PKHBT(x1, x2, 0);
emh203 0:3d9c67d97d6f 337 #else
emh203 0:3d9c67d97d6f 338 x3 = __PKHBT(x2, x1, 0);
emh203 0:3d9c67d97d6f 339 #endif
emh203 0:3d9c67d97d6f 340
emh203 0:3d9c67d97d6f 341 acc3 = __SMLALDX(x3, y1, acc3);
emh203 0:3d9c67d97d6f 342 acc1 = __SMLALDX(x3, y2, acc1);
emh203 0:3d9c67d97d6f 343
emh203 0:3d9c67d97d6f 344 x2 = _SIMD32_OFFSET(pScr1 + 2u);
emh203 0:3d9c67d97d6f 345
emh203 0:3d9c67d97d6f 346 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 347 x3 = __PKHBT(x2, x1, 0);
emh203 0:3d9c67d97d6f 348 #else
emh203 0:3d9c67d97d6f 349 x3 = __PKHBT(x1, x2, 0);
emh203 0:3d9c67d97d6f 350 #endif
emh203 0:3d9c67d97d6f 351
emh203 0:3d9c67d97d6f 352 acc3 = __SMLALDX(x3, y2, acc3);
emh203 0:3d9c67d97d6f 353
emh203 0:3d9c67d97d6f 354 #else
emh203 0:3d9c67d97d6f 355
emh203 0:3d9c67d97d6f 356 /* Read four samples from smaller buffer */
emh203 0:3d9c67d97d6f 357 a = *pIn2;
emh203 0:3d9c67d97d6f 358 b = *(pIn2 + 1);
emh203 0:3d9c67d97d6f 359
emh203 0:3d9c67d97d6f 360 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 361 y1 = __PKHBT(a, b, 16);
emh203 0:3d9c67d97d6f 362 #else
emh203 0:3d9c67d97d6f 363 y1 = __PKHBT(b, a, 16);
emh203 0:3d9c67d97d6f 364 #endif
emh203 0:3d9c67d97d6f 365
emh203 0:3d9c67d97d6f 366 a = *(pIn2 + 2);
emh203 0:3d9c67d97d6f 367 b = *(pIn2 + 3);
emh203 0:3d9c67d97d6f 368 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 369 y2 = __PKHBT(a, b, 16);
emh203 0:3d9c67d97d6f 370 #else
emh203 0:3d9c67d97d6f 371 y2 = __PKHBT(b, a, 16);
emh203 0:3d9c67d97d6f 372 #endif
emh203 0:3d9c67d97d6f 373
emh203 0:3d9c67d97d6f 374 acc0 = __SMLALD(x1, y1, acc0);
emh203 0:3d9c67d97d6f 375
emh203 0:3d9c67d97d6f 376 acc2 = __SMLALD(x2, y1, acc2);
emh203 0:3d9c67d97d6f 377
emh203 0:3d9c67d97d6f 378 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 379 x3 = __PKHBT(x2, x1, 0);
emh203 0:3d9c67d97d6f 380 #else
emh203 0:3d9c67d97d6f 381 x3 = __PKHBT(x1, x2, 0);
emh203 0:3d9c67d97d6f 382 #endif
emh203 0:3d9c67d97d6f 383
emh203 0:3d9c67d97d6f 384 acc1 = __SMLALDX(x3, y1, acc1);
emh203 0:3d9c67d97d6f 385
emh203 0:3d9c67d97d6f 386 a = *pScr1;
emh203 0:3d9c67d97d6f 387 b = *(pScr1 + 1);
emh203 0:3d9c67d97d6f 388
emh203 0:3d9c67d97d6f 389 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 390 x1 = __PKHBT(a, b, 16);
emh203 0:3d9c67d97d6f 391 #else
emh203 0:3d9c67d97d6f 392 x1 = __PKHBT(b, a, 16);
emh203 0:3d9c67d97d6f 393 #endif
emh203 0:3d9c67d97d6f 394
emh203 0:3d9c67d97d6f 395 acc0 = __SMLALD(x2, y2, acc0);
emh203 0:3d9c67d97d6f 396
emh203 0:3d9c67d97d6f 397 acc2 = __SMLALD(x1, y2, acc2);
emh203 0:3d9c67d97d6f 398
emh203 0:3d9c67d97d6f 399 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 400 x3 = __PKHBT(x1, x2, 0);
emh203 0:3d9c67d97d6f 401 #else
emh203 0:3d9c67d97d6f 402 x3 = __PKHBT(x2, x1, 0);
emh203 0:3d9c67d97d6f 403 #endif
emh203 0:3d9c67d97d6f 404
emh203 0:3d9c67d97d6f 405 acc3 = __SMLALDX(x3, y1, acc3);
emh203 0:3d9c67d97d6f 406
emh203 0:3d9c67d97d6f 407 acc1 = __SMLALDX(x3, y2, acc1);
emh203 0:3d9c67d97d6f 408
emh203 0:3d9c67d97d6f 409 a = *(pScr1 + 2);
emh203 0:3d9c67d97d6f 410 b = *(pScr1 + 3);
emh203 0:3d9c67d97d6f 411
emh203 0:3d9c67d97d6f 412 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 413 x2 = __PKHBT(a, b, 16);
emh203 0:3d9c67d97d6f 414 #else
emh203 0:3d9c67d97d6f 415 x2 = __PKHBT(b, a, 16);
emh203 0:3d9c67d97d6f 416 #endif
emh203 0:3d9c67d97d6f 417
emh203 0:3d9c67d97d6f 418 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 419 x3 = __PKHBT(x2, x1, 0);
emh203 0:3d9c67d97d6f 420 #else
emh203 0:3d9c67d97d6f 421 x3 = __PKHBT(x1, x2, 0);
emh203 0:3d9c67d97d6f 422 #endif
emh203 0:3d9c67d97d6f 423
emh203 0:3d9c67d97d6f 424 acc3 = __SMLALDX(x3, y2, acc3);
emh203 0:3d9c67d97d6f 425
emh203 0:3d9c67d97d6f 426 #endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
emh203 0:3d9c67d97d6f 427
emh203 0:3d9c67d97d6f 428 pIn2 += 4u;
emh203 0:3d9c67d97d6f 429 pScr1 += 4u;
emh203 0:3d9c67d97d6f 430
emh203 0:3d9c67d97d6f 431
emh203 0:3d9c67d97d6f 432 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 433 tapCnt--;
emh203 0:3d9c67d97d6f 434 }
emh203 0:3d9c67d97d6f 435
emh203 0:3d9c67d97d6f 436 /* Update scratch pointer for remaining samples of smaller length sequence */
emh203 0:3d9c67d97d6f 437 pScr1 -= 4u;
emh203 0:3d9c67d97d6f 438
emh203 0:3d9c67d97d6f 439 /* apply same above for remaining samples of smaller length sequence */
emh203 0:3d9c67d97d6f 440 tapCnt = (srcBLen) & 3u;
emh203 0:3d9c67d97d6f 441
emh203 0:3d9c67d97d6f 442 while(tapCnt > 0u)
emh203 0:3d9c67d97d6f 443 {
emh203 0:3d9c67d97d6f 444
emh203 0:3d9c67d97d6f 445 /* accumlate the results */
emh203 0:3d9c67d97d6f 446 acc0 += (*pScr1++ * *pIn2);
emh203 0:3d9c67d97d6f 447 acc1 += (*pScr1++ * *pIn2);
emh203 0:3d9c67d97d6f 448 acc2 += (*pScr1++ * *pIn2);
emh203 0:3d9c67d97d6f 449 acc3 += (*pScr1++ * *pIn2++);
emh203 0:3d9c67d97d6f 450
emh203 0:3d9c67d97d6f 451 pScr1 -= 3u;
emh203 0:3d9c67d97d6f 452
emh203 0:3d9c67d97d6f 453 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 454 tapCnt--;
emh203 0:3d9c67d97d6f 455 }
emh203 0:3d9c67d97d6f 456
emh203 0:3d9c67d97d6f 457 blkCnt--;
emh203 0:3d9c67d97d6f 458
emh203 0:3d9c67d97d6f 459
emh203 0:3d9c67d97d6f 460 /* Store the results in the accumulators in the destination buffer. */
emh203 0:3d9c67d97d6f 461
emh203 0:3d9c67d97d6f 462 #ifndef ARM_MATH_BIG_ENDIAN
emh203 0:3d9c67d97d6f 463
emh203 0:3d9c67d97d6f 464 *__SIMD32(pOut)++ =
emh203 0:3d9c67d97d6f 465 __PKHBT(__SSAT((acc0 >> 15), 16), __SSAT((acc1 >> 15), 16), 16);
emh203 0:3d9c67d97d6f 466
emh203 0:3d9c67d97d6f 467 *__SIMD32(pOut)++ =
emh203 0:3d9c67d97d6f 468 __PKHBT(__SSAT((acc2 >> 15), 16), __SSAT((acc3 >> 15), 16), 16);
emh203 0:3d9c67d97d6f 469
emh203 0:3d9c67d97d6f 470 #else
emh203 0:3d9c67d97d6f 471
emh203 0:3d9c67d97d6f 472 *__SIMD32(pOut)++ =
emh203 0:3d9c67d97d6f 473 __PKHBT(__SSAT((acc1 >> 15), 16), __SSAT((acc0 >> 15), 16), 16);
emh203 0:3d9c67d97d6f 474
emh203 0:3d9c67d97d6f 475 *__SIMD32(pOut)++ =
emh203 0:3d9c67d97d6f 476 __PKHBT(__SSAT((acc3 >> 15), 16), __SSAT((acc2 >> 15), 16), 16);
emh203 0:3d9c67d97d6f 477
emh203 0:3d9c67d97d6f 478
emh203 0:3d9c67d97d6f 479 #endif /* #ifndef ARM_MATH_BIG_ENDIAN */
emh203 0:3d9c67d97d6f 480
emh203 0:3d9c67d97d6f 481 /* Initialization of inputB pointer */
emh203 0:3d9c67d97d6f 482 pIn2 = py;
emh203 0:3d9c67d97d6f 483
emh203 0:3d9c67d97d6f 484 pScratch1 += 4u;
emh203 0:3d9c67d97d6f 485
emh203 0:3d9c67d97d6f 486 }
emh203 0:3d9c67d97d6f 487
emh203 0:3d9c67d97d6f 488
emh203 0:3d9c67d97d6f 489 blkCnt = (srcALen + srcBLen - 1u) & 0x3;
emh203 0:3d9c67d97d6f 490
emh203 0:3d9c67d97d6f 491 /* Calculate convolution for remaining samples of Bigger length sequence */
emh203 0:3d9c67d97d6f 492 while(blkCnt > 0)
emh203 0:3d9c67d97d6f 493 {
emh203 0:3d9c67d97d6f 494 /* Initialze temporary scratch pointer as scratch1 */
emh203 0:3d9c67d97d6f 495 pScr1 = pScratch1;
emh203 0:3d9c67d97d6f 496
emh203 0:3d9c67d97d6f 497 /* Clear Accumlators */
emh203 0:3d9c67d97d6f 498 acc0 = 0;
emh203 0:3d9c67d97d6f 499
emh203 0:3d9c67d97d6f 500 tapCnt = (srcBLen) >> 1u;
emh203 0:3d9c67d97d6f 501
emh203 0:3d9c67d97d6f 502 while(tapCnt > 0u)
emh203 0:3d9c67d97d6f 503 {
emh203 0:3d9c67d97d6f 504
emh203 0:3d9c67d97d6f 505 /* Read next two samples from scratch1 buffer */
emh203 0:3d9c67d97d6f 506 acc0 += (*pScr1++ * *pIn2++);
emh203 0:3d9c67d97d6f 507 acc0 += (*pScr1++ * *pIn2++);
emh203 0:3d9c67d97d6f 508
emh203 0:3d9c67d97d6f 509 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 510 tapCnt--;
emh203 0:3d9c67d97d6f 511 }
emh203 0:3d9c67d97d6f 512
emh203 0:3d9c67d97d6f 513 tapCnt = (srcBLen) & 1u;
emh203 0:3d9c67d97d6f 514
emh203 0:3d9c67d97d6f 515 /* apply same above for remaining samples of smaller length sequence */
emh203 0:3d9c67d97d6f 516 while(tapCnt > 0u)
emh203 0:3d9c67d97d6f 517 {
emh203 0:3d9c67d97d6f 518
emh203 0:3d9c67d97d6f 519 /* accumlate the results */
emh203 0:3d9c67d97d6f 520 acc0 += (*pScr1++ * *pIn2++);
emh203 0:3d9c67d97d6f 521
emh203 0:3d9c67d97d6f 522 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 523 tapCnt--;
emh203 0:3d9c67d97d6f 524 }
emh203 0:3d9c67d97d6f 525
emh203 0:3d9c67d97d6f 526 blkCnt--;
emh203 0:3d9c67d97d6f 527
emh203 0:3d9c67d97d6f 528 /* The result is in 2.30 format. Convert to 1.15 with saturation.
emh203 0:3d9c67d97d6f 529 ** Then store the output in the destination buffer. */
emh203 0:3d9c67d97d6f 530 *pOut++ = (q15_t) (__SSAT((acc0 >> 15), 16));
emh203 0:3d9c67d97d6f 531
emh203 0:3d9c67d97d6f 532
emh203 0:3d9c67d97d6f 533 /* Initialization of inputB pointer */
emh203 0:3d9c67d97d6f 534 pIn2 = py;
emh203 0:3d9c67d97d6f 535
emh203 0:3d9c67d97d6f 536 pScratch1 += 1u;
emh203 0:3d9c67d97d6f 537
emh203 0:3d9c67d97d6f 538 }
emh203 0:3d9c67d97d6f 539
emh203 0:3d9c67d97d6f 540 }
emh203 0:3d9c67d97d6f 541
emh203 0:3d9c67d97d6f 542
emh203 0:3d9c67d97d6f 543 /**
emh203 0:3d9c67d97d6f 544 * @} end of Conv group
emh203 0:3d9c67d97d6f 545 */