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_partial_fast_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?
User | Revision | Line number | New contents of line |
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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_partial_fast_opt_q15.c |
emh203 | 0:3d9c67d97d6f | 9 | * |
emh203 | 0:3d9c67d97d6f | 10 | * Description: Fast Q15 Partial convolution. |
emh203 | 0:3d9c67d97d6f | 11 | * |
emh203 | 0:3d9c67d97d6f | 12 | * Target Processor: Cortex-M4/Cortex-M3 |
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 PartialConv |
emh203 | 0:3d9c67d97d6f | 49 | * @{ |
emh203 | 0:3d9c67d97d6f | 50 | */ |
emh203 | 0:3d9c67d97d6f | 51 | |
emh203 | 0:3d9c67d97d6f | 52 | /** |
emh203 | 0:3d9c67d97d6f | 53 | * @brief Partial convolution of Q15 sequences (fast version) for Cortex-M3 and Cortex-M4. |
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. |
emh203 | 0:3d9c67d97d6f | 59 | * @param[in] firstIndex is the first output sample to start with. |
emh203 | 0:3d9c67d97d6f | 60 | * @param[in] numPoints is the number of output points to be computed. |
emh203 | 0:3d9c67d97d6f | 61 | * @param[in] *pScratch1 points to scratch buffer of size max(srcALen, srcBLen) + 2*min(srcALen, srcBLen) - 2. |
emh203 | 0:3d9c67d97d6f | 62 | * @param[in] *pScratch2 points to scratch buffer of size min(srcALen, srcBLen). |
emh203 | 0:3d9c67d97d6f | 63 | * @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]. |
emh203 | 0:3d9c67d97d6f | 64 | * |
emh203 | 0:3d9c67d97d6f | 65 | * See <code>arm_conv_partial_q15()</code> for a slower implementation of this function which uses a 64-bit accumulator to avoid wrap around distortion. |
emh203 | 0:3d9c67d97d6f | 66 | * |
emh203 | 0:3d9c67d97d6f | 67 | * \par Restrictions |
emh203 | 0:3d9c67d97d6f | 68 | * If the silicon does not support unaligned memory access enable the macro UNALIGNED_SUPPORT_DISABLE |
emh203 | 0:3d9c67d97d6f | 69 | * In this case input, output, scratch1 and scratch2 buffers should be aligned by 32-bit |
emh203 | 0:3d9c67d97d6f | 70 | * |
emh203 | 0:3d9c67d97d6f | 71 | */ |
emh203 | 0:3d9c67d97d6f | 72 | |
emh203 | 0:3d9c67d97d6f | 73 | #ifndef UNALIGNED_SUPPORT_DISABLE |
emh203 | 0:3d9c67d97d6f | 74 | |
emh203 | 0:3d9c67d97d6f | 75 | arm_status arm_conv_partial_fast_opt_q15( |
emh203 | 0:3d9c67d97d6f | 76 | q15_t * pSrcA, |
emh203 | 0:3d9c67d97d6f | 77 | uint32_t srcALen, |
emh203 | 0:3d9c67d97d6f | 78 | q15_t * pSrcB, |
emh203 | 0:3d9c67d97d6f | 79 | uint32_t srcBLen, |
emh203 | 0:3d9c67d97d6f | 80 | q15_t * pDst, |
emh203 | 0:3d9c67d97d6f | 81 | uint32_t firstIndex, |
emh203 | 0:3d9c67d97d6f | 82 | uint32_t numPoints, |
emh203 | 0:3d9c67d97d6f | 83 | q15_t * pScratch1, |
emh203 | 0:3d9c67d97d6f | 84 | q15_t * pScratch2) |
emh203 | 0:3d9c67d97d6f | 85 | { |
emh203 | 0:3d9c67d97d6f | 86 | |
emh203 | 0:3d9c67d97d6f | 87 | q15_t *pOut = pDst; /* output pointer */ |
emh203 | 0:3d9c67d97d6f | 88 | q15_t *pScr1 = pScratch1; /* Temporary pointer for scratch1 */ |
emh203 | 0:3d9c67d97d6f | 89 | q15_t *pScr2 = pScratch2; /* Temporary pointer for scratch1 */ |
emh203 | 0:3d9c67d97d6f | 90 | q31_t acc0, acc1, acc2, acc3; /* Accumulator */ |
emh203 | 0:3d9c67d97d6f | 91 | q31_t x1, x2, x3; /* Temporary variables to hold state and coefficient values */ |
emh203 | 0:3d9c67d97d6f | 92 | q31_t y1, y2; /* State variables */ |
emh203 | 0:3d9c67d97d6f | 93 | q15_t *pIn1; /* inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 94 | q15_t *pIn2; /* inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 95 | q15_t *px; /* Intermediate inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 96 | q15_t *py; /* Intermediate inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 97 | uint32_t j, k, blkCnt; /* loop counter */ |
emh203 | 0:3d9c67d97d6f | 98 | arm_status status; |
emh203 | 0:3d9c67d97d6f | 99 | |
emh203 | 0:3d9c67d97d6f | 100 | uint32_t tapCnt; /* loop count */ |
emh203 | 0:3d9c67d97d6f | 101 | |
emh203 | 0:3d9c67d97d6f | 102 | /* Check for range of output samples to be calculated */ |
emh203 | 0:3d9c67d97d6f | 103 | if((firstIndex + numPoints) > ((srcALen + (srcBLen - 1u)))) |
emh203 | 0:3d9c67d97d6f | 104 | { |
emh203 | 0:3d9c67d97d6f | 105 | /* Set status as ARM_MATH_ARGUMENT_ERROR */ |
emh203 | 0:3d9c67d97d6f | 106 | status = ARM_MATH_ARGUMENT_ERROR; |
emh203 | 0:3d9c67d97d6f | 107 | } |
emh203 | 0:3d9c67d97d6f | 108 | else |
emh203 | 0:3d9c67d97d6f | 109 | { |
emh203 | 0:3d9c67d97d6f | 110 | |
emh203 | 0:3d9c67d97d6f | 111 | /* The algorithm implementation is based on the lengths of the inputs. */ |
emh203 | 0:3d9c67d97d6f | 112 | /* srcB is always made to slide across srcA. */ |
emh203 | 0:3d9c67d97d6f | 113 | /* So srcBLen is always considered as shorter or equal to srcALen */ |
emh203 | 0:3d9c67d97d6f | 114 | if(srcALen >= srcBLen) |
emh203 | 0:3d9c67d97d6f | 115 | { |
emh203 | 0:3d9c67d97d6f | 116 | /* Initialization of inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 117 | pIn1 = pSrcA; |
emh203 | 0:3d9c67d97d6f | 118 | |
emh203 | 0:3d9c67d97d6f | 119 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 120 | pIn2 = pSrcB; |
emh203 | 0:3d9c67d97d6f | 121 | } |
emh203 | 0:3d9c67d97d6f | 122 | else |
emh203 | 0:3d9c67d97d6f | 123 | { |
emh203 | 0:3d9c67d97d6f | 124 | /* Initialization of inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 125 | pIn1 = pSrcB; |
emh203 | 0:3d9c67d97d6f | 126 | |
emh203 | 0:3d9c67d97d6f | 127 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 128 | pIn2 = pSrcA; |
emh203 | 0:3d9c67d97d6f | 129 | |
emh203 | 0:3d9c67d97d6f | 130 | /* srcBLen is always considered as shorter or equal to srcALen */ |
emh203 | 0:3d9c67d97d6f | 131 | j = srcBLen; |
emh203 | 0:3d9c67d97d6f | 132 | srcBLen = srcALen; |
emh203 | 0:3d9c67d97d6f | 133 | srcALen = j; |
emh203 | 0:3d9c67d97d6f | 134 | } |
emh203 | 0:3d9c67d97d6f | 135 | |
emh203 | 0:3d9c67d97d6f | 136 | /* Temporary pointer for scratch2 */ |
emh203 | 0:3d9c67d97d6f | 137 | py = pScratch2; |
emh203 | 0:3d9c67d97d6f | 138 | |
emh203 | 0:3d9c67d97d6f | 139 | /* pointer to take end of scratch2 buffer */ |
emh203 | 0:3d9c67d97d6f | 140 | pScr2 = pScratch2 + srcBLen - 1; |
emh203 | 0:3d9c67d97d6f | 141 | |
emh203 | 0:3d9c67d97d6f | 142 | /* points to smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 143 | px = pIn2; |
emh203 | 0:3d9c67d97d6f | 144 | |
emh203 | 0:3d9c67d97d6f | 145 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
emh203 | 0:3d9c67d97d6f | 146 | k = srcBLen >> 2u; |
emh203 | 0:3d9c67d97d6f | 147 | |
emh203 | 0:3d9c67d97d6f | 148 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
emh203 | 0:3d9c67d97d6f | 149 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 150 | |
emh203 | 0:3d9c67d97d6f | 151 | /* Copy smaller length input sequence in reverse order into second scratch buffer */ |
emh203 | 0:3d9c67d97d6f | 152 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 153 | { |
emh203 | 0:3d9c67d97d6f | 154 | /* copy second buffer in reversal manner */ |
emh203 | 0:3d9c67d97d6f | 155 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 156 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 157 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 158 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 159 | |
emh203 | 0:3d9c67d97d6f | 160 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 161 | k--; |
emh203 | 0:3d9c67d97d6f | 162 | } |
emh203 | 0:3d9c67d97d6f | 163 | |
emh203 | 0:3d9c67d97d6f | 164 | /* If the count is not a multiple of 4, copy remaining samples here. |
emh203 | 0:3d9c67d97d6f | 165 | ** No loop unrolling is used. */ |
emh203 | 0:3d9c67d97d6f | 166 | k = srcBLen % 0x4u; |
emh203 | 0:3d9c67d97d6f | 167 | |
emh203 | 0:3d9c67d97d6f | 168 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 169 | { |
emh203 | 0:3d9c67d97d6f | 170 | /* copy second buffer in reversal manner for remaining samples */ |
emh203 | 0:3d9c67d97d6f | 171 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 172 | |
emh203 | 0:3d9c67d97d6f | 173 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 174 | k--; |
emh203 | 0:3d9c67d97d6f | 175 | } |
emh203 | 0:3d9c67d97d6f | 176 | |
emh203 | 0:3d9c67d97d6f | 177 | /* Initialze temporary scratch pointer */ |
emh203 | 0:3d9c67d97d6f | 178 | pScr1 = pScratch1; |
emh203 | 0:3d9c67d97d6f | 179 | |
emh203 | 0:3d9c67d97d6f | 180 | /* Assuming scratch1 buffer is aligned by 32-bit */ |
emh203 | 0:3d9c67d97d6f | 181 | /* Fill (srcBLen - 1u) zeros in scratch buffer */ |
emh203 | 0:3d9c67d97d6f | 182 | arm_fill_q15(0, pScr1, (srcBLen - 1u)); |
emh203 | 0:3d9c67d97d6f | 183 | |
emh203 | 0:3d9c67d97d6f | 184 | /* Update temporary scratch pointer */ |
emh203 | 0:3d9c67d97d6f | 185 | pScr1 += (srcBLen - 1u); |
emh203 | 0:3d9c67d97d6f | 186 | |
emh203 | 0:3d9c67d97d6f | 187 | /* Copy bigger length sequence(srcALen) samples in scratch1 buffer */ |
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 | /* Fill (srcBLen - 1u) zeros at end of scratch buffer */ |
emh203 | 0:3d9c67d97d6f | 196 | arm_fill_q15(0, pScr1, (srcBLen - 1u)); |
emh203 | 0:3d9c67d97d6f | 197 | |
emh203 | 0:3d9c67d97d6f | 198 | /* Update pointer */ |
emh203 | 0:3d9c67d97d6f | 199 | pScr1 += (srcBLen - 1u); |
emh203 | 0:3d9c67d97d6f | 200 | |
emh203 | 0:3d9c67d97d6f | 201 | /* Initialization of pIn2 pointer */ |
emh203 | 0:3d9c67d97d6f | 202 | pIn2 = py; |
emh203 | 0:3d9c67d97d6f | 203 | |
emh203 | 0:3d9c67d97d6f | 204 | pScratch1 += firstIndex; |
emh203 | 0:3d9c67d97d6f | 205 | |
emh203 | 0:3d9c67d97d6f | 206 | pOut = pDst + firstIndex; |
emh203 | 0:3d9c67d97d6f | 207 | |
emh203 | 0:3d9c67d97d6f | 208 | /* First part of the processing with loop unrolling process 4 data points at a time. |
emh203 | 0:3d9c67d97d6f | 209 | ** a second loop below process for the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 210 | |
emh203 | 0:3d9c67d97d6f | 211 | /* Actual convolution process starts here */ |
emh203 | 0:3d9c67d97d6f | 212 | blkCnt = (numPoints) >> 2; |
emh203 | 0:3d9c67d97d6f | 213 | |
emh203 | 0:3d9c67d97d6f | 214 | while(blkCnt > 0) |
emh203 | 0:3d9c67d97d6f | 215 | { |
emh203 | 0:3d9c67d97d6f | 216 | /* Initialze temporary scratch pointer as scratch1 */ |
emh203 | 0:3d9c67d97d6f | 217 | pScr1 = pScratch1; |
emh203 | 0:3d9c67d97d6f | 218 | |
emh203 | 0:3d9c67d97d6f | 219 | /* Clear Accumlators */ |
emh203 | 0:3d9c67d97d6f | 220 | acc0 = 0; |
emh203 | 0:3d9c67d97d6f | 221 | acc1 = 0; |
emh203 | 0:3d9c67d97d6f | 222 | acc2 = 0; |
emh203 | 0:3d9c67d97d6f | 223 | acc3 = 0; |
emh203 | 0:3d9c67d97d6f | 224 | |
emh203 | 0:3d9c67d97d6f | 225 | /* Read two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 226 | x1 = *__SIMD32(pScr1)++; |
emh203 | 0:3d9c67d97d6f | 227 | |
emh203 | 0:3d9c67d97d6f | 228 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 229 | x2 = *__SIMD32(pScr1)++; |
emh203 | 0:3d9c67d97d6f | 230 | |
emh203 | 0:3d9c67d97d6f | 231 | tapCnt = (srcBLen) >> 2u; |
emh203 | 0:3d9c67d97d6f | 232 | |
emh203 | 0:3d9c67d97d6f | 233 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 234 | { |
emh203 | 0:3d9c67d97d6f | 235 | |
emh203 | 0:3d9c67d97d6f | 236 | /* Read four samples from smaller buffer */ |
emh203 | 0:3d9c67d97d6f | 237 | y1 = _SIMD32_OFFSET(pIn2); |
emh203 | 0:3d9c67d97d6f | 238 | y2 = _SIMD32_OFFSET(pIn2 + 2u); |
emh203 | 0:3d9c67d97d6f | 239 | |
emh203 | 0:3d9c67d97d6f | 240 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 241 | acc0 = __SMLAD(x1, y1, acc0); |
emh203 | 0:3d9c67d97d6f | 242 | acc2 = __SMLAD(x2, y1, acc2); |
emh203 | 0:3d9c67d97d6f | 243 | |
emh203 | 0:3d9c67d97d6f | 244 | /* pack input data */ |
emh203 | 0:3d9c67d97d6f | 245 | #ifndef ARM_MATH_BIG_ENDIAN |
emh203 | 0:3d9c67d97d6f | 246 | x3 = __PKHBT(x2, x1, 0); |
emh203 | 0:3d9c67d97d6f | 247 | #else |
emh203 | 0:3d9c67d97d6f | 248 | x3 = __PKHBT(x1, x2, 0); |
emh203 | 0:3d9c67d97d6f | 249 | #endif |
emh203 | 0:3d9c67d97d6f | 250 | |
emh203 | 0:3d9c67d97d6f | 251 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 252 | acc1 = __SMLADX(x3, y1, acc1); |
emh203 | 0:3d9c67d97d6f | 253 | |
emh203 | 0:3d9c67d97d6f | 254 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 255 | x1 = _SIMD32_OFFSET(pScr1); |
emh203 | 0:3d9c67d97d6f | 256 | |
emh203 | 0:3d9c67d97d6f | 257 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 258 | acc0 = __SMLAD(x2, y2, acc0); |
emh203 | 0:3d9c67d97d6f | 259 | |
emh203 | 0:3d9c67d97d6f | 260 | acc2 = __SMLAD(x1, y2, acc2); |
emh203 | 0:3d9c67d97d6f | 261 | |
emh203 | 0:3d9c67d97d6f | 262 | /* pack input data */ |
emh203 | 0:3d9c67d97d6f | 263 | #ifndef ARM_MATH_BIG_ENDIAN |
emh203 | 0:3d9c67d97d6f | 264 | x3 = __PKHBT(x1, x2, 0); |
emh203 | 0:3d9c67d97d6f | 265 | #else |
emh203 | 0:3d9c67d97d6f | 266 | x3 = __PKHBT(x2, x1, 0); |
emh203 | 0:3d9c67d97d6f | 267 | #endif |
emh203 | 0:3d9c67d97d6f | 268 | |
emh203 | 0:3d9c67d97d6f | 269 | acc3 = __SMLADX(x3, y1, acc3); |
emh203 | 0:3d9c67d97d6f | 270 | acc1 = __SMLADX(x3, y2, acc1); |
emh203 | 0:3d9c67d97d6f | 271 | |
emh203 | 0:3d9c67d97d6f | 272 | x2 = _SIMD32_OFFSET(pScr1 + 2u); |
emh203 | 0:3d9c67d97d6f | 273 | |
emh203 | 0:3d9c67d97d6f | 274 | #ifndef ARM_MATH_BIG_ENDIAN |
emh203 | 0:3d9c67d97d6f | 275 | x3 = __PKHBT(x2, x1, 0); |
emh203 | 0:3d9c67d97d6f | 276 | #else |
emh203 | 0:3d9c67d97d6f | 277 | x3 = __PKHBT(x1, x2, 0); |
emh203 | 0:3d9c67d97d6f | 278 | #endif |
emh203 | 0:3d9c67d97d6f | 279 | |
emh203 | 0:3d9c67d97d6f | 280 | acc3 = __SMLADX(x3, y2, acc3); |
emh203 | 0:3d9c67d97d6f | 281 | |
emh203 | 0:3d9c67d97d6f | 282 | /* update scratch pointers */ |
emh203 | 0:3d9c67d97d6f | 283 | pIn2 += 4u; |
emh203 | 0:3d9c67d97d6f | 284 | pScr1 += 4u; |
emh203 | 0:3d9c67d97d6f | 285 | |
emh203 | 0:3d9c67d97d6f | 286 | |
emh203 | 0:3d9c67d97d6f | 287 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 288 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 289 | } |
emh203 | 0:3d9c67d97d6f | 290 | |
emh203 | 0:3d9c67d97d6f | 291 | /* Update scratch pointer for remaining samples of smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 292 | pScr1 -= 4u; |
emh203 | 0:3d9c67d97d6f | 293 | |
emh203 | 0:3d9c67d97d6f | 294 | /* apply same above for remaining samples of smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 295 | tapCnt = (srcBLen) & 3u; |
emh203 | 0:3d9c67d97d6f | 296 | |
emh203 | 0:3d9c67d97d6f | 297 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 298 | { |
emh203 | 0:3d9c67d97d6f | 299 | |
emh203 | 0:3d9c67d97d6f | 300 | /* accumlate the results */ |
emh203 | 0:3d9c67d97d6f | 301 | acc0 += (*pScr1++ * *pIn2); |
emh203 | 0:3d9c67d97d6f | 302 | acc1 += (*pScr1++ * *pIn2); |
emh203 | 0:3d9c67d97d6f | 303 | acc2 += (*pScr1++ * *pIn2); |
emh203 | 0:3d9c67d97d6f | 304 | acc3 += (*pScr1++ * *pIn2++); |
emh203 | 0:3d9c67d97d6f | 305 | |
emh203 | 0:3d9c67d97d6f | 306 | pScr1 -= 3u; |
emh203 | 0:3d9c67d97d6f | 307 | |
emh203 | 0:3d9c67d97d6f | 308 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 309 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 310 | } |
emh203 | 0:3d9c67d97d6f | 311 | |
emh203 | 0:3d9c67d97d6f | 312 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 313 | |
emh203 | 0:3d9c67d97d6f | 314 | |
emh203 | 0:3d9c67d97d6f | 315 | /* Store the results in the accumulators in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 316 | |
emh203 | 0:3d9c67d97d6f | 317 | #ifndef ARM_MATH_BIG_ENDIAN |
emh203 | 0:3d9c67d97d6f | 318 | |
emh203 | 0:3d9c67d97d6f | 319 | *__SIMD32(pOut)++ = |
emh203 | 0:3d9c67d97d6f | 320 | __PKHBT(__SSAT((acc0 >> 15), 16), __SSAT((acc1 >> 15), 16), 16); |
emh203 | 0:3d9c67d97d6f | 321 | *__SIMD32(pOut)++ = |
emh203 | 0:3d9c67d97d6f | 322 | __PKHBT(__SSAT((acc2 >> 15), 16), __SSAT((acc3 >> 15), 16), 16); |
emh203 | 0:3d9c67d97d6f | 323 | |
emh203 | 0:3d9c67d97d6f | 324 | #else |
emh203 | 0:3d9c67d97d6f | 325 | |
emh203 | 0:3d9c67d97d6f | 326 | *__SIMD32(pOut)++ = |
emh203 | 0:3d9c67d97d6f | 327 | __PKHBT(__SSAT((acc1 >> 15), 16), __SSAT((acc0 >> 15), 16), 16); |
emh203 | 0:3d9c67d97d6f | 328 | *__SIMD32(pOut)++ = |
emh203 | 0:3d9c67d97d6f | 329 | __PKHBT(__SSAT((acc3 >> 15), 16), __SSAT((acc2 >> 15), 16), 16); |
emh203 | 0:3d9c67d97d6f | 330 | |
emh203 | 0:3d9c67d97d6f | 331 | #endif /* #ifndef ARM_MATH_BIG_ENDIAN */ |
emh203 | 0:3d9c67d97d6f | 332 | |
emh203 | 0:3d9c67d97d6f | 333 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 334 | pIn2 = py; |
emh203 | 0:3d9c67d97d6f | 335 | |
emh203 | 0:3d9c67d97d6f | 336 | pScratch1 += 4u; |
emh203 | 0:3d9c67d97d6f | 337 | |
emh203 | 0:3d9c67d97d6f | 338 | } |
emh203 | 0:3d9c67d97d6f | 339 | |
emh203 | 0:3d9c67d97d6f | 340 | |
emh203 | 0:3d9c67d97d6f | 341 | blkCnt = numPoints & 0x3; |
emh203 | 0:3d9c67d97d6f | 342 | |
emh203 | 0:3d9c67d97d6f | 343 | /* Calculate convolution for remaining samples of Bigger length sequence */ |
emh203 | 0:3d9c67d97d6f | 344 | while(blkCnt > 0) |
emh203 | 0:3d9c67d97d6f | 345 | { |
emh203 | 0:3d9c67d97d6f | 346 | /* Initialze temporary scratch pointer as scratch1 */ |
emh203 | 0:3d9c67d97d6f | 347 | pScr1 = pScratch1; |
emh203 | 0:3d9c67d97d6f | 348 | |
emh203 | 0:3d9c67d97d6f | 349 | /* Clear Accumlators */ |
emh203 | 0:3d9c67d97d6f | 350 | acc0 = 0; |
emh203 | 0:3d9c67d97d6f | 351 | |
emh203 | 0:3d9c67d97d6f | 352 | tapCnt = (srcBLen) >> 1u; |
emh203 | 0:3d9c67d97d6f | 353 | |
emh203 | 0:3d9c67d97d6f | 354 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 355 | { |
emh203 | 0:3d9c67d97d6f | 356 | |
emh203 | 0:3d9c67d97d6f | 357 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 358 | x1 = *__SIMD32(pScr1)++; |
emh203 | 0:3d9c67d97d6f | 359 | |
emh203 | 0:3d9c67d97d6f | 360 | /* Read two samples from smaller buffer */ |
emh203 | 0:3d9c67d97d6f | 361 | y1 = *__SIMD32(pIn2)++; |
emh203 | 0:3d9c67d97d6f | 362 | |
emh203 | 0:3d9c67d97d6f | 363 | acc0 = __SMLAD(x1, y1, acc0); |
emh203 | 0:3d9c67d97d6f | 364 | |
emh203 | 0:3d9c67d97d6f | 365 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 366 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 367 | } |
emh203 | 0:3d9c67d97d6f | 368 | |
emh203 | 0:3d9c67d97d6f | 369 | tapCnt = (srcBLen) & 1u; |
emh203 | 0:3d9c67d97d6f | 370 | |
emh203 | 0:3d9c67d97d6f | 371 | /* apply same above for remaining samples of smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 372 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 373 | { |
emh203 | 0:3d9c67d97d6f | 374 | |
emh203 | 0:3d9c67d97d6f | 375 | /* accumlate the results */ |
emh203 | 0:3d9c67d97d6f | 376 | acc0 += (*pScr1++ * *pIn2++); |
emh203 | 0:3d9c67d97d6f | 377 | |
emh203 | 0:3d9c67d97d6f | 378 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 379 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 380 | } |
emh203 | 0:3d9c67d97d6f | 381 | |
emh203 | 0:3d9c67d97d6f | 382 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 383 | |
emh203 | 0:3d9c67d97d6f | 384 | /* The result is in 2.30 format. Convert to 1.15 with saturation. |
emh203 | 0:3d9c67d97d6f | 385 | ** Then store the output in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 386 | *pOut++ = (q15_t) (__SSAT((acc0 >> 15), 16)); |
emh203 | 0:3d9c67d97d6f | 387 | |
emh203 | 0:3d9c67d97d6f | 388 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 389 | pIn2 = py; |
emh203 | 0:3d9c67d97d6f | 390 | |
emh203 | 0:3d9c67d97d6f | 391 | pScratch1 += 1u; |
emh203 | 0:3d9c67d97d6f | 392 | |
emh203 | 0:3d9c67d97d6f | 393 | } |
emh203 | 0:3d9c67d97d6f | 394 | /* set status as ARM_MATH_SUCCESS */ |
emh203 | 0:3d9c67d97d6f | 395 | status = ARM_MATH_SUCCESS; |
emh203 | 0:3d9c67d97d6f | 396 | } |
emh203 | 0:3d9c67d97d6f | 397 | /* Return to application */ |
emh203 | 0:3d9c67d97d6f | 398 | return (status); |
emh203 | 0:3d9c67d97d6f | 399 | } |
emh203 | 0:3d9c67d97d6f | 400 | |
emh203 | 0:3d9c67d97d6f | 401 | #else |
emh203 | 0:3d9c67d97d6f | 402 | |
emh203 | 0:3d9c67d97d6f | 403 | arm_status arm_conv_partial_fast_opt_q15( |
emh203 | 0:3d9c67d97d6f | 404 | q15_t * pSrcA, |
emh203 | 0:3d9c67d97d6f | 405 | uint32_t srcALen, |
emh203 | 0:3d9c67d97d6f | 406 | q15_t * pSrcB, |
emh203 | 0:3d9c67d97d6f | 407 | uint32_t srcBLen, |
emh203 | 0:3d9c67d97d6f | 408 | q15_t * pDst, |
emh203 | 0:3d9c67d97d6f | 409 | uint32_t firstIndex, |
emh203 | 0:3d9c67d97d6f | 410 | uint32_t numPoints, |
emh203 | 0:3d9c67d97d6f | 411 | q15_t * pScratch1, |
emh203 | 0:3d9c67d97d6f | 412 | q15_t * pScratch2) |
emh203 | 0:3d9c67d97d6f | 413 | { |
emh203 | 0:3d9c67d97d6f | 414 | |
emh203 | 0:3d9c67d97d6f | 415 | q15_t *pOut = pDst; /* output pointer */ |
emh203 | 0:3d9c67d97d6f | 416 | q15_t *pScr1 = pScratch1; /* Temporary pointer for scratch1 */ |
emh203 | 0:3d9c67d97d6f | 417 | q15_t *pScr2 = pScratch2; /* Temporary pointer for scratch1 */ |
emh203 | 0:3d9c67d97d6f | 418 | q31_t acc0, acc1, acc2, acc3; /* Accumulator */ |
emh203 | 0:3d9c67d97d6f | 419 | q15_t *pIn1; /* inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 420 | q15_t *pIn2; /* inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 421 | q15_t *px; /* Intermediate inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 422 | q15_t *py; /* Intermediate inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 423 | uint32_t j, k, blkCnt; /* loop counter */ |
emh203 | 0:3d9c67d97d6f | 424 | arm_status status; /* Status variable */ |
emh203 | 0:3d9c67d97d6f | 425 | uint32_t tapCnt; /* loop count */ |
emh203 | 0:3d9c67d97d6f | 426 | q15_t x10, x11, x20, x21; /* Temporary variables to hold srcA buffer */ |
emh203 | 0:3d9c67d97d6f | 427 | q15_t y10, y11; /* Temporary variables to hold srcB buffer */ |
emh203 | 0:3d9c67d97d6f | 428 | |
emh203 | 0:3d9c67d97d6f | 429 | |
emh203 | 0:3d9c67d97d6f | 430 | /* Check for range of output samples to be calculated */ |
emh203 | 0:3d9c67d97d6f | 431 | if((firstIndex + numPoints) > ((srcALen + (srcBLen - 1u)))) |
emh203 | 0:3d9c67d97d6f | 432 | { |
emh203 | 0:3d9c67d97d6f | 433 | /* Set status as ARM_MATH_ARGUMENT_ERROR */ |
emh203 | 0:3d9c67d97d6f | 434 | status = ARM_MATH_ARGUMENT_ERROR; |
emh203 | 0:3d9c67d97d6f | 435 | } |
emh203 | 0:3d9c67d97d6f | 436 | else |
emh203 | 0:3d9c67d97d6f | 437 | { |
emh203 | 0:3d9c67d97d6f | 438 | |
emh203 | 0:3d9c67d97d6f | 439 | /* The algorithm implementation is based on the lengths of the inputs. */ |
emh203 | 0:3d9c67d97d6f | 440 | /* srcB is always made to slide across srcA. */ |
emh203 | 0:3d9c67d97d6f | 441 | /* So srcBLen is always considered as shorter or equal to srcALen */ |
emh203 | 0:3d9c67d97d6f | 442 | if(srcALen >= srcBLen) |
emh203 | 0:3d9c67d97d6f | 443 | { |
emh203 | 0:3d9c67d97d6f | 444 | /* Initialization of inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 445 | pIn1 = pSrcA; |
emh203 | 0:3d9c67d97d6f | 446 | |
emh203 | 0:3d9c67d97d6f | 447 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 448 | pIn2 = pSrcB; |
emh203 | 0:3d9c67d97d6f | 449 | } |
emh203 | 0:3d9c67d97d6f | 450 | else |
emh203 | 0:3d9c67d97d6f | 451 | { |
emh203 | 0:3d9c67d97d6f | 452 | /* Initialization of inputA pointer */ |
emh203 | 0:3d9c67d97d6f | 453 | pIn1 = pSrcB; |
emh203 | 0:3d9c67d97d6f | 454 | |
emh203 | 0:3d9c67d97d6f | 455 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 456 | pIn2 = pSrcA; |
emh203 | 0:3d9c67d97d6f | 457 | |
emh203 | 0:3d9c67d97d6f | 458 | /* srcBLen is always considered as shorter or equal to srcALen */ |
emh203 | 0:3d9c67d97d6f | 459 | j = srcBLen; |
emh203 | 0:3d9c67d97d6f | 460 | srcBLen = srcALen; |
emh203 | 0:3d9c67d97d6f | 461 | srcALen = j; |
emh203 | 0:3d9c67d97d6f | 462 | } |
emh203 | 0:3d9c67d97d6f | 463 | |
emh203 | 0:3d9c67d97d6f | 464 | /* Temporary pointer for scratch2 */ |
emh203 | 0:3d9c67d97d6f | 465 | py = pScratch2; |
emh203 | 0:3d9c67d97d6f | 466 | |
emh203 | 0:3d9c67d97d6f | 467 | /* pointer to take end of scratch2 buffer */ |
emh203 | 0:3d9c67d97d6f | 468 | pScr2 = pScratch2 + srcBLen - 1; |
emh203 | 0:3d9c67d97d6f | 469 | |
emh203 | 0:3d9c67d97d6f | 470 | /* points to smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 471 | px = pIn2; |
emh203 | 0:3d9c67d97d6f | 472 | |
emh203 | 0:3d9c67d97d6f | 473 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
emh203 | 0:3d9c67d97d6f | 474 | k = srcBLen >> 2u; |
emh203 | 0:3d9c67d97d6f | 475 | |
emh203 | 0:3d9c67d97d6f | 476 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
emh203 | 0:3d9c67d97d6f | 477 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 478 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 479 | { |
emh203 | 0:3d9c67d97d6f | 480 | /* copy second buffer in reversal manner */ |
emh203 | 0:3d9c67d97d6f | 481 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 482 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 483 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 484 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 485 | |
emh203 | 0:3d9c67d97d6f | 486 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 487 | k--; |
emh203 | 0:3d9c67d97d6f | 488 | } |
emh203 | 0:3d9c67d97d6f | 489 | |
emh203 | 0:3d9c67d97d6f | 490 | /* If the count is not a multiple of 4, copy remaining samples here. |
emh203 | 0:3d9c67d97d6f | 491 | ** No loop unrolling is used. */ |
emh203 | 0:3d9c67d97d6f | 492 | k = srcBLen % 0x4u; |
emh203 | 0:3d9c67d97d6f | 493 | |
emh203 | 0:3d9c67d97d6f | 494 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 495 | { |
emh203 | 0:3d9c67d97d6f | 496 | /* copy second buffer in reversal manner for remaining samples */ |
emh203 | 0:3d9c67d97d6f | 497 | *pScr2-- = *px++; |
emh203 | 0:3d9c67d97d6f | 498 | |
emh203 | 0:3d9c67d97d6f | 499 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 500 | k--; |
emh203 | 0:3d9c67d97d6f | 501 | } |
emh203 | 0:3d9c67d97d6f | 502 | |
emh203 | 0:3d9c67d97d6f | 503 | /* Initialze temporary scratch pointer */ |
emh203 | 0:3d9c67d97d6f | 504 | pScr1 = pScratch1; |
emh203 | 0:3d9c67d97d6f | 505 | |
emh203 | 0:3d9c67d97d6f | 506 | /* Fill (srcBLen - 1u) zeros in scratch buffer */ |
emh203 | 0:3d9c67d97d6f | 507 | arm_fill_q15(0, pScr1, (srcBLen - 1u)); |
emh203 | 0:3d9c67d97d6f | 508 | |
emh203 | 0:3d9c67d97d6f | 509 | /* Update temporary scratch pointer */ |
emh203 | 0:3d9c67d97d6f | 510 | pScr1 += (srcBLen - 1u); |
emh203 | 0:3d9c67d97d6f | 511 | |
emh203 | 0:3d9c67d97d6f | 512 | /* Copy bigger length sequence(srcALen) samples in scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 513 | |
emh203 | 0:3d9c67d97d6f | 514 | |
emh203 | 0:3d9c67d97d6f | 515 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
emh203 | 0:3d9c67d97d6f | 516 | k = srcALen >> 2u; |
emh203 | 0:3d9c67d97d6f | 517 | |
emh203 | 0:3d9c67d97d6f | 518 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
emh203 | 0:3d9c67d97d6f | 519 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 520 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 521 | { |
emh203 | 0:3d9c67d97d6f | 522 | /* copy second buffer in reversal manner */ |
emh203 | 0:3d9c67d97d6f | 523 | *pScr1++ = *pIn1++; |
emh203 | 0:3d9c67d97d6f | 524 | *pScr1++ = *pIn1++; |
emh203 | 0:3d9c67d97d6f | 525 | *pScr1++ = *pIn1++; |
emh203 | 0:3d9c67d97d6f | 526 | *pScr1++ = *pIn1++; |
emh203 | 0:3d9c67d97d6f | 527 | |
emh203 | 0:3d9c67d97d6f | 528 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 529 | k--; |
emh203 | 0:3d9c67d97d6f | 530 | } |
emh203 | 0:3d9c67d97d6f | 531 | |
emh203 | 0:3d9c67d97d6f | 532 | /* If the count is not a multiple of 4, copy remaining samples here. |
emh203 | 0:3d9c67d97d6f | 533 | ** No loop unrolling is used. */ |
emh203 | 0:3d9c67d97d6f | 534 | k = srcALen % 0x4u; |
emh203 | 0:3d9c67d97d6f | 535 | |
emh203 | 0:3d9c67d97d6f | 536 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 537 | { |
emh203 | 0:3d9c67d97d6f | 538 | /* copy second buffer in reversal manner for remaining samples */ |
emh203 | 0:3d9c67d97d6f | 539 | *pScr1++ = *pIn1++; |
emh203 | 0:3d9c67d97d6f | 540 | |
emh203 | 0:3d9c67d97d6f | 541 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 542 | k--; |
emh203 | 0:3d9c67d97d6f | 543 | } |
emh203 | 0:3d9c67d97d6f | 544 | |
emh203 | 0:3d9c67d97d6f | 545 | |
emh203 | 0:3d9c67d97d6f | 546 | /* Apply loop unrolling and do 4 Copies simultaneously. */ |
emh203 | 0:3d9c67d97d6f | 547 | k = (srcBLen - 1u) >> 2u; |
emh203 | 0:3d9c67d97d6f | 548 | |
emh203 | 0:3d9c67d97d6f | 549 | /* First part of the processing with loop unrolling copies 4 data points at a time. |
emh203 | 0:3d9c67d97d6f | 550 | ** a second loop below copies for the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 551 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 552 | { |
emh203 | 0:3d9c67d97d6f | 553 | /* copy second buffer in reversal manner */ |
emh203 | 0:3d9c67d97d6f | 554 | *pScr1++ = 0; |
emh203 | 0:3d9c67d97d6f | 555 | *pScr1++ = 0; |
emh203 | 0:3d9c67d97d6f | 556 | *pScr1++ = 0; |
emh203 | 0:3d9c67d97d6f | 557 | *pScr1++ = 0; |
emh203 | 0:3d9c67d97d6f | 558 | |
emh203 | 0:3d9c67d97d6f | 559 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 560 | k--; |
emh203 | 0:3d9c67d97d6f | 561 | } |
emh203 | 0:3d9c67d97d6f | 562 | |
emh203 | 0:3d9c67d97d6f | 563 | /* If the count is not a multiple of 4, copy remaining samples here. |
emh203 | 0:3d9c67d97d6f | 564 | ** No loop unrolling is used. */ |
emh203 | 0:3d9c67d97d6f | 565 | k = (srcBLen - 1u) % 0x4u; |
emh203 | 0:3d9c67d97d6f | 566 | |
emh203 | 0:3d9c67d97d6f | 567 | while(k > 0u) |
emh203 | 0:3d9c67d97d6f | 568 | { |
emh203 | 0:3d9c67d97d6f | 569 | /* copy second buffer in reversal manner for remaining samples */ |
emh203 | 0:3d9c67d97d6f | 570 | *pScr1++ = 0; |
emh203 | 0:3d9c67d97d6f | 571 | |
emh203 | 0:3d9c67d97d6f | 572 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 573 | k--; |
emh203 | 0:3d9c67d97d6f | 574 | } |
emh203 | 0:3d9c67d97d6f | 575 | |
emh203 | 0:3d9c67d97d6f | 576 | |
emh203 | 0:3d9c67d97d6f | 577 | /* Initialization of pIn2 pointer */ |
emh203 | 0:3d9c67d97d6f | 578 | pIn2 = py; |
emh203 | 0:3d9c67d97d6f | 579 | |
emh203 | 0:3d9c67d97d6f | 580 | pScratch1 += firstIndex; |
emh203 | 0:3d9c67d97d6f | 581 | |
emh203 | 0:3d9c67d97d6f | 582 | pOut = pDst + firstIndex; |
emh203 | 0:3d9c67d97d6f | 583 | |
emh203 | 0:3d9c67d97d6f | 584 | /* Actual convolution process starts here */ |
emh203 | 0:3d9c67d97d6f | 585 | blkCnt = (numPoints) >> 2; |
emh203 | 0:3d9c67d97d6f | 586 | |
emh203 | 0:3d9c67d97d6f | 587 | while(blkCnt > 0) |
emh203 | 0:3d9c67d97d6f | 588 | { |
emh203 | 0:3d9c67d97d6f | 589 | /* Initialze temporary scratch pointer as scratch1 */ |
emh203 | 0:3d9c67d97d6f | 590 | pScr1 = pScratch1; |
emh203 | 0:3d9c67d97d6f | 591 | |
emh203 | 0:3d9c67d97d6f | 592 | /* Clear Accumlators */ |
emh203 | 0:3d9c67d97d6f | 593 | acc0 = 0; |
emh203 | 0:3d9c67d97d6f | 594 | acc1 = 0; |
emh203 | 0:3d9c67d97d6f | 595 | acc2 = 0; |
emh203 | 0:3d9c67d97d6f | 596 | acc3 = 0; |
emh203 | 0:3d9c67d97d6f | 597 | |
emh203 | 0:3d9c67d97d6f | 598 | /* Read two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 599 | x10 = *pScr1++; |
emh203 | 0:3d9c67d97d6f | 600 | x11 = *pScr1++; |
emh203 | 0:3d9c67d97d6f | 601 | |
emh203 | 0:3d9c67d97d6f | 602 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 603 | x20 = *pScr1++; |
emh203 | 0:3d9c67d97d6f | 604 | x21 = *pScr1++; |
emh203 | 0:3d9c67d97d6f | 605 | |
emh203 | 0:3d9c67d97d6f | 606 | tapCnt = (srcBLen) >> 2u; |
emh203 | 0:3d9c67d97d6f | 607 | |
emh203 | 0:3d9c67d97d6f | 608 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 609 | { |
emh203 | 0:3d9c67d97d6f | 610 | |
emh203 | 0:3d9c67d97d6f | 611 | /* Read two samples from smaller buffer */ |
emh203 | 0:3d9c67d97d6f | 612 | y10 = *pIn2; |
emh203 | 0:3d9c67d97d6f | 613 | y11 = *(pIn2 + 1u); |
emh203 | 0:3d9c67d97d6f | 614 | |
emh203 | 0:3d9c67d97d6f | 615 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 616 | acc0 += (q31_t) x10 *y10; |
emh203 | 0:3d9c67d97d6f | 617 | acc0 += (q31_t) x11 *y11; |
emh203 | 0:3d9c67d97d6f | 618 | acc2 += (q31_t) x20 *y10; |
emh203 | 0:3d9c67d97d6f | 619 | acc2 += (q31_t) x21 *y11; |
emh203 | 0:3d9c67d97d6f | 620 | |
emh203 | 0:3d9c67d97d6f | 621 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 622 | acc1 += (q31_t) x11 *y10; |
emh203 | 0:3d9c67d97d6f | 623 | acc1 += (q31_t) x20 *y11; |
emh203 | 0:3d9c67d97d6f | 624 | |
emh203 | 0:3d9c67d97d6f | 625 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 626 | x10 = *pScr1; |
emh203 | 0:3d9c67d97d6f | 627 | x11 = *(pScr1 + 1u); |
emh203 | 0:3d9c67d97d6f | 628 | |
emh203 | 0:3d9c67d97d6f | 629 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 630 | acc3 += (q31_t) x21 *y10; |
emh203 | 0:3d9c67d97d6f | 631 | acc3 += (q31_t) x10 *y11; |
emh203 | 0:3d9c67d97d6f | 632 | |
emh203 | 0:3d9c67d97d6f | 633 | /* Read next two samples from scratch2 buffer */ |
emh203 | 0:3d9c67d97d6f | 634 | y10 = *(pIn2 + 2u); |
emh203 | 0:3d9c67d97d6f | 635 | y11 = *(pIn2 + 3u); |
emh203 | 0:3d9c67d97d6f | 636 | |
emh203 | 0:3d9c67d97d6f | 637 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 638 | acc0 += (q31_t) x20 *y10; |
emh203 | 0:3d9c67d97d6f | 639 | acc0 += (q31_t) x21 *y11; |
emh203 | 0:3d9c67d97d6f | 640 | acc2 += (q31_t) x10 *y10; |
emh203 | 0:3d9c67d97d6f | 641 | acc2 += (q31_t) x11 *y11; |
emh203 | 0:3d9c67d97d6f | 642 | acc1 += (q31_t) x21 *y10; |
emh203 | 0:3d9c67d97d6f | 643 | acc1 += (q31_t) x10 *y11; |
emh203 | 0:3d9c67d97d6f | 644 | |
emh203 | 0:3d9c67d97d6f | 645 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 646 | x20 = *(pScr1 + 2); |
emh203 | 0:3d9c67d97d6f | 647 | x21 = *(pScr1 + 3); |
emh203 | 0:3d9c67d97d6f | 648 | |
emh203 | 0:3d9c67d97d6f | 649 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 650 | acc3 += (q31_t) x11 *y10; |
emh203 | 0:3d9c67d97d6f | 651 | acc3 += (q31_t) x20 *y11; |
emh203 | 0:3d9c67d97d6f | 652 | |
emh203 | 0:3d9c67d97d6f | 653 | /* update scratch pointers */ |
emh203 | 0:3d9c67d97d6f | 654 | pIn2 += 4u; |
emh203 | 0:3d9c67d97d6f | 655 | pScr1 += 4u; |
emh203 | 0:3d9c67d97d6f | 656 | |
emh203 | 0:3d9c67d97d6f | 657 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 658 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 659 | } |
emh203 | 0:3d9c67d97d6f | 660 | |
emh203 | 0:3d9c67d97d6f | 661 | /* Update scratch pointer for remaining samples of smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 662 | pScr1 -= 4u; |
emh203 | 0:3d9c67d97d6f | 663 | |
emh203 | 0:3d9c67d97d6f | 664 | /* apply same above for remaining samples of smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 665 | tapCnt = (srcBLen) & 3u; |
emh203 | 0:3d9c67d97d6f | 666 | |
emh203 | 0:3d9c67d97d6f | 667 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 668 | { |
emh203 | 0:3d9c67d97d6f | 669 | /* accumlate the results */ |
emh203 | 0:3d9c67d97d6f | 670 | acc0 += (*pScr1++ * *pIn2); |
emh203 | 0:3d9c67d97d6f | 671 | acc1 += (*pScr1++ * *pIn2); |
emh203 | 0:3d9c67d97d6f | 672 | acc2 += (*pScr1++ * *pIn2); |
emh203 | 0:3d9c67d97d6f | 673 | acc3 += (*pScr1++ * *pIn2++); |
emh203 | 0:3d9c67d97d6f | 674 | |
emh203 | 0:3d9c67d97d6f | 675 | pScr1 -= 3u; |
emh203 | 0:3d9c67d97d6f | 676 | |
emh203 | 0:3d9c67d97d6f | 677 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 678 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 679 | } |
emh203 | 0:3d9c67d97d6f | 680 | |
emh203 | 0:3d9c67d97d6f | 681 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 682 | |
emh203 | 0:3d9c67d97d6f | 683 | |
emh203 | 0:3d9c67d97d6f | 684 | /* Store the results in the accumulators in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 685 | *pOut++ = __SSAT((acc0 >> 15), 16); |
emh203 | 0:3d9c67d97d6f | 686 | *pOut++ = __SSAT((acc1 >> 15), 16); |
emh203 | 0:3d9c67d97d6f | 687 | *pOut++ = __SSAT((acc2 >> 15), 16); |
emh203 | 0:3d9c67d97d6f | 688 | *pOut++ = __SSAT((acc3 >> 15), 16); |
emh203 | 0:3d9c67d97d6f | 689 | |
emh203 | 0:3d9c67d97d6f | 690 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 691 | pIn2 = py; |
emh203 | 0:3d9c67d97d6f | 692 | |
emh203 | 0:3d9c67d97d6f | 693 | pScratch1 += 4u; |
emh203 | 0:3d9c67d97d6f | 694 | |
emh203 | 0:3d9c67d97d6f | 695 | } |
emh203 | 0:3d9c67d97d6f | 696 | |
emh203 | 0:3d9c67d97d6f | 697 | |
emh203 | 0:3d9c67d97d6f | 698 | blkCnt = numPoints & 0x3; |
emh203 | 0:3d9c67d97d6f | 699 | |
emh203 | 0:3d9c67d97d6f | 700 | /* Calculate convolution for remaining samples of Bigger length sequence */ |
emh203 | 0:3d9c67d97d6f | 701 | while(blkCnt > 0) |
emh203 | 0:3d9c67d97d6f | 702 | { |
emh203 | 0:3d9c67d97d6f | 703 | /* Initialze temporary scratch pointer as scratch1 */ |
emh203 | 0:3d9c67d97d6f | 704 | pScr1 = pScratch1; |
emh203 | 0:3d9c67d97d6f | 705 | |
emh203 | 0:3d9c67d97d6f | 706 | /* Clear Accumlators */ |
emh203 | 0:3d9c67d97d6f | 707 | acc0 = 0; |
emh203 | 0:3d9c67d97d6f | 708 | |
emh203 | 0:3d9c67d97d6f | 709 | tapCnt = (srcBLen) >> 1u; |
emh203 | 0:3d9c67d97d6f | 710 | |
emh203 | 0:3d9c67d97d6f | 711 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 712 | { |
emh203 | 0:3d9c67d97d6f | 713 | |
emh203 | 0:3d9c67d97d6f | 714 | /* Read next two samples from scratch1 buffer */ |
emh203 | 0:3d9c67d97d6f | 715 | x10 = *pScr1++; |
emh203 | 0:3d9c67d97d6f | 716 | x11 = *pScr1++; |
emh203 | 0:3d9c67d97d6f | 717 | |
emh203 | 0:3d9c67d97d6f | 718 | /* Read two samples from smaller buffer */ |
emh203 | 0:3d9c67d97d6f | 719 | y10 = *pIn2++; |
emh203 | 0:3d9c67d97d6f | 720 | y11 = *pIn2++; |
emh203 | 0:3d9c67d97d6f | 721 | |
emh203 | 0:3d9c67d97d6f | 722 | /* multiply and accumlate */ |
emh203 | 0:3d9c67d97d6f | 723 | acc0 += (q31_t) x10 *y10; |
emh203 | 0:3d9c67d97d6f | 724 | acc0 += (q31_t) x11 *y11; |
emh203 | 0:3d9c67d97d6f | 725 | |
emh203 | 0:3d9c67d97d6f | 726 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 727 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 728 | } |
emh203 | 0:3d9c67d97d6f | 729 | |
emh203 | 0:3d9c67d97d6f | 730 | tapCnt = (srcBLen) & 1u; |
emh203 | 0:3d9c67d97d6f | 731 | |
emh203 | 0:3d9c67d97d6f | 732 | /* apply same above for remaining samples of smaller length sequence */ |
emh203 | 0:3d9c67d97d6f | 733 | while(tapCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 734 | { |
emh203 | 0:3d9c67d97d6f | 735 | |
emh203 | 0:3d9c67d97d6f | 736 | /* accumlate the results */ |
emh203 | 0:3d9c67d97d6f | 737 | acc0 += (*pScr1++ * *pIn2++); |
emh203 | 0:3d9c67d97d6f | 738 | |
emh203 | 0:3d9c67d97d6f | 739 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 740 | tapCnt--; |
emh203 | 0:3d9c67d97d6f | 741 | } |
emh203 | 0:3d9c67d97d6f | 742 | |
emh203 | 0:3d9c67d97d6f | 743 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 744 | |
emh203 | 0:3d9c67d97d6f | 745 | /* Store the result in the accumulator in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 746 | *pOut++ = (q15_t) (__SSAT((acc0 >> 15), 16)); |
emh203 | 0:3d9c67d97d6f | 747 | |
emh203 | 0:3d9c67d97d6f | 748 | /* Initialization of inputB pointer */ |
emh203 | 0:3d9c67d97d6f | 749 | pIn2 = py; |
emh203 | 0:3d9c67d97d6f | 750 | |
emh203 | 0:3d9c67d97d6f | 751 | pScratch1 += 1u; |
emh203 | 0:3d9c67d97d6f | 752 | |
emh203 | 0:3d9c67d97d6f | 753 | } |
emh203 | 0:3d9c67d97d6f | 754 | |
emh203 | 0:3d9c67d97d6f | 755 | /* set status as ARM_MATH_SUCCESS */ |
emh203 | 0:3d9c67d97d6f | 756 | status = ARM_MATH_SUCCESS; |
emh203 | 0:3d9c67d97d6f | 757 | |
emh203 | 0:3d9c67d97d6f | 758 | } |
emh203 | 0:3d9c67d97d6f | 759 | |
emh203 | 0:3d9c67d97d6f | 760 | /* Return to application */ |
emh203 | 0:3d9c67d97d6f | 761 | return (status); |
emh203 | 0:3d9c67d97d6f | 762 | } |
emh203 | 0:3d9c67d97d6f | 763 | |
emh203 | 0:3d9c67d97d6f | 764 | #endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */ |
emh203 | 0:3d9c67d97d6f | 765 | |
emh203 | 0:3d9c67d97d6f | 766 | /** |
emh203 | 0:3d9c67d97d6f | 767 | * @} end of PartialConv group |
emh203 | 0:3d9c67d97d6f | 768 | */ |