mbed-os 6.10 versione
cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_cmplx_q31.c@5:ed60e5c5c2a8, 2021-06-21 (annotated)
- Committer:
- michelericcio
- Date:
- Mon Jun 21 10:16:02 2021 +0000
- Revision:
- 5:ed60e5c5c2a8
- Parent:
- 3:7a284390b0ce
mbed-dsp working on ST Nucleo F767ZI and mbed-OS 6
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:fdd22bb7aa52 | 1 | /* ---------------------------------------------------------------------- |
mbed_official | 3:7a284390b0ce | 2 | * Copyright (C) 2010-2013 ARM Limited. All rights reserved. |
emilmont | 1:fdd22bb7aa52 | 3 | * |
mbed_official | 3:7a284390b0ce | 4 | * $Date: 17. January 2013 |
mbed_official | 3:7a284390b0ce | 5 | * $Revision: V1.4.1 |
emilmont | 1:fdd22bb7aa52 | 6 | * |
emilmont | 2:da51fb522205 | 7 | * Project: CMSIS DSP Library |
emilmont | 2:da51fb522205 | 8 | * Title: arm_cmplx_mult_cmplx_q31.c |
emilmont | 1:fdd22bb7aa52 | 9 | * |
emilmont | 2:da51fb522205 | 10 | * Description: Q31 complex-by-complex multiplication |
emilmont | 1:fdd22bb7aa52 | 11 | * |
emilmont | 1:fdd22bb7aa52 | 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
emilmont | 1:fdd22bb7aa52 | 13 | * |
mbed_official | 3:7a284390b0ce | 14 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 3:7a284390b0ce | 15 | * modification, are permitted provided that the following conditions |
mbed_official | 3:7a284390b0ce | 16 | * are met: |
mbed_official | 3:7a284390b0ce | 17 | * - Redistributions of source code must retain the above copyright |
mbed_official | 3:7a284390b0ce | 18 | * notice, this list of conditions and the following disclaimer. |
mbed_official | 3:7a284390b0ce | 19 | * - Redistributions in binary form must reproduce the above copyright |
mbed_official | 3:7a284390b0ce | 20 | * notice, this list of conditions and the following disclaimer in |
mbed_official | 3:7a284390b0ce | 21 | * the documentation and/or other materials provided with the |
mbed_official | 3:7a284390b0ce | 22 | * distribution. |
mbed_official | 3:7a284390b0ce | 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
mbed_official | 3:7a284390b0ce | 24 | * may be used to endorse or promote products derived from this |
mbed_official | 3:7a284390b0ce | 25 | * software without specific prior written permission. |
mbed_official | 3:7a284390b0ce | 26 | * |
mbed_official | 3:7a284390b0ce | 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
mbed_official | 3:7a284390b0ce | 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
mbed_official | 3:7a284390b0ce | 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
mbed_official | 3:7a284390b0ce | 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
mbed_official | 3:7a284390b0ce | 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
mbed_official | 3:7a284390b0ce | 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
mbed_official | 3:7a284390b0ce | 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
mbed_official | 3:7a284390b0ce | 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 3:7a284390b0ce | 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
mbed_official | 3:7a284390b0ce | 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
mbed_official | 3:7a284390b0ce | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
mbed_official | 3:7a284390b0ce | 38 | * POSSIBILITY OF SUCH DAMAGE. |
emilmont | 1:fdd22bb7aa52 | 39 | * -------------------------------------------------------------------- */ |
emilmont | 1:fdd22bb7aa52 | 40 | |
emilmont | 1:fdd22bb7aa52 | 41 | #include "arm_math.h" |
emilmont | 1:fdd22bb7aa52 | 42 | |
emilmont | 1:fdd22bb7aa52 | 43 | /** |
emilmont | 1:fdd22bb7aa52 | 44 | * @ingroup groupCmplxMath |
emilmont | 1:fdd22bb7aa52 | 45 | */ |
emilmont | 1:fdd22bb7aa52 | 46 | |
emilmont | 1:fdd22bb7aa52 | 47 | /** |
emilmont | 1:fdd22bb7aa52 | 48 | * @addtogroup CmplxByCmplxMult |
emilmont | 1:fdd22bb7aa52 | 49 | * @{ |
emilmont | 1:fdd22bb7aa52 | 50 | */ |
emilmont | 1:fdd22bb7aa52 | 51 | |
emilmont | 1:fdd22bb7aa52 | 52 | |
emilmont | 1:fdd22bb7aa52 | 53 | /** |
emilmont | 1:fdd22bb7aa52 | 54 | * @brief Q31 complex-by-complex multiplication |
emilmont | 1:fdd22bb7aa52 | 55 | * @param[in] *pSrcA points to the first input vector |
emilmont | 1:fdd22bb7aa52 | 56 | * @param[in] *pSrcB points to the second input vector |
emilmont | 1:fdd22bb7aa52 | 57 | * @param[out] *pDst points to the output vector |
emilmont | 1:fdd22bb7aa52 | 58 | * @param[in] numSamples number of complex samples in each vector |
emilmont | 1:fdd22bb7aa52 | 59 | * @return none. |
emilmont | 1:fdd22bb7aa52 | 60 | * |
emilmont | 1:fdd22bb7aa52 | 61 | * <b>Scaling and Overflow Behavior:</b> |
emilmont | 1:fdd22bb7aa52 | 62 | * \par |
emilmont | 1:fdd22bb7aa52 | 63 | * The function implements 1.31 by 1.31 multiplications and finally output is converted into 3.29 format. |
emilmont | 1:fdd22bb7aa52 | 64 | * Input down scaling is not required. |
emilmont | 1:fdd22bb7aa52 | 65 | */ |
emilmont | 1:fdd22bb7aa52 | 66 | |
emilmont | 1:fdd22bb7aa52 | 67 | void arm_cmplx_mult_cmplx_q31( |
emilmont | 1:fdd22bb7aa52 | 68 | q31_t * pSrcA, |
emilmont | 1:fdd22bb7aa52 | 69 | q31_t * pSrcB, |
emilmont | 1:fdd22bb7aa52 | 70 | q31_t * pDst, |
emilmont | 1:fdd22bb7aa52 | 71 | uint32_t numSamples) |
emilmont | 1:fdd22bb7aa52 | 72 | { |
emilmont | 1:fdd22bb7aa52 | 73 | q31_t a, b, c, d; /* Temporary variables to store real and imaginary values */ |
emilmont | 1:fdd22bb7aa52 | 74 | uint32_t blkCnt; /* loop counters */ |
emilmont | 1:fdd22bb7aa52 | 75 | q31_t mul1, mul2, mul3, mul4; |
emilmont | 1:fdd22bb7aa52 | 76 | q31_t out1, out2; |
emilmont | 1:fdd22bb7aa52 | 77 | |
mbed_official | 3:7a284390b0ce | 78 | #ifndef ARM_MATH_CM0_FAMILY |
emilmont | 1:fdd22bb7aa52 | 79 | |
emilmont | 1:fdd22bb7aa52 | 80 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emilmont | 1:fdd22bb7aa52 | 81 | |
emilmont | 1:fdd22bb7aa52 | 82 | /* loop Unrolling */ |
emilmont | 1:fdd22bb7aa52 | 83 | blkCnt = numSamples >> 2u; |
emilmont | 1:fdd22bb7aa52 | 84 | |
emilmont | 1:fdd22bb7aa52 | 85 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
emilmont | 1:fdd22bb7aa52 | 86 | ** a second loop below computes the remaining 1 to 3 samples. */ |
emilmont | 1:fdd22bb7aa52 | 87 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 88 | { |
emilmont | 1:fdd22bb7aa52 | 89 | /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */ |
emilmont | 1:fdd22bb7aa52 | 90 | /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */ |
emilmont | 1:fdd22bb7aa52 | 91 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 92 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 93 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 94 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 95 | |
emilmont | 1:fdd22bb7aa52 | 96 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 97 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 98 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 99 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 100 | |
emilmont | 1:fdd22bb7aa52 | 101 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 102 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 103 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 104 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 105 | |
emilmont | 1:fdd22bb7aa52 | 106 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 107 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 108 | |
emilmont | 1:fdd22bb7aa52 | 109 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 110 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 111 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 112 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 113 | |
emilmont | 1:fdd22bb7aa52 | 114 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 115 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 116 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 117 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 118 | |
emilmont | 1:fdd22bb7aa52 | 119 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 120 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 121 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 122 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 123 | |
emilmont | 1:fdd22bb7aa52 | 124 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 125 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 126 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 127 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 128 | |
emilmont | 1:fdd22bb7aa52 | 129 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 130 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 131 | |
emilmont | 1:fdd22bb7aa52 | 132 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 133 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 134 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 135 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 136 | |
emilmont | 1:fdd22bb7aa52 | 137 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 138 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 139 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 140 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 141 | |
emilmont | 1:fdd22bb7aa52 | 142 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 143 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 144 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 145 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 146 | |
emilmont | 1:fdd22bb7aa52 | 147 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 148 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 149 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 150 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 151 | |
emilmont | 1:fdd22bb7aa52 | 152 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 153 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 154 | |
emilmont | 1:fdd22bb7aa52 | 155 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 156 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 157 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 158 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 159 | |
emilmont | 1:fdd22bb7aa52 | 160 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 161 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 162 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 163 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 164 | |
emilmont | 1:fdd22bb7aa52 | 165 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 166 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 167 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 168 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 169 | |
emilmont | 1:fdd22bb7aa52 | 170 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 171 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 172 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 173 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 174 | |
emilmont | 1:fdd22bb7aa52 | 175 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 176 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 177 | |
emilmont | 1:fdd22bb7aa52 | 178 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 179 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 180 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 181 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 182 | |
emilmont | 1:fdd22bb7aa52 | 183 | /* Decrement the blockSize loop counter */ |
emilmont | 1:fdd22bb7aa52 | 184 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 185 | } |
emilmont | 1:fdd22bb7aa52 | 186 | |
emilmont | 1:fdd22bb7aa52 | 187 | /* If the blockSize is not a multiple of 4, compute any remaining output samples here. |
emilmont | 1:fdd22bb7aa52 | 188 | ** No loop unrolling is used. */ |
emilmont | 1:fdd22bb7aa52 | 189 | blkCnt = numSamples % 0x4u; |
emilmont | 1:fdd22bb7aa52 | 190 | |
emilmont | 1:fdd22bb7aa52 | 191 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 192 | { |
emilmont | 1:fdd22bb7aa52 | 193 | /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */ |
emilmont | 1:fdd22bb7aa52 | 194 | /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */ |
emilmont | 1:fdd22bb7aa52 | 195 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 196 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 197 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 198 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 199 | |
emilmont | 1:fdd22bb7aa52 | 200 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 201 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 202 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 203 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 204 | |
emilmont | 1:fdd22bb7aa52 | 205 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 206 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 207 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 208 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 209 | |
emilmont | 1:fdd22bb7aa52 | 210 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 211 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 212 | |
emilmont | 1:fdd22bb7aa52 | 213 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 214 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 215 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 216 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 217 | |
emilmont | 1:fdd22bb7aa52 | 218 | /* Decrement the blockSize loop counter */ |
emilmont | 1:fdd22bb7aa52 | 219 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 220 | } |
emilmont | 1:fdd22bb7aa52 | 221 | |
emilmont | 1:fdd22bb7aa52 | 222 | #else |
emilmont | 1:fdd22bb7aa52 | 223 | |
emilmont | 1:fdd22bb7aa52 | 224 | /* Run the below code for Cortex-M0 */ |
emilmont | 1:fdd22bb7aa52 | 225 | |
emilmont | 1:fdd22bb7aa52 | 226 | /* loop Unrolling */ |
emilmont | 1:fdd22bb7aa52 | 227 | blkCnt = numSamples >> 1u; |
emilmont | 1:fdd22bb7aa52 | 228 | |
emilmont | 1:fdd22bb7aa52 | 229 | /* First part of the processing with loop unrolling. Compute 2 outputs at a time. |
emilmont | 1:fdd22bb7aa52 | 230 | ** a second loop below computes the remaining 1 sample. */ |
emilmont | 1:fdd22bb7aa52 | 231 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 232 | { |
emilmont | 1:fdd22bb7aa52 | 233 | /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */ |
emilmont | 1:fdd22bb7aa52 | 234 | /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */ |
emilmont | 1:fdd22bb7aa52 | 235 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 236 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 237 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 238 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 239 | |
emilmont | 1:fdd22bb7aa52 | 240 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 241 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 242 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 243 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 244 | |
emilmont | 1:fdd22bb7aa52 | 245 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 246 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 247 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 248 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 249 | |
emilmont | 1:fdd22bb7aa52 | 250 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 251 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 252 | |
emilmont | 1:fdd22bb7aa52 | 253 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 254 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 255 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 256 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 257 | |
emilmont | 1:fdd22bb7aa52 | 258 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 259 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 260 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 261 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 262 | |
emilmont | 1:fdd22bb7aa52 | 263 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 264 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 265 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 266 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 267 | |
emilmont | 1:fdd22bb7aa52 | 268 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 269 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 270 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 271 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 272 | |
emilmont | 1:fdd22bb7aa52 | 273 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 274 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 275 | |
emilmont | 1:fdd22bb7aa52 | 276 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 277 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 278 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 279 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 280 | |
emilmont | 1:fdd22bb7aa52 | 281 | /* Decrement the blockSize loop counter */ |
emilmont | 1:fdd22bb7aa52 | 282 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 283 | } |
emilmont | 1:fdd22bb7aa52 | 284 | |
emilmont | 1:fdd22bb7aa52 | 285 | /* If the blockSize is not a multiple of 2, compute any remaining output samples here. |
emilmont | 1:fdd22bb7aa52 | 286 | ** No loop unrolling is used. */ |
emilmont | 1:fdd22bb7aa52 | 287 | blkCnt = numSamples % 0x2u; |
emilmont | 1:fdd22bb7aa52 | 288 | |
emilmont | 1:fdd22bb7aa52 | 289 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 290 | { |
emilmont | 1:fdd22bb7aa52 | 291 | /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */ |
emilmont | 1:fdd22bb7aa52 | 292 | /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */ |
emilmont | 1:fdd22bb7aa52 | 293 | a = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 294 | b = *pSrcA++; |
emilmont | 1:fdd22bb7aa52 | 295 | c = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 296 | d = *pSrcB++; |
emilmont | 1:fdd22bb7aa52 | 297 | |
emilmont | 1:fdd22bb7aa52 | 298 | mul1 = (q31_t) (((q63_t) a * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 299 | mul2 = (q31_t) (((q63_t) b * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 300 | mul3 = (q31_t) (((q63_t) a * d) >> 32); |
emilmont | 1:fdd22bb7aa52 | 301 | mul4 = (q31_t) (((q63_t) b * c) >> 32); |
emilmont | 1:fdd22bb7aa52 | 302 | |
emilmont | 1:fdd22bb7aa52 | 303 | mul1 = (mul1 >> 1); |
emilmont | 1:fdd22bb7aa52 | 304 | mul2 = (mul2 >> 1); |
emilmont | 1:fdd22bb7aa52 | 305 | mul3 = (mul3 >> 1); |
emilmont | 1:fdd22bb7aa52 | 306 | mul4 = (mul4 >> 1); |
emilmont | 1:fdd22bb7aa52 | 307 | |
emilmont | 1:fdd22bb7aa52 | 308 | out1 = mul1 - mul2; |
emilmont | 1:fdd22bb7aa52 | 309 | out2 = mul3 + mul4; |
emilmont | 1:fdd22bb7aa52 | 310 | |
emilmont | 1:fdd22bb7aa52 | 311 | /* store the real result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 312 | *pDst++ = out1; |
emilmont | 1:fdd22bb7aa52 | 313 | /* store the imag result in 3.29 format in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 314 | *pDst++ = out2; |
emilmont | 1:fdd22bb7aa52 | 315 | |
emilmont | 1:fdd22bb7aa52 | 316 | /* Decrement the blockSize loop counter */ |
emilmont | 1:fdd22bb7aa52 | 317 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 318 | } |
emilmont | 1:fdd22bb7aa52 | 319 | |
mbed_official | 3:7a284390b0ce | 320 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
emilmont | 1:fdd22bb7aa52 | 321 | |
emilmont | 1:fdd22bb7aa52 | 322 | } |
emilmont | 1:fdd22bb7aa52 | 323 | |
emilmont | 1:fdd22bb7aa52 | 324 | /** |
emilmont | 1:fdd22bb7aa52 | 325 | * @} end of CmplxByCmplxMult group |
emilmont | 1:fdd22bb7aa52 | 326 | */ |