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CMSIS DSP library

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cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_cmplx_q31.c@2:da51fb522205, 2013-05-30 (annotated)

Committer:
emilmont
Date:
Thu May 30 17:10:11 2013 +0100
Revision:
2:da51fb522205
Parent:
1:fdd22bb7aa52
Child:
3:7a284390b0ce
Keep "cmsis-dsp" module in synch with its source

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:fdd22bb7aa52 1 /* ----------------------------------------------------------------------
emilmont 1:fdd22bb7aa52 2 * Copyright (C) 2010 ARM Limited. All rights reserved.
emilmont 1:fdd22bb7aa52 3 *
emilmont 1:fdd22bb7aa52 4 * $Date: 15. February 2012
emilmont 2:da51fb522205 5 * $Revision: V1.1.0
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 *
emilmont 1:fdd22bb7aa52 14 * Version 1.1.0 2012/02/15
emilmont 1:fdd22bb7aa52 15 * Updated with more optimizations, bug fixes and minor API changes.
emilmont 1:fdd22bb7aa52 16 *
emilmont 1:fdd22bb7aa52 17 * Version 1.0.10 2011/7/15
emilmont 1:fdd22bb7aa52 18 * Big Endian support added and Merged M0 and M3/M4 Source code.
emilmont 1:fdd22bb7aa52 19 *
emilmont 1:fdd22bb7aa52 20 * Version 1.0.3 2010/11/29
emilmont 1:fdd22bb7aa52 21 * Re-organized the CMSIS folders and updated documentation.
emilmont 1:fdd22bb7aa52 22 *
emilmont 1:fdd22bb7aa52 23 * Version 1.0.2 2010/11/11
emilmont 1:fdd22bb7aa52 24 * Documentation updated.
emilmont 1:fdd22bb7aa52 25 *
emilmont 1:fdd22bb7aa52 26 * Version 1.0.1 2010/10/05
emilmont 1:fdd22bb7aa52 27 * Production release and review comments incorporated.
emilmont 1:fdd22bb7aa52 28 *
emilmont 1:fdd22bb7aa52 29 * Version 1.0.0 2010/09/20
emilmont 1:fdd22bb7aa52 30 * Production release and review comments incorporated.
emilmont 1:fdd22bb7aa52 31 * -------------------------------------------------------------------- */
emilmont 1:fdd22bb7aa52 32
emilmont 1:fdd22bb7aa52 33 #include "arm_math.h"
emilmont 1:fdd22bb7aa52 34
emilmont 1:fdd22bb7aa52 35 /**
emilmont 1:fdd22bb7aa52 36 * @ingroup groupCmplxMath
emilmont 1:fdd22bb7aa52 37 */
emilmont 1:fdd22bb7aa52 38
emilmont 1:fdd22bb7aa52 39 /**
emilmont 1:fdd22bb7aa52 40 * @addtogroup CmplxByCmplxMult
emilmont 1:fdd22bb7aa52 41 * @{
emilmont 1:fdd22bb7aa52 42 */
emilmont 1:fdd22bb7aa52 43
emilmont 1:fdd22bb7aa52 44
emilmont 1:fdd22bb7aa52 45 /**
emilmont 1:fdd22bb7aa52 46 * @brief Q31 complex-by-complex multiplication
emilmont 1:fdd22bb7aa52 47 * @param[in] *pSrcA points to the first input vector
emilmont 1:fdd22bb7aa52 48 * @param[in] *pSrcB points to the second input vector
emilmont 1:fdd22bb7aa52 49 * @param[out] *pDst points to the output vector
emilmont 1:fdd22bb7aa52 50 * @param[in] numSamples number of complex samples in each vector
emilmont 1:fdd22bb7aa52 51 * @return none.
emilmont 1:fdd22bb7aa52 52 *
emilmont 1:fdd22bb7aa52 53 * <b>Scaling and Overflow Behavior:</b>
emilmont 1:fdd22bb7aa52 54 * \par
emilmont 1:fdd22bb7aa52 55 * The function implements 1.31 by 1.31 multiplications and finally output is converted into 3.29 format.
emilmont 1:fdd22bb7aa52 56 * Input down scaling is not required.
emilmont 1:fdd22bb7aa52 57 */
emilmont 1:fdd22bb7aa52 58
emilmont 1:fdd22bb7aa52 59 void arm_cmplx_mult_cmplx_q31(
emilmont 1:fdd22bb7aa52 60 q31_t * pSrcA,
emilmont 1:fdd22bb7aa52 61 q31_t * pSrcB,
emilmont 1:fdd22bb7aa52 62 q31_t * pDst,
emilmont 1:fdd22bb7aa52 63 uint32_t numSamples)
emilmont 1:fdd22bb7aa52 64 {
emilmont 1:fdd22bb7aa52 65 q31_t a, b, c, d; /* Temporary variables to store real and imaginary values */
emilmont 1:fdd22bb7aa52 66 uint32_t blkCnt; /* loop counters */
emilmont 1:fdd22bb7aa52 67 q31_t mul1, mul2, mul3, mul4;
emilmont 1:fdd22bb7aa52 68 q31_t out1, out2;
emilmont 1:fdd22bb7aa52 69
emilmont 1:fdd22bb7aa52 70 #ifndef ARM_MATH_CM0
emilmont 1:fdd22bb7aa52 71
emilmont 1:fdd22bb7aa52 72 /* Run the below code for Cortex-M4 and Cortex-M3 */
emilmont 1:fdd22bb7aa52 73
emilmont 1:fdd22bb7aa52 74 /* loop Unrolling */
emilmont 1:fdd22bb7aa52 75 blkCnt = numSamples >> 2u;
emilmont 1:fdd22bb7aa52 76
emilmont 1:fdd22bb7aa52 77 /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
emilmont 1:fdd22bb7aa52 78 ** a second loop below computes the remaining 1 to 3 samples. */
emilmont 1:fdd22bb7aa52 79 while(blkCnt > 0u)
emilmont 1:fdd22bb7aa52 80 {
emilmont 1:fdd22bb7aa52 81 /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
emilmont 1:fdd22bb7aa52 82 /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
emilmont 1:fdd22bb7aa52 83 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 84 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 85 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 86 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 87
emilmont 1:fdd22bb7aa52 88 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 89 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 90 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 91 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 92
emilmont 1:fdd22bb7aa52 93 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 94 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 95 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 96 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 97
emilmont 1:fdd22bb7aa52 98 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 99 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 100
emilmont 1:fdd22bb7aa52 101 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 102 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 103 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 104 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 105
emilmont 1:fdd22bb7aa52 106 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 107 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 108 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 109 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 110
emilmont 1:fdd22bb7aa52 111 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 112 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 113 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 114 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 115
emilmont 1:fdd22bb7aa52 116 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 117 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 118 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 119 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 120
emilmont 1:fdd22bb7aa52 121 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 122 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 123
emilmont 1:fdd22bb7aa52 124 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 125 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 126 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 127 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 128
emilmont 1:fdd22bb7aa52 129 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 130 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 131 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 132 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 133
emilmont 1:fdd22bb7aa52 134 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 135 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 136 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 137 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 138
emilmont 1:fdd22bb7aa52 139 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 140 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 141 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 142 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 143
emilmont 1:fdd22bb7aa52 144 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 145 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 146
emilmont 1:fdd22bb7aa52 147 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 148 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 149 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 150 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 151
emilmont 1:fdd22bb7aa52 152 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 153 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 154 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 155 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 156
emilmont 1:fdd22bb7aa52 157 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 158 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 159 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 160 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 161
emilmont 1:fdd22bb7aa52 162 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 163 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 164 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 165 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 166
emilmont 1:fdd22bb7aa52 167 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 168 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 169
emilmont 1:fdd22bb7aa52 170 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 171 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 172 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 173 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 174
emilmont 1:fdd22bb7aa52 175 /* Decrement the blockSize loop counter */
emilmont 1:fdd22bb7aa52 176 blkCnt--;
emilmont 1:fdd22bb7aa52 177 }
emilmont 1:fdd22bb7aa52 178
emilmont 1:fdd22bb7aa52 179 /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
emilmont 1:fdd22bb7aa52 180 ** No loop unrolling is used. */
emilmont 1:fdd22bb7aa52 181 blkCnt = numSamples % 0x4u;
emilmont 1:fdd22bb7aa52 182
emilmont 1:fdd22bb7aa52 183 while(blkCnt > 0u)
emilmont 1:fdd22bb7aa52 184 {
emilmont 1:fdd22bb7aa52 185 /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
emilmont 1:fdd22bb7aa52 186 /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
emilmont 1:fdd22bb7aa52 187 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 188 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 189 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 190 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 191
emilmont 1:fdd22bb7aa52 192 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 193 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 194 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 195 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 196
emilmont 1:fdd22bb7aa52 197 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 198 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 199 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 200 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 201
emilmont 1:fdd22bb7aa52 202 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 203 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 204
emilmont 1:fdd22bb7aa52 205 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 206 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 207 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 208 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 209
emilmont 1:fdd22bb7aa52 210 /* Decrement the blockSize loop counter */
emilmont 1:fdd22bb7aa52 211 blkCnt--;
emilmont 1:fdd22bb7aa52 212 }
emilmont 1:fdd22bb7aa52 213
emilmont 1:fdd22bb7aa52 214 #else
emilmont 1:fdd22bb7aa52 215
emilmont 1:fdd22bb7aa52 216 /* Run the below code for Cortex-M0 */
emilmont 1:fdd22bb7aa52 217
emilmont 1:fdd22bb7aa52 218 /* loop Unrolling */
emilmont 1:fdd22bb7aa52 219 blkCnt = numSamples >> 1u;
emilmont 1:fdd22bb7aa52 220
emilmont 1:fdd22bb7aa52 221 /* First part of the processing with loop unrolling. Compute 2 outputs at a time.
emilmont 1:fdd22bb7aa52 222 ** a second loop below computes the remaining 1 sample. */
emilmont 1:fdd22bb7aa52 223 while(blkCnt > 0u)
emilmont 1:fdd22bb7aa52 224 {
emilmont 1:fdd22bb7aa52 225 /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
emilmont 1:fdd22bb7aa52 226 /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
emilmont 1:fdd22bb7aa52 227 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 228 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 229 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 230 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 231
emilmont 1:fdd22bb7aa52 232 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 233 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 234 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 235 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 236
emilmont 1:fdd22bb7aa52 237 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 238 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 239 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 240 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 241
emilmont 1:fdd22bb7aa52 242 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 243 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 244
emilmont 1:fdd22bb7aa52 245 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 246 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 247 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 248 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 249
emilmont 1:fdd22bb7aa52 250 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 251 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 252 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 253 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 254
emilmont 1:fdd22bb7aa52 255 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 256 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 257 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 258 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 259
emilmont 1:fdd22bb7aa52 260 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 261 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 262 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 263 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 264
emilmont 1:fdd22bb7aa52 265 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 266 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 267
emilmont 1:fdd22bb7aa52 268 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 269 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 270 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 271 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 272
emilmont 1:fdd22bb7aa52 273 /* Decrement the blockSize loop counter */
emilmont 1:fdd22bb7aa52 274 blkCnt--;
emilmont 1:fdd22bb7aa52 275 }
emilmont 1:fdd22bb7aa52 276
emilmont 1:fdd22bb7aa52 277 /* If the blockSize is not a multiple of 2, compute any remaining output samples here.
emilmont 1:fdd22bb7aa52 278 ** No loop unrolling is used. */
emilmont 1:fdd22bb7aa52 279 blkCnt = numSamples % 0x2u;
emilmont 1:fdd22bb7aa52 280
emilmont 1:fdd22bb7aa52 281 while(blkCnt > 0u)
emilmont 1:fdd22bb7aa52 282 {
emilmont 1:fdd22bb7aa52 283 /* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
emilmont 1:fdd22bb7aa52 284 /* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
emilmont 1:fdd22bb7aa52 285 a = *pSrcA++;
emilmont 1:fdd22bb7aa52 286 b = *pSrcA++;
emilmont 1:fdd22bb7aa52 287 c = *pSrcB++;
emilmont 1:fdd22bb7aa52 288 d = *pSrcB++;
emilmont 1:fdd22bb7aa52 289
emilmont 1:fdd22bb7aa52 290 mul1 = (q31_t) (((q63_t) a * c) >> 32);
emilmont 1:fdd22bb7aa52 291 mul2 = (q31_t) (((q63_t) b * d) >> 32);
emilmont 1:fdd22bb7aa52 292 mul3 = (q31_t) (((q63_t) a * d) >> 32);
emilmont 1:fdd22bb7aa52 293 mul4 = (q31_t) (((q63_t) b * c) >> 32);
emilmont 1:fdd22bb7aa52 294
emilmont 1:fdd22bb7aa52 295 mul1 = (mul1 >> 1);
emilmont 1:fdd22bb7aa52 296 mul2 = (mul2 >> 1);
emilmont 1:fdd22bb7aa52 297 mul3 = (mul3 >> 1);
emilmont 1:fdd22bb7aa52 298 mul4 = (mul4 >> 1);
emilmont 1:fdd22bb7aa52 299
emilmont 1:fdd22bb7aa52 300 out1 = mul1 - mul2;
emilmont 1:fdd22bb7aa52 301 out2 = mul3 + mul4;
emilmont 1:fdd22bb7aa52 302
emilmont 1:fdd22bb7aa52 303 /* store the real result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 304 *pDst++ = out1;
emilmont 1:fdd22bb7aa52 305 /* store the imag result in 3.29 format in the destination buffer. */
emilmont 1:fdd22bb7aa52 306 *pDst++ = out2;
emilmont 1:fdd22bb7aa52 307
emilmont 1:fdd22bb7aa52 308 /* Decrement the blockSize loop counter */
emilmont 1:fdd22bb7aa52 309 blkCnt--;
emilmont 1:fdd22bb7aa52 310 }
emilmont 1:fdd22bb7aa52 311
emilmont 1:fdd22bb7aa52 312 #endif /* #ifndef ARM_MATH_CM0 */
emilmont 1:fdd22bb7aa52 313
emilmont 1:fdd22bb7aa52 314 }
emilmont 1:fdd22bb7aa52 315
emilmont 1:fdd22bb7aa52 316 /**
emilmont 1:fdd22bb7aa52 317 * @} end of CmplxByCmplxMult group
emilmont 1:fdd22bb7aa52 318 */