mbed-os 6.10 versione
cmsis_dsp/ComplexMathFunctions/arm_cmplx_mult_real_f32.c@1:fdd22bb7aa52, 2012-11-28 (annotated)
- Committer:
- emilmont
- Date:
- Wed Nov 28 12:30:09 2012 +0000
- Revision:
- 1:fdd22bb7aa52
- Child:
- 2:da51fb522205
DSP library code
Who changed what in which revision?
User | Revision | Line number | New 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 | 1:fdd22bb7aa52 | 5 | * $Revision: V1.1.0 |
emilmont | 1:fdd22bb7aa52 | 6 | * |
emilmont | 1:fdd22bb7aa52 | 7 | * Project: CMSIS DSP Library |
emilmont | 1:fdd22bb7aa52 | 8 | * Title: arm_cmplx_mult_real_f32.c |
emilmont | 1:fdd22bb7aa52 | 9 | * |
emilmont | 1:fdd22bb7aa52 | 10 | * Description: Floating-point complex by real 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 | * @defgroup CmplxByRealMult Complex-by-Real Multiplication |
emilmont | 1:fdd22bb7aa52 | 41 | * |
emilmont | 1:fdd22bb7aa52 | 42 | * Multiplies a complex vector by a real vector and generates a complex result. |
emilmont | 1:fdd22bb7aa52 | 43 | * The data in the complex arrays is stored in an interleaved fashion |
emilmont | 1:fdd22bb7aa52 | 44 | * (real, imag, real, imag, ...). |
emilmont | 1:fdd22bb7aa52 | 45 | * The parameter <code>numSamples</code> represents the number of complex |
emilmont | 1:fdd22bb7aa52 | 46 | * samples processed. The complex arrays have a total of <code>2*numSamples</code> |
emilmont | 1:fdd22bb7aa52 | 47 | * real values while the real array has a total of <code>numSamples</code> |
emilmont | 1:fdd22bb7aa52 | 48 | * real values. |
emilmont | 1:fdd22bb7aa52 | 49 | * |
emilmont | 1:fdd22bb7aa52 | 50 | * The underlying algorithm is used: |
emilmont | 1:fdd22bb7aa52 | 51 | * |
emilmont | 1:fdd22bb7aa52 | 52 | * <pre> |
emilmont | 1:fdd22bb7aa52 | 53 | * for(n=0; n<numSamples; n++) { |
emilmont | 1:fdd22bb7aa52 | 54 | * pCmplxDst[(2*n)+0] = pSrcCmplx[(2*n)+0] * pSrcReal[n]; |
emilmont | 1:fdd22bb7aa52 | 55 | * pCmplxDst[(2*n)+1] = pSrcCmplx[(2*n)+1] * pSrcReal[n]; |
emilmont | 1:fdd22bb7aa52 | 56 | * } |
emilmont | 1:fdd22bb7aa52 | 57 | * </pre> |
emilmont | 1:fdd22bb7aa52 | 58 | * |
emilmont | 1:fdd22bb7aa52 | 59 | * There are separate functions for floating-point, Q15, and Q31 data types. |
emilmont | 1:fdd22bb7aa52 | 60 | */ |
emilmont | 1:fdd22bb7aa52 | 61 | |
emilmont | 1:fdd22bb7aa52 | 62 | /** |
emilmont | 1:fdd22bb7aa52 | 63 | * @addtogroup CmplxByRealMult |
emilmont | 1:fdd22bb7aa52 | 64 | * @{ |
emilmont | 1:fdd22bb7aa52 | 65 | */ |
emilmont | 1:fdd22bb7aa52 | 66 | |
emilmont | 1:fdd22bb7aa52 | 67 | |
emilmont | 1:fdd22bb7aa52 | 68 | /** |
emilmont | 1:fdd22bb7aa52 | 69 | * @brief Floating-point complex-by-real multiplication |
emilmont | 1:fdd22bb7aa52 | 70 | * @param[in] *pSrcCmplx points to the complex input vector |
emilmont | 1:fdd22bb7aa52 | 71 | * @param[in] *pSrcReal points to the real input vector |
emilmont | 1:fdd22bb7aa52 | 72 | * @param[out] *pCmplxDst points to the complex output vector |
emilmont | 1:fdd22bb7aa52 | 73 | * @param[in] numSamples number of samples in each vector |
emilmont | 1:fdd22bb7aa52 | 74 | * @return none. |
emilmont | 1:fdd22bb7aa52 | 75 | */ |
emilmont | 1:fdd22bb7aa52 | 76 | |
emilmont | 1:fdd22bb7aa52 | 77 | void arm_cmplx_mult_real_f32( |
emilmont | 1:fdd22bb7aa52 | 78 | float32_t * pSrcCmplx, |
emilmont | 1:fdd22bb7aa52 | 79 | float32_t * pSrcReal, |
emilmont | 1:fdd22bb7aa52 | 80 | float32_t * pCmplxDst, |
emilmont | 1:fdd22bb7aa52 | 81 | uint32_t numSamples) |
emilmont | 1:fdd22bb7aa52 | 82 | { |
emilmont | 1:fdd22bb7aa52 | 83 | float32_t in; /* Temporary variable to store input value */ |
emilmont | 1:fdd22bb7aa52 | 84 | uint32_t blkCnt; /* loop counters */ |
emilmont | 1:fdd22bb7aa52 | 85 | |
emilmont | 1:fdd22bb7aa52 | 86 | #ifndef ARM_MATH_CM0 |
emilmont | 1:fdd22bb7aa52 | 87 | |
emilmont | 1:fdd22bb7aa52 | 88 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emilmont | 1:fdd22bb7aa52 | 89 | float32_t inA1, inA2, inA3, inA4; /* Temporary variables to hold input data */ |
emilmont | 1:fdd22bb7aa52 | 90 | float32_t inA5, inA6, inA7, inA8; /* Temporary variables to hold input data */ |
emilmont | 1:fdd22bb7aa52 | 91 | float32_t inB1, inB2, inB3, inB4; /* Temporary variables to hold input data */ |
emilmont | 1:fdd22bb7aa52 | 92 | float32_t out1, out2, out3, out4; /* Temporary variables to hold output data */ |
emilmont | 1:fdd22bb7aa52 | 93 | float32_t out5, out6, out7, out8; /* Temporary variables to hold output data */ |
emilmont | 1:fdd22bb7aa52 | 94 | |
emilmont | 1:fdd22bb7aa52 | 95 | /* loop Unrolling */ |
emilmont | 1:fdd22bb7aa52 | 96 | blkCnt = numSamples >> 2u; |
emilmont | 1:fdd22bb7aa52 | 97 | |
emilmont | 1:fdd22bb7aa52 | 98 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
emilmont | 1:fdd22bb7aa52 | 99 | ** a second loop below computes the remaining 1 to 3 samples. */ |
emilmont | 1:fdd22bb7aa52 | 100 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 101 | { |
emilmont | 1:fdd22bb7aa52 | 102 | /* C[2 * i] = A[2 * i] * B[i]. */ |
emilmont | 1:fdd22bb7aa52 | 103 | /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */ |
emilmont | 1:fdd22bb7aa52 | 104 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 105 | inA1 = pSrcCmplx[0]; |
emilmont | 1:fdd22bb7aa52 | 106 | inA2 = pSrcCmplx[1]; |
emilmont | 1:fdd22bb7aa52 | 107 | /* read input from real input buffer */ |
emilmont | 1:fdd22bb7aa52 | 108 | inB1 = pSrcReal[0]; |
emilmont | 1:fdd22bb7aa52 | 109 | |
emilmont | 1:fdd22bb7aa52 | 110 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 111 | inA3 = pSrcCmplx[2]; |
emilmont | 1:fdd22bb7aa52 | 112 | |
emilmont | 1:fdd22bb7aa52 | 113 | /* multiply complex buffer real input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 114 | out1 = inA1 * inB1; |
emilmont | 1:fdd22bb7aa52 | 115 | |
emilmont | 1:fdd22bb7aa52 | 116 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 117 | inA4 = pSrcCmplx[3]; |
emilmont | 1:fdd22bb7aa52 | 118 | |
emilmont | 1:fdd22bb7aa52 | 119 | /* multiply complex buffer imaginary input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 120 | out2 = inA2 * inB1; |
emilmont | 1:fdd22bb7aa52 | 121 | |
emilmont | 1:fdd22bb7aa52 | 122 | /* read input from real input buffer */ |
emilmont | 1:fdd22bb7aa52 | 123 | inB2 = pSrcReal[1]; |
emilmont | 1:fdd22bb7aa52 | 124 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 125 | inA5 = pSrcCmplx[4]; |
emilmont | 1:fdd22bb7aa52 | 126 | |
emilmont | 1:fdd22bb7aa52 | 127 | /* multiply complex buffer real input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 128 | out3 = inA3 * inB2; |
emilmont | 1:fdd22bb7aa52 | 129 | |
emilmont | 1:fdd22bb7aa52 | 130 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 131 | inA6 = pSrcCmplx[5]; |
emilmont | 1:fdd22bb7aa52 | 132 | /* read input from real input buffer */ |
emilmont | 1:fdd22bb7aa52 | 133 | inB3 = pSrcReal[2]; |
emilmont | 1:fdd22bb7aa52 | 134 | |
emilmont | 1:fdd22bb7aa52 | 135 | /* multiply complex buffer imaginary input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 136 | out4 = inA4 * inB2; |
emilmont | 1:fdd22bb7aa52 | 137 | |
emilmont | 1:fdd22bb7aa52 | 138 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 139 | inA7 = pSrcCmplx[6]; |
emilmont | 1:fdd22bb7aa52 | 140 | |
emilmont | 1:fdd22bb7aa52 | 141 | /* multiply complex buffer real input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 142 | out5 = inA5 * inB3; |
emilmont | 1:fdd22bb7aa52 | 143 | |
emilmont | 1:fdd22bb7aa52 | 144 | /* read input from complex input buffer */ |
emilmont | 1:fdd22bb7aa52 | 145 | inA8 = pSrcCmplx[7]; |
emilmont | 1:fdd22bb7aa52 | 146 | |
emilmont | 1:fdd22bb7aa52 | 147 | /* multiply complex buffer imaginary input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 148 | out6 = inA6 * inB3; |
emilmont | 1:fdd22bb7aa52 | 149 | |
emilmont | 1:fdd22bb7aa52 | 150 | /* read input from real input buffer */ |
emilmont | 1:fdd22bb7aa52 | 151 | inB4 = pSrcReal[3]; |
emilmont | 1:fdd22bb7aa52 | 152 | |
emilmont | 1:fdd22bb7aa52 | 153 | /* store result to destination bufer */ |
emilmont | 1:fdd22bb7aa52 | 154 | pCmplxDst[0] = out1; |
emilmont | 1:fdd22bb7aa52 | 155 | |
emilmont | 1:fdd22bb7aa52 | 156 | /* multiply complex buffer real input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 157 | out7 = inA7 * inB4; |
emilmont | 1:fdd22bb7aa52 | 158 | |
emilmont | 1:fdd22bb7aa52 | 159 | /* store result to destination bufer */ |
emilmont | 1:fdd22bb7aa52 | 160 | pCmplxDst[1] = out2; |
emilmont | 1:fdd22bb7aa52 | 161 | |
emilmont | 1:fdd22bb7aa52 | 162 | /* multiply complex buffer imaginary input with real buffer input */ |
emilmont | 1:fdd22bb7aa52 | 163 | out8 = inA8 * inB4; |
emilmont | 1:fdd22bb7aa52 | 164 | |
emilmont | 1:fdd22bb7aa52 | 165 | /* store result to destination bufer */ |
emilmont | 1:fdd22bb7aa52 | 166 | pCmplxDst[2] = out3; |
emilmont | 1:fdd22bb7aa52 | 167 | pCmplxDst[3] = out4; |
emilmont | 1:fdd22bb7aa52 | 168 | pCmplxDst[4] = out5; |
emilmont | 1:fdd22bb7aa52 | 169 | |
emilmont | 1:fdd22bb7aa52 | 170 | /* incremnet complex input buffer by 8 to process next samples */ |
emilmont | 1:fdd22bb7aa52 | 171 | pSrcCmplx += 8u; |
emilmont | 1:fdd22bb7aa52 | 172 | |
emilmont | 1:fdd22bb7aa52 | 173 | /* store result to destination bufer */ |
emilmont | 1:fdd22bb7aa52 | 174 | pCmplxDst[5] = out6; |
emilmont | 1:fdd22bb7aa52 | 175 | |
emilmont | 1:fdd22bb7aa52 | 176 | /* increment real input buffer by 4 to process next samples */ |
emilmont | 1:fdd22bb7aa52 | 177 | pSrcReal += 4u; |
emilmont | 1:fdd22bb7aa52 | 178 | |
emilmont | 1:fdd22bb7aa52 | 179 | /* store result to destination bufer */ |
emilmont | 1:fdd22bb7aa52 | 180 | pCmplxDst[6] = out7; |
emilmont | 1:fdd22bb7aa52 | 181 | pCmplxDst[7] = out8; |
emilmont | 1:fdd22bb7aa52 | 182 | |
emilmont | 1:fdd22bb7aa52 | 183 | /* increment destination buffer by 8 to process next sampels */ |
emilmont | 1:fdd22bb7aa52 | 184 | pCmplxDst += 8u; |
emilmont | 1:fdd22bb7aa52 | 185 | |
emilmont | 1:fdd22bb7aa52 | 186 | /* Decrement the numSamples loop counter */ |
emilmont | 1:fdd22bb7aa52 | 187 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 188 | } |
emilmont | 1:fdd22bb7aa52 | 189 | |
emilmont | 1:fdd22bb7aa52 | 190 | /* If the numSamples is not a multiple of 4, compute any remaining output samples here. |
emilmont | 1:fdd22bb7aa52 | 191 | ** No loop unrolling is used. */ |
emilmont | 1:fdd22bb7aa52 | 192 | blkCnt = numSamples % 0x4u; |
emilmont | 1:fdd22bb7aa52 | 193 | |
emilmont | 1:fdd22bb7aa52 | 194 | #else |
emilmont | 1:fdd22bb7aa52 | 195 | |
emilmont | 1:fdd22bb7aa52 | 196 | /* Run the below code for Cortex-M0 */ |
emilmont | 1:fdd22bb7aa52 | 197 | blkCnt = numSamples; |
emilmont | 1:fdd22bb7aa52 | 198 | |
emilmont | 1:fdd22bb7aa52 | 199 | #endif /* #ifndef ARM_MATH_CM0 */ |
emilmont | 1:fdd22bb7aa52 | 200 | |
emilmont | 1:fdd22bb7aa52 | 201 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 202 | { |
emilmont | 1:fdd22bb7aa52 | 203 | /* C[2 * i] = A[2 * i] * B[i]. */ |
emilmont | 1:fdd22bb7aa52 | 204 | /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */ |
emilmont | 1:fdd22bb7aa52 | 205 | in = *pSrcReal++; |
emilmont | 1:fdd22bb7aa52 | 206 | /* store the result in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 207 | *pCmplxDst++ = (*pSrcCmplx++) * (in); |
emilmont | 1:fdd22bb7aa52 | 208 | *pCmplxDst++ = (*pSrcCmplx++) * (in); |
emilmont | 1:fdd22bb7aa52 | 209 | |
emilmont | 1:fdd22bb7aa52 | 210 | /* Decrement the numSamples loop counter */ |
emilmont | 1:fdd22bb7aa52 | 211 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 212 | } |
emilmont | 1:fdd22bb7aa52 | 213 | } |
emilmont | 1:fdd22bb7aa52 | 214 | |
emilmont | 1:fdd22bb7aa52 | 215 | /** |
emilmont | 1:fdd22bb7aa52 | 216 | * @} end of CmplxByRealMult group |
emilmont | 1:fdd22bb7aa52 | 217 | */ |