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
ComplexMathFunctions/arm_cmplx_mag_f32.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_cmplx_mag_f32.c |
emh203 | 0:3d9c67d97d6f | 9 | * |
emh203 | 0:3d9c67d97d6f | 10 | * Description: Floating-point complex magnitude. |
emh203 | 0:3d9c67d97d6f | 11 | * |
emh203 | 0:3d9c67d97d6f | 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
emh203 | 0:3d9c67d97d6f | 13 | * |
emh203 | 0:3d9c67d97d6f | 14 | * Redistribution and use in source and binary forms, with or without |
emh203 | 0:3d9c67d97d6f | 15 | * modification, are permitted provided that the following conditions |
emh203 | 0:3d9c67d97d6f | 16 | * are met: |
emh203 | 0:3d9c67d97d6f | 17 | * - Redistributions of source code must retain the above copyright |
emh203 | 0:3d9c67d97d6f | 18 | * notice, this list of conditions and the following disclaimer. |
emh203 | 0:3d9c67d97d6f | 19 | * - Redistributions in binary form must reproduce the above copyright |
emh203 | 0:3d9c67d97d6f | 20 | * notice, this list of conditions and the following disclaimer in |
emh203 | 0:3d9c67d97d6f | 21 | * the documentation and/or other materials provided with the |
emh203 | 0:3d9c67d97d6f | 22 | * distribution. |
emh203 | 0:3d9c67d97d6f | 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
emh203 | 0:3d9c67d97d6f | 24 | * may be used to endorse or promote products derived from this |
emh203 | 0:3d9c67d97d6f | 25 | * software without specific prior written permission. |
emh203 | 0:3d9c67d97d6f | 26 | * |
emh203 | 0:3d9c67d97d6f | 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
emh203 | 0:3d9c67d97d6f | 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
emh203 | 0:3d9c67d97d6f | 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
emh203 | 0:3d9c67d97d6f | 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
emh203 | 0:3d9c67d97d6f | 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
emh203 | 0:3d9c67d97d6f | 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
emh203 | 0:3d9c67d97d6f | 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
emh203 | 0:3d9c67d97d6f | 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
emh203 | 0:3d9c67d97d6f | 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
emh203 | 0:3d9c67d97d6f | 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
emh203 | 0:3d9c67d97d6f | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
emh203 | 0:3d9c67d97d6f | 38 | * POSSIBILITY OF SUCH DAMAGE. |
emh203 | 0:3d9c67d97d6f | 39 | * ---------------------------------------------------------------------------- */ |
emh203 | 0:3d9c67d97d6f | 40 | |
emh203 | 0:3d9c67d97d6f | 41 | #include "arm_math.h" |
emh203 | 0:3d9c67d97d6f | 42 | |
emh203 | 0:3d9c67d97d6f | 43 | /** |
emh203 | 0:3d9c67d97d6f | 44 | * @ingroup groupCmplxMath |
emh203 | 0:3d9c67d97d6f | 45 | */ |
emh203 | 0:3d9c67d97d6f | 46 | |
emh203 | 0:3d9c67d97d6f | 47 | /** |
emh203 | 0:3d9c67d97d6f | 48 | * @defgroup cmplx_mag Complex Magnitude |
emh203 | 0:3d9c67d97d6f | 49 | * |
emh203 | 0:3d9c67d97d6f | 50 | * Computes the magnitude of the elements of a complex data vector. |
emh203 | 0:3d9c67d97d6f | 51 | * |
emh203 | 0:3d9c67d97d6f | 52 | * The <code>pSrc</code> points to the source data and |
emh203 | 0:3d9c67d97d6f | 53 | * <code>pDst</code> points to the where the result should be written. |
emh203 | 0:3d9c67d97d6f | 54 | * <code>numSamples</code> specifies the number of complex samples |
emh203 | 0:3d9c67d97d6f | 55 | * in the input array and the data is stored in an interleaved fashion |
emh203 | 0:3d9c67d97d6f | 56 | * (real, imag, real, imag, ...). |
emh203 | 0:3d9c67d97d6f | 57 | * The input array has a total of <code>2*numSamples</code> values; |
emh203 | 0:3d9c67d97d6f | 58 | * the output array has a total of <code>numSamples</code> values. |
emh203 | 0:3d9c67d97d6f | 59 | * The underlying algorithm is used: |
emh203 | 0:3d9c67d97d6f | 60 | * |
emh203 | 0:3d9c67d97d6f | 61 | * <pre> |
emh203 | 0:3d9c67d97d6f | 62 | * for(n=0; n<numSamples; n++) { |
emh203 | 0:3d9c67d97d6f | 63 | * pDst[n] = sqrt(pSrc[(2*n)+0]^2 + pSrc[(2*n)+1]^2); |
emh203 | 0:3d9c67d97d6f | 64 | * } |
emh203 | 0:3d9c67d97d6f | 65 | * </pre> |
emh203 | 0:3d9c67d97d6f | 66 | * |
emh203 | 0:3d9c67d97d6f | 67 | * There are separate functions for floating-point, Q15, and Q31 data types. |
emh203 | 0:3d9c67d97d6f | 68 | */ |
emh203 | 0:3d9c67d97d6f | 69 | |
emh203 | 0:3d9c67d97d6f | 70 | /** |
emh203 | 0:3d9c67d97d6f | 71 | * @addtogroup cmplx_mag |
emh203 | 0:3d9c67d97d6f | 72 | * @{ |
emh203 | 0:3d9c67d97d6f | 73 | */ |
emh203 | 0:3d9c67d97d6f | 74 | /** |
emh203 | 0:3d9c67d97d6f | 75 | * @brief Floating-point complex magnitude. |
emh203 | 0:3d9c67d97d6f | 76 | * @param[in] *pSrc points to complex input buffer |
emh203 | 0:3d9c67d97d6f | 77 | * @param[out] *pDst points to real output buffer |
emh203 | 0:3d9c67d97d6f | 78 | * @param[in] numSamples number of complex samples in the input vector |
emh203 | 0:3d9c67d97d6f | 79 | * @return none. |
emh203 | 0:3d9c67d97d6f | 80 | * |
emh203 | 0:3d9c67d97d6f | 81 | */ |
emh203 | 0:3d9c67d97d6f | 82 | |
emh203 | 0:3d9c67d97d6f | 83 | |
emh203 | 0:3d9c67d97d6f | 84 | void arm_cmplx_mag_f32( |
emh203 | 0:3d9c67d97d6f | 85 | float32_t * pSrc, |
emh203 | 0:3d9c67d97d6f | 86 | float32_t * pDst, |
emh203 | 0:3d9c67d97d6f | 87 | uint32_t numSamples) |
emh203 | 0:3d9c67d97d6f | 88 | { |
emh203 | 0:3d9c67d97d6f | 89 | float32_t realIn, imagIn; /* Temporary variables to hold input values */ |
emh203 | 0:3d9c67d97d6f | 90 | |
emh203 | 0:3d9c67d97d6f | 91 | #ifndef ARM_MATH_CM0_FAMILY |
emh203 | 0:3d9c67d97d6f | 92 | |
emh203 | 0:3d9c67d97d6f | 93 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emh203 | 0:3d9c67d97d6f | 94 | uint32_t blkCnt; /* loop counter */ |
emh203 | 0:3d9c67d97d6f | 95 | |
emh203 | 0:3d9c67d97d6f | 96 | /*loop Unrolling */ |
emh203 | 0:3d9c67d97d6f | 97 | blkCnt = numSamples >> 2u; |
emh203 | 0:3d9c67d97d6f | 98 | |
emh203 | 0:3d9c67d97d6f | 99 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
emh203 | 0:3d9c67d97d6f | 100 | ** a second loop below computes the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 101 | while(blkCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 102 | { |
emh203 | 0:3d9c67d97d6f | 103 | |
emh203 | 0:3d9c67d97d6f | 104 | /* C[0] = sqrt(A[0] * A[0] + A[1] * A[1]) */ |
emh203 | 0:3d9c67d97d6f | 105 | realIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 106 | imagIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 107 | /* store the result in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 108 | arm_sqrt_f32((realIn * realIn) + (imagIn * imagIn), pDst++); |
emh203 | 0:3d9c67d97d6f | 109 | |
emh203 | 0:3d9c67d97d6f | 110 | realIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 111 | imagIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 112 | arm_sqrt_f32((realIn * realIn) + (imagIn * imagIn), pDst++); |
emh203 | 0:3d9c67d97d6f | 113 | |
emh203 | 0:3d9c67d97d6f | 114 | realIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 115 | imagIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 116 | arm_sqrt_f32((realIn * realIn) + (imagIn * imagIn), pDst++); |
emh203 | 0:3d9c67d97d6f | 117 | |
emh203 | 0:3d9c67d97d6f | 118 | realIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 119 | imagIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 120 | arm_sqrt_f32((realIn * realIn) + (imagIn * imagIn), pDst++); |
emh203 | 0:3d9c67d97d6f | 121 | |
emh203 | 0:3d9c67d97d6f | 122 | |
emh203 | 0:3d9c67d97d6f | 123 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 124 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 125 | } |
emh203 | 0:3d9c67d97d6f | 126 | |
emh203 | 0:3d9c67d97d6f | 127 | /* If the numSamples is not a multiple of 4, compute any remaining output samples here. |
emh203 | 0:3d9c67d97d6f | 128 | ** No loop unrolling is used. */ |
emh203 | 0:3d9c67d97d6f | 129 | blkCnt = numSamples % 0x4u; |
emh203 | 0:3d9c67d97d6f | 130 | |
emh203 | 0:3d9c67d97d6f | 131 | while(blkCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 132 | { |
emh203 | 0:3d9c67d97d6f | 133 | /* C[0] = sqrt(A[0] * A[0] + A[1] * A[1]) */ |
emh203 | 0:3d9c67d97d6f | 134 | realIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 135 | imagIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 136 | /* store the result in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 137 | arm_sqrt_f32((realIn * realIn) + (imagIn * imagIn), pDst++); |
emh203 | 0:3d9c67d97d6f | 138 | |
emh203 | 0:3d9c67d97d6f | 139 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 140 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 141 | } |
emh203 | 0:3d9c67d97d6f | 142 | |
emh203 | 0:3d9c67d97d6f | 143 | #else |
emh203 | 0:3d9c67d97d6f | 144 | |
emh203 | 0:3d9c67d97d6f | 145 | /* Run the below code for Cortex-M0 */ |
emh203 | 0:3d9c67d97d6f | 146 | |
emh203 | 0:3d9c67d97d6f | 147 | while(numSamples > 0u) |
emh203 | 0:3d9c67d97d6f | 148 | { |
emh203 | 0:3d9c67d97d6f | 149 | /* out = sqrt((real * real) + (imag * imag)) */ |
emh203 | 0:3d9c67d97d6f | 150 | realIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 151 | imagIn = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 152 | /* store the result in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 153 | arm_sqrt_f32((realIn * realIn) + (imagIn * imagIn), pDst++); |
emh203 | 0:3d9c67d97d6f | 154 | |
emh203 | 0:3d9c67d97d6f | 155 | /* Decrement the loop counter */ |
emh203 | 0:3d9c67d97d6f | 156 | numSamples--; |
emh203 | 0:3d9c67d97d6f | 157 | } |
emh203 | 0:3d9c67d97d6f | 158 | |
emh203 | 0:3d9c67d97d6f | 159 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
emh203 | 0:3d9c67d97d6f | 160 | |
emh203 | 0:3d9c67d97d6f | 161 | } |
emh203 | 0:3d9c67d97d6f | 162 | |
emh203 | 0:3d9c67d97d6f | 163 | /** |
emh203 | 0:3d9c67d97d6f | 164 | * @} end of cmplx_mag group |
emh203 | 0:3d9c67d97d6f | 165 | */ |