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
StatisticsFunctions/arm_min_q31.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_min_q31.c |
emh203 | 0:3d9c67d97d6f | 9 | * |
emh203 | 0:3d9c67d97d6f | 10 | * Description: Minimum value of a Q31 vector. |
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 groupStats |
emh203 | 0:3d9c67d97d6f | 45 | */ |
emh203 | 0:3d9c67d97d6f | 46 | |
emh203 | 0:3d9c67d97d6f | 47 | |
emh203 | 0:3d9c67d97d6f | 48 | /** |
emh203 | 0:3d9c67d97d6f | 49 | * @addtogroup Min |
emh203 | 0:3d9c67d97d6f | 50 | * @{ |
emh203 | 0:3d9c67d97d6f | 51 | */ |
emh203 | 0:3d9c67d97d6f | 52 | |
emh203 | 0:3d9c67d97d6f | 53 | |
emh203 | 0:3d9c67d97d6f | 54 | /** |
emh203 | 0:3d9c67d97d6f | 55 | * @brief Minimum value of a Q31 vector. |
emh203 | 0:3d9c67d97d6f | 56 | * @param[in] *pSrc points to the input vector |
emh203 | 0:3d9c67d97d6f | 57 | * @param[in] blockSize length of the input vector |
emh203 | 0:3d9c67d97d6f | 58 | * @param[out] *pResult minimum value returned here |
emh203 | 0:3d9c67d97d6f | 59 | * @param[out] *pIndex index of minimum value returned here |
emh203 | 0:3d9c67d97d6f | 60 | * @return none. |
emh203 | 0:3d9c67d97d6f | 61 | * |
emh203 | 0:3d9c67d97d6f | 62 | */ |
emh203 | 0:3d9c67d97d6f | 63 | |
emh203 | 0:3d9c67d97d6f | 64 | void arm_min_q31( |
emh203 | 0:3d9c67d97d6f | 65 | q31_t * pSrc, |
emh203 | 0:3d9c67d97d6f | 66 | uint32_t blockSize, |
emh203 | 0:3d9c67d97d6f | 67 | q31_t * pResult, |
emh203 | 0:3d9c67d97d6f | 68 | uint32_t * pIndex) |
emh203 | 0:3d9c67d97d6f | 69 | { |
emh203 | 0:3d9c67d97d6f | 70 | #ifndef ARM_MATH_CM0_FAMILY |
emh203 | 0:3d9c67d97d6f | 71 | |
emh203 | 0:3d9c67d97d6f | 72 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emh203 | 0:3d9c67d97d6f | 73 | q31_t minVal1, minVal2, out; /* Temporary variables to store the output value. */ |
emh203 | 0:3d9c67d97d6f | 74 | uint32_t blkCnt, outIndex, count; /* loop counter */ |
emh203 | 0:3d9c67d97d6f | 75 | |
emh203 | 0:3d9c67d97d6f | 76 | /* Initialise the count value. */ |
emh203 | 0:3d9c67d97d6f | 77 | count = 0u; |
emh203 | 0:3d9c67d97d6f | 78 | /* Initialise the index value to zero. */ |
emh203 | 0:3d9c67d97d6f | 79 | outIndex = 0u; |
emh203 | 0:3d9c67d97d6f | 80 | /* Load first input value that act as reference value for comparision */ |
emh203 | 0:3d9c67d97d6f | 81 | out = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 82 | |
emh203 | 0:3d9c67d97d6f | 83 | |
emh203 | 0:3d9c67d97d6f | 84 | /* Loop unrolling */ |
emh203 | 0:3d9c67d97d6f | 85 | blkCnt = (blockSize - 1u) >> 2u; |
emh203 | 0:3d9c67d97d6f | 86 | |
emh203 | 0:3d9c67d97d6f | 87 | while(blkCnt > 0) |
emh203 | 0:3d9c67d97d6f | 88 | { |
emh203 | 0:3d9c67d97d6f | 89 | /* Initialize minVal to the next consecutive values one by one */ |
emh203 | 0:3d9c67d97d6f | 90 | minVal1 = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 91 | minVal2 = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 92 | |
emh203 | 0:3d9c67d97d6f | 93 | /* compare for the minimum value */ |
emh203 | 0:3d9c67d97d6f | 94 | if(out > minVal1) |
emh203 | 0:3d9c67d97d6f | 95 | { |
emh203 | 0:3d9c67d97d6f | 96 | /* Update the minimum value and its index */ |
emh203 | 0:3d9c67d97d6f | 97 | out = minVal1; |
emh203 | 0:3d9c67d97d6f | 98 | outIndex = count + 1u; |
emh203 | 0:3d9c67d97d6f | 99 | } |
emh203 | 0:3d9c67d97d6f | 100 | |
emh203 | 0:3d9c67d97d6f | 101 | minVal1 = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 102 | |
emh203 | 0:3d9c67d97d6f | 103 | /* compare for the minimum value */ |
emh203 | 0:3d9c67d97d6f | 104 | if(out > minVal2) |
emh203 | 0:3d9c67d97d6f | 105 | { |
emh203 | 0:3d9c67d97d6f | 106 | /* Update the minimum value and its index */ |
emh203 | 0:3d9c67d97d6f | 107 | out = minVal2; |
emh203 | 0:3d9c67d97d6f | 108 | outIndex = count + 2u; |
emh203 | 0:3d9c67d97d6f | 109 | } |
emh203 | 0:3d9c67d97d6f | 110 | |
emh203 | 0:3d9c67d97d6f | 111 | minVal2 = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 112 | |
emh203 | 0:3d9c67d97d6f | 113 | /* compare for the minimum value */ |
emh203 | 0:3d9c67d97d6f | 114 | if(out > minVal1) |
emh203 | 0:3d9c67d97d6f | 115 | { |
emh203 | 0:3d9c67d97d6f | 116 | /* Update the minimum value and its index */ |
emh203 | 0:3d9c67d97d6f | 117 | out = minVal1; |
emh203 | 0:3d9c67d97d6f | 118 | outIndex = count + 3u; |
emh203 | 0:3d9c67d97d6f | 119 | } |
emh203 | 0:3d9c67d97d6f | 120 | |
emh203 | 0:3d9c67d97d6f | 121 | /* compare for the minimum value */ |
emh203 | 0:3d9c67d97d6f | 122 | if(out > minVal2) |
emh203 | 0:3d9c67d97d6f | 123 | { |
emh203 | 0:3d9c67d97d6f | 124 | /* Update the minimum value and its index */ |
emh203 | 0:3d9c67d97d6f | 125 | out = minVal2; |
emh203 | 0:3d9c67d97d6f | 126 | outIndex = count + 4u; |
emh203 | 0:3d9c67d97d6f | 127 | } |
emh203 | 0:3d9c67d97d6f | 128 | |
emh203 | 0:3d9c67d97d6f | 129 | count += 4u; |
emh203 | 0:3d9c67d97d6f | 130 | |
emh203 | 0:3d9c67d97d6f | 131 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 132 | } |
emh203 | 0:3d9c67d97d6f | 133 | |
emh203 | 0:3d9c67d97d6f | 134 | /* if (blockSize - 1u ) is not multiple of 4 */ |
emh203 | 0:3d9c67d97d6f | 135 | blkCnt = (blockSize - 1u) % 4u; |
emh203 | 0:3d9c67d97d6f | 136 | |
emh203 | 0:3d9c67d97d6f | 137 | #else |
emh203 | 0:3d9c67d97d6f | 138 | |
emh203 | 0:3d9c67d97d6f | 139 | /* Run the below code for Cortex-M0 */ |
emh203 | 0:3d9c67d97d6f | 140 | q31_t minVal1, out; /* Temporary variables to store the output value. */ |
emh203 | 0:3d9c67d97d6f | 141 | uint32_t blkCnt, outIndex; /* loop counter */ |
emh203 | 0:3d9c67d97d6f | 142 | |
emh203 | 0:3d9c67d97d6f | 143 | blkCnt = (blockSize - 1u); |
emh203 | 0:3d9c67d97d6f | 144 | |
emh203 | 0:3d9c67d97d6f | 145 | /* Initialise the index value to zero. */ |
emh203 | 0:3d9c67d97d6f | 146 | outIndex = 0u; |
emh203 | 0:3d9c67d97d6f | 147 | /* Load first input value that act as reference value for comparision */ |
emh203 | 0:3d9c67d97d6f | 148 | out = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 149 | |
emh203 | 0:3d9c67d97d6f | 150 | #endif // #ifndef ARM_MATH_CM0_FAMILY |
emh203 | 0:3d9c67d97d6f | 151 | |
emh203 | 0:3d9c67d97d6f | 152 | while(blkCnt > 0) |
emh203 | 0:3d9c67d97d6f | 153 | { |
emh203 | 0:3d9c67d97d6f | 154 | /* Initialize minVal to the next consecutive values one by one */ |
emh203 | 0:3d9c67d97d6f | 155 | minVal1 = *pSrc++; |
emh203 | 0:3d9c67d97d6f | 156 | |
emh203 | 0:3d9c67d97d6f | 157 | /* compare for the minimum value */ |
emh203 | 0:3d9c67d97d6f | 158 | if(out > minVal1) |
emh203 | 0:3d9c67d97d6f | 159 | { |
emh203 | 0:3d9c67d97d6f | 160 | /* Update the minimum value and it's index */ |
emh203 | 0:3d9c67d97d6f | 161 | out = minVal1; |
emh203 | 0:3d9c67d97d6f | 162 | outIndex = blockSize - blkCnt; |
emh203 | 0:3d9c67d97d6f | 163 | } |
emh203 | 0:3d9c67d97d6f | 164 | |
emh203 | 0:3d9c67d97d6f | 165 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 166 | |
emh203 | 0:3d9c67d97d6f | 167 | } |
emh203 | 0:3d9c67d97d6f | 168 | |
emh203 | 0:3d9c67d97d6f | 169 | /* Store the minimum value and its index into destination pointers */ |
emh203 | 0:3d9c67d97d6f | 170 | *pResult = out; |
emh203 | 0:3d9c67d97d6f | 171 | *pIndex = outIndex; |
emh203 | 0:3d9c67d97d6f | 172 | } |
emh203 | 0:3d9c67d97d6f | 173 | |
emh203 | 0:3d9c67d97d6f | 174 | /** |
emh203 | 0:3d9c67d97d6f | 175 | * @} end of Min group |
emh203 | 0:3d9c67d97d6f | 176 | */ |