Aded CMSIS5 DSP and NN folder. Needs some work
DSP/source/StatisticsFunctions/arm_min_f32.c@0:eedb7d567a5d, 2018-04-12 (annotated)
- Committer:
- robert_lp
- Date:
- Thu Apr 12 01:31:58 2018 +0000
- Revision:
- 0:eedb7d567a5d
CMSIS5 Library
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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robert_lp | 0:eedb7d567a5d | 1 | /* ---------------------------------------------------------------------- |
robert_lp | 0:eedb7d567a5d | 2 | * Project: CMSIS DSP Library |
robert_lp | 0:eedb7d567a5d | 3 | * Title: arm_min_f32.c |
robert_lp | 0:eedb7d567a5d | 4 | * Description: Minimum value of a floating-point vector |
robert_lp | 0:eedb7d567a5d | 5 | * |
robert_lp | 0:eedb7d567a5d | 6 | * $Date: 27. January 2017 |
robert_lp | 0:eedb7d567a5d | 7 | * $Revision: V.1.5.1 |
robert_lp | 0:eedb7d567a5d | 8 | * |
robert_lp | 0:eedb7d567a5d | 9 | * Target Processor: Cortex-M cores |
robert_lp | 0:eedb7d567a5d | 10 | * -------------------------------------------------------------------- */ |
robert_lp | 0:eedb7d567a5d | 11 | /* |
robert_lp | 0:eedb7d567a5d | 12 | * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. |
robert_lp | 0:eedb7d567a5d | 13 | * |
robert_lp | 0:eedb7d567a5d | 14 | * SPDX-License-Identifier: Apache-2.0 |
robert_lp | 0:eedb7d567a5d | 15 | * |
robert_lp | 0:eedb7d567a5d | 16 | * Licensed under the Apache License, Version 2.0 (the License); you may |
robert_lp | 0:eedb7d567a5d | 17 | * not use this file except in compliance with the License. |
robert_lp | 0:eedb7d567a5d | 18 | * You may obtain a copy of the License at |
robert_lp | 0:eedb7d567a5d | 19 | * |
robert_lp | 0:eedb7d567a5d | 20 | * www.apache.org/licenses/LICENSE-2.0 |
robert_lp | 0:eedb7d567a5d | 21 | * |
robert_lp | 0:eedb7d567a5d | 22 | * Unless required by applicable law or agreed to in writing, software |
robert_lp | 0:eedb7d567a5d | 23 | * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
robert_lp | 0:eedb7d567a5d | 24 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
robert_lp | 0:eedb7d567a5d | 25 | * See the License for the specific language governing permissions and |
robert_lp | 0:eedb7d567a5d | 26 | * limitations under the License. |
robert_lp | 0:eedb7d567a5d | 27 | */ |
robert_lp | 0:eedb7d567a5d | 28 | |
robert_lp | 0:eedb7d567a5d | 29 | #include "arm_math.h" |
robert_lp | 0:eedb7d567a5d | 30 | |
robert_lp | 0:eedb7d567a5d | 31 | /** |
robert_lp | 0:eedb7d567a5d | 32 | * @ingroup groupStats |
robert_lp | 0:eedb7d567a5d | 33 | */ |
robert_lp | 0:eedb7d567a5d | 34 | |
robert_lp | 0:eedb7d567a5d | 35 | /** |
robert_lp | 0:eedb7d567a5d | 36 | * @defgroup Min Minimum |
robert_lp | 0:eedb7d567a5d | 37 | * |
robert_lp | 0:eedb7d567a5d | 38 | * Computes the minimum value of an array of data. |
robert_lp | 0:eedb7d567a5d | 39 | * The function returns both the minimum value and its position within the array. |
robert_lp | 0:eedb7d567a5d | 40 | * There are separate functions for floating-point, Q31, Q15, and Q7 data types. |
robert_lp | 0:eedb7d567a5d | 41 | */ |
robert_lp | 0:eedb7d567a5d | 42 | |
robert_lp | 0:eedb7d567a5d | 43 | /** |
robert_lp | 0:eedb7d567a5d | 44 | * @addtogroup Min |
robert_lp | 0:eedb7d567a5d | 45 | * @{ |
robert_lp | 0:eedb7d567a5d | 46 | */ |
robert_lp | 0:eedb7d567a5d | 47 | |
robert_lp | 0:eedb7d567a5d | 48 | |
robert_lp | 0:eedb7d567a5d | 49 | /** |
robert_lp | 0:eedb7d567a5d | 50 | * @brief Minimum value of a floating-point vector. |
robert_lp | 0:eedb7d567a5d | 51 | * @param[in] *pSrc points to the input vector |
robert_lp | 0:eedb7d567a5d | 52 | * @param[in] blockSize length of the input vector |
robert_lp | 0:eedb7d567a5d | 53 | * @param[out] *pResult minimum value returned here |
robert_lp | 0:eedb7d567a5d | 54 | * @param[out] *pIndex index of minimum value returned here |
robert_lp | 0:eedb7d567a5d | 55 | * @return none. |
robert_lp | 0:eedb7d567a5d | 56 | */ |
robert_lp | 0:eedb7d567a5d | 57 | |
robert_lp | 0:eedb7d567a5d | 58 | void arm_min_f32( |
robert_lp | 0:eedb7d567a5d | 59 | float32_t * pSrc, |
robert_lp | 0:eedb7d567a5d | 60 | uint32_t blockSize, |
robert_lp | 0:eedb7d567a5d | 61 | float32_t * pResult, |
robert_lp | 0:eedb7d567a5d | 62 | uint32_t * pIndex) |
robert_lp | 0:eedb7d567a5d | 63 | { |
robert_lp | 0:eedb7d567a5d | 64 | #if defined (ARM_MATH_DSP) |
robert_lp | 0:eedb7d567a5d | 65 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
robert_lp | 0:eedb7d567a5d | 66 | |
robert_lp | 0:eedb7d567a5d | 67 | float32_t minVal1, minVal2, out; /* Temporary variables to store the output value. */ |
robert_lp | 0:eedb7d567a5d | 68 | uint32_t blkCnt, outIndex, count; /* loop counter */ |
robert_lp | 0:eedb7d567a5d | 69 | |
robert_lp | 0:eedb7d567a5d | 70 | /* Initialise the count value. */ |
robert_lp | 0:eedb7d567a5d | 71 | count = 0U; |
robert_lp | 0:eedb7d567a5d | 72 | /* Initialise the index value to zero. */ |
robert_lp | 0:eedb7d567a5d | 73 | outIndex = 0U; |
robert_lp | 0:eedb7d567a5d | 74 | /* Load first input value that act as reference value for comparision */ |
robert_lp | 0:eedb7d567a5d | 75 | out = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 76 | |
robert_lp | 0:eedb7d567a5d | 77 | /* Loop unrolling */ |
robert_lp | 0:eedb7d567a5d | 78 | blkCnt = (blockSize - 1U) >> 2U; |
robert_lp | 0:eedb7d567a5d | 79 | |
robert_lp | 0:eedb7d567a5d | 80 | while (blkCnt > 0U) |
robert_lp | 0:eedb7d567a5d | 81 | { |
robert_lp | 0:eedb7d567a5d | 82 | /* Initialize minVal to the next consecutive values one by one */ |
robert_lp | 0:eedb7d567a5d | 83 | minVal1 = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 84 | minVal2 = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 85 | |
robert_lp | 0:eedb7d567a5d | 86 | /* compare for the minimum value */ |
robert_lp | 0:eedb7d567a5d | 87 | if (out > minVal1) |
robert_lp | 0:eedb7d567a5d | 88 | { |
robert_lp | 0:eedb7d567a5d | 89 | /* Update the minimum value and its index */ |
robert_lp | 0:eedb7d567a5d | 90 | out = minVal1; |
robert_lp | 0:eedb7d567a5d | 91 | outIndex = count + 1U; |
robert_lp | 0:eedb7d567a5d | 92 | } |
robert_lp | 0:eedb7d567a5d | 93 | |
robert_lp | 0:eedb7d567a5d | 94 | /* compare for the minimum value */ |
robert_lp | 0:eedb7d567a5d | 95 | if (out > minVal2) |
robert_lp | 0:eedb7d567a5d | 96 | { |
robert_lp | 0:eedb7d567a5d | 97 | /* Update the minimum value and its index */ |
robert_lp | 0:eedb7d567a5d | 98 | out = minVal2; |
robert_lp | 0:eedb7d567a5d | 99 | outIndex = count + 2U; |
robert_lp | 0:eedb7d567a5d | 100 | } |
robert_lp | 0:eedb7d567a5d | 101 | |
robert_lp | 0:eedb7d567a5d | 102 | /* Initialize minVal to the next consecutive values one by one */ |
robert_lp | 0:eedb7d567a5d | 103 | minVal1 = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 104 | minVal2 = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 105 | |
robert_lp | 0:eedb7d567a5d | 106 | /* compare for the minimum value */ |
robert_lp | 0:eedb7d567a5d | 107 | if (out > minVal1) |
robert_lp | 0:eedb7d567a5d | 108 | { |
robert_lp | 0:eedb7d567a5d | 109 | /* Update the minimum value and its index */ |
robert_lp | 0:eedb7d567a5d | 110 | out = minVal1; |
robert_lp | 0:eedb7d567a5d | 111 | outIndex = count + 3U; |
robert_lp | 0:eedb7d567a5d | 112 | } |
robert_lp | 0:eedb7d567a5d | 113 | |
robert_lp | 0:eedb7d567a5d | 114 | /* compare for the minimum value */ |
robert_lp | 0:eedb7d567a5d | 115 | if (out > minVal2) |
robert_lp | 0:eedb7d567a5d | 116 | { |
robert_lp | 0:eedb7d567a5d | 117 | /* Update the minimum value and its index */ |
robert_lp | 0:eedb7d567a5d | 118 | out = minVal2; |
robert_lp | 0:eedb7d567a5d | 119 | outIndex = count + 4U; |
robert_lp | 0:eedb7d567a5d | 120 | } |
robert_lp | 0:eedb7d567a5d | 121 | |
robert_lp | 0:eedb7d567a5d | 122 | count += 4U; |
robert_lp | 0:eedb7d567a5d | 123 | |
robert_lp | 0:eedb7d567a5d | 124 | /* Decrement the loop counter */ |
robert_lp | 0:eedb7d567a5d | 125 | blkCnt--; |
robert_lp | 0:eedb7d567a5d | 126 | } |
robert_lp | 0:eedb7d567a5d | 127 | |
robert_lp | 0:eedb7d567a5d | 128 | /* if (blockSize - 1U) is not multiple of 4 */ |
robert_lp | 0:eedb7d567a5d | 129 | blkCnt = (blockSize - 1U) % 4U; |
robert_lp | 0:eedb7d567a5d | 130 | |
robert_lp | 0:eedb7d567a5d | 131 | #else |
robert_lp | 0:eedb7d567a5d | 132 | /* Run the below code for Cortex-M0 */ |
robert_lp | 0:eedb7d567a5d | 133 | |
robert_lp | 0:eedb7d567a5d | 134 | float32_t minVal1, out; /* Temporary variables to store the output value. */ |
robert_lp | 0:eedb7d567a5d | 135 | uint32_t blkCnt, outIndex; /* loop counter */ |
robert_lp | 0:eedb7d567a5d | 136 | |
robert_lp | 0:eedb7d567a5d | 137 | /* Initialise the index value to zero. */ |
robert_lp | 0:eedb7d567a5d | 138 | outIndex = 0U; |
robert_lp | 0:eedb7d567a5d | 139 | /* Load first input value that act as reference value for comparision */ |
robert_lp | 0:eedb7d567a5d | 140 | out = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 141 | |
robert_lp | 0:eedb7d567a5d | 142 | blkCnt = (blockSize - 1U); |
robert_lp | 0:eedb7d567a5d | 143 | |
robert_lp | 0:eedb7d567a5d | 144 | #endif /* #if defined (ARM_MATH_DSP) */ |
robert_lp | 0:eedb7d567a5d | 145 | |
robert_lp | 0:eedb7d567a5d | 146 | while (blkCnt > 0U) |
robert_lp | 0:eedb7d567a5d | 147 | { |
robert_lp | 0:eedb7d567a5d | 148 | /* Initialize minVal to the next consecutive values one by one */ |
robert_lp | 0:eedb7d567a5d | 149 | minVal1 = *pSrc++; |
robert_lp | 0:eedb7d567a5d | 150 | |
robert_lp | 0:eedb7d567a5d | 151 | /* compare for the minimum value */ |
robert_lp | 0:eedb7d567a5d | 152 | if (out > minVal1) |
robert_lp | 0:eedb7d567a5d | 153 | { |
robert_lp | 0:eedb7d567a5d | 154 | /* Update the minimum value and it's index */ |
robert_lp | 0:eedb7d567a5d | 155 | out = minVal1; |
robert_lp | 0:eedb7d567a5d | 156 | outIndex = blockSize - blkCnt; |
robert_lp | 0:eedb7d567a5d | 157 | } |
robert_lp | 0:eedb7d567a5d | 158 | |
robert_lp | 0:eedb7d567a5d | 159 | /* Decrement the loop counter */ |
robert_lp | 0:eedb7d567a5d | 160 | blkCnt--; |
robert_lp | 0:eedb7d567a5d | 161 | } |
robert_lp | 0:eedb7d567a5d | 162 | |
robert_lp | 0:eedb7d567a5d | 163 | /* Store the minimum value and it's index into destination pointers */ |
robert_lp | 0:eedb7d567a5d | 164 | *pResult = out; |
robert_lp | 0:eedb7d567a5d | 165 | *pIndex = outIndex; |
robert_lp | 0:eedb7d567a5d | 166 | } |
robert_lp | 0:eedb7d567a5d | 167 | |
robert_lp | 0:eedb7d567a5d | 168 | /** |
robert_lp | 0:eedb7d567a5d | 169 | * @} end of Min group |
robert_lp | 0:eedb7d567a5d | 170 | */ |
robert_lp | 0:eedb7d567a5d | 171 |