Robert Lopez / CMSIS5

Aded CMSIS5 DSP and NN folder. Needs some work

DSP/source/StatisticsFunctions/arm_min_q7.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?

UserRevisionLine numberNew contents of line
robert_lp 0:eedb7d567a5d 1 /* ----------------------------------------------------------------------
robert_lp 0:eedb7d567a5d 2 * Project: CMSIS DSP Library
robert_lp 0:eedb7d567a5d 3 * Title: arm_min_q7.c
robert_lp 0:eedb7d567a5d 4 * Description: Minimum value of a Q7 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 /**
robert_lp 0:eedb7d567a5d 37 * @addtogroup Min
robert_lp 0:eedb7d567a5d 38 * @{
robert_lp 0:eedb7d567a5d 39 */
robert_lp 0:eedb7d567a5d 40
robert_lp 0:eedb7d567a5d 41
robert_lp 0:eedb7d567a5d 42 /**
robert_lp 0:eedb7d567a5d 43 * @brief Minimum value of a Q7 vector.
robert_lp 0:eedb7d567a5d 44 * @param[in] *pSrc points to the input vector
robert_lp 0:eedb7d567a5d 45 * @param[in] blockSize length of the input vector
robert_lp 0:eedb7d567a5d 46 * @param[out] *pResult minimum value returned here
robert_lp 0:eedb7d567a5d 47 * @param[out] *pIndex index of minimum value returned here
robert_lp 0:eedb7d567a5d 48 * @return none.
robert_lp 0:eedb7d567a5d 49 */
robert_lp 0:eedb7d567a5d 50
robert_lp 0:eedb7d567a5d 51 void arm_min_q7(
robert_lp 0:eedb7d567a5d 52 q7_t * pSrc,
robert_lp 0:eedb7d567a5d 53 uint32_t blockSize,
robert_lp 0:eedb7d567a5d 54 q7_t * pResult,
robert_lp 0:eedb7d567a5d 55 uint32_t * pIndex)
robert_lp 0:eedb7d567a5d 56 {
robert_lp 0:eedb7d567a5d 57 #if defined (ARM_MATH_DSP)
robert_lp 0:eedb7d567a5d 58 /* Run the below code for Cortex-M4 and Cortex-M3 */
robert_lp 0:eedb7d567a5d 59
robert_lp 0:eedb7d567a5d 60 q7_t minVal1, minVal2, out; /* Temporary variables to store the output value. */
robert_lp 0:eedb7d567a5d 61 uint32_t blkCnt, outIndex, count; /* loop counter */
robert_lp 0:eedb7d567a5d 62
robert_lp 0:eedb7d567a5d 63 /* Initialise the count value. */
robert_lp 0:eedb7d567a5d 64 count = 0U;
robert_lp 0:eedb7d567a5d 65 /* Initialise the index value to zero. */
robert_lp 0:eedb7d567a5d 66 outIndex = 0U;
robert_lp 0:eedb7d567a5d 67 /* Load first input value that act as reference value for comparision */
robert_lp 0:eedb7d567a5d 68 out = *pSrc++;
robert_lp 0:eedb7d567a5d 69
robert_lp 0:eedb7d567a5d 70 /* Loop unrolling */
robert_lp 0:eedb7d567a5d 71 blkCnt = (blockSize - 1U) >> 2U;
robert_lp 0:eedb7d567a5d 72
robert_lp 0:eedb7d567a5d 73 while (blkCnt > 0U)
robert_lp 0:eedb7d567a5d 74 {
robert_lp 0:eedb7d567a5d 75 /* Initialize minVal to the next consecutive values one by one */
robert_lp 0:eedb7d567a5d 76 minVal1 = *pSrc++;
robert_lp 0:eedb7d567a5d 77 minVal2 = *pSrc++;
robert_lp 0:eedb7d567a5d 78
robert_lp 0:eedb7d567a5d 79 /* compare for the minimum value */
robert_lp 0:eedb7d567a5d 80 if (out > minVal1)
robert_lp 0:eedb7d567a5d 81 {
robert_lp 0:eedb7d567a5d 82 /* Update the minimum value and its index */
robert_lp 0:eedb7d567a5d 83 out = minVal1;
robert_lp 0:eedb7d567a5d 84 outIndex = count + 1U;
robert_lp 0:eedb7d567a5d 85 }
robert_lp 0:eedb7d567a5d 86
robert_lp 0:eedb7d567a5d 87 /* compare for the minimum value */
robert_lp 0:eedb7d567a5d 88 if (out > minVal2)
robert_lp 0:eedb7d567a5d 89 {
robert_lp 0:eedb7d567a5d 90 /* Update the minimum value and its index */
robert_lp 0:eedb7d567a5d 91 out = minVal2;
robert_lp 0:eedb7d567a5d 92 outIndex = count + 2U;
robert_lp 0:eedb7d567a5d 93 }
robert_lp 0:eedb7d567a5d 94
robert_lp 0:eedb7d567a5d 95 /* Initialize minVal to the next consecutive values one by one */
robert_lp 0:eedb7d567a5d 96 minVal1 = *pSrc++;
robert_lp 0:eedb7d567a5d 97 minVal2 = *pSrc++;
robert_lp 0:eedb7d567a5d 98
robert_lp 0:eedb7d567a5d 99 /* compare for the minimum value */
robert_lp 0:eedb7d567a5d 100 if (out > minVal1)
robert_lp 0:eedb7d567a5d 101 {
robert_lp 0:eedb7d567a5d 102 /* Update the minimum value and its index */
robert_lp 0:eedb7d567a5d 103 out = minVal1;
robert_lp 0:eedb7d567a5d 104 outIndex = count + 3U;
robert_lp 0:eedb7d567a5d 105 }
robert_lp 0:eedb7d567a5d 106
robert_lp 0:eedb7d567a5d 107 /* compare for the minimum value */
robert_lp 0:eedb7d567a5d 108 if (out > minVal2)
robert_lp 0:eedb7d567a5d 109 {
robert_lp 0:eedb7d567a5d 110 /* Update the minimum value and its index */
robert_lp 0:eedb7d567a5d 111 out = minVal2;
robert_lp 0:eedb7d567a5d 112 outIndex = count + 4U;
robert_lp 0:eedb7d567a5d 113 }
robert_lp 0:eedb7d567a5d 114
robert_lp 0:eedb7d567a5d 115 count += 4U;
robert_lp 0:eedb7d567a5d 116
robert_lp 0:eedb7d567a5d 117 /* Decrement the loop counter */
robert_lp 0:eedb7d567a5d 118 blkCnt--;
robert_lp 0:eedb7d567a5d 119 }
robert_lp 0:eedb7d567a5d 120
robert_lp 0:eedb7d567a5d 121 /* if (blockSize - 1U) is not multiple of 4 */
robert_lp 0:eedb7d567a5d 122 blkCnt = (blockSize - 1U) % 4U;
robert_lp 0:eedb7d567a5d 123
robert_lp 0:eedb7d567a5d 124 #else
robert_lp 0:eedb7d567a5d 125 /* Run the below code for Cortex-M0 */
robert_lp 0:eedb7d567a5d 126
robert_lp 0:eedb7d567a5d 127 q7_t minVal1, out; /* Temporary variables to store the output value. */
robert_lp 0:eedb7d567a5d 128 uint32_t blkCnt, outIndex; /* loop counter */
robert_lp 0:eedb7d567a5d 129
robert_lp 0:eedb7d567a5d 130 /* Initialise the index value to zero. */
robert_lp 0:eedb7d567a5d 131 outIndex = 0U;
robert_lp 0:eedb7d567a5d 132 /* Load first input value that act as reference value for comparision */
robert_lp 0:eedb7d567a5d 133 out = *pSrc++;
robert_lp 0:eedb7d567a5d 134
robert_lp 0:eedb7d567a5d 135 blkCnt = (blockSize - 1U);
robert_lp 0:eedb7d567a5d 136
robert_lp 0:eedb7d567a5d 137 #endif /* #if defined (ARM_MATH_DSP) */
robert_lp 0:eedb7d567a5d 138
robert_lp 0:eedb7d567a5d 139 while (blkCnt > 0U)
robert_lp 0:eedb7d567a5d 140 {
robert_lp 0:eedb7d567a5d 141 /* Initialize minVal to the next consecutive values one by one */
robert_lp 0:eedb7d567a5d 142 minVal1 = *pSrc++;
robert_lp 0:eedb7d567a5d 143
robert_lp 0:eedb7d567a5d 144 /* compare for the minimum value */
robert_lp 0:eedb7d567a5d 145 if (out > minVal1)
robert_lp 0:eedb7d567a5d 146 {
robert_lp 0:eedb7d567a5d 147 /* Update the minimum value and it's index */
robert_lp 0:eedb7d567a5d 148 out = minVal1;
robert_lp 0:eedb7d567a5d 149 outIndex = blockSize - blkCnt;
robert_lp 0:eedb7d567a5d 150 }
robert_lp 0:eedb7d567a5d 151
robert_lp 0:eedb7d567a5d 152 /* Decrement the loop counter */
robert_lp 0:eedb7d567a5d 153 blkCnt--;
robert_lp 0:eedb7d567a5d 154 }
robert_lp 0:eedb7d567a5d 155
robert_lp 0:eedb7d567a5d 156 /* Store the minimum value and it's index into destination pointers */
robert_lp 0:eedb7d567a5d 157 *pResult = out;
robert_lp 0:eedb7d567a5d 158 *pIndex = outIndex;
robert_lp 0:eedb7d567a5d 159 }
robert_lp 0:eedb7d567a5d 160
robert_lp 0:eedb7d567a5d 161 /**
robert_lp 0:eedb7d567a5d 162 * @} end of Min group
robert_lp 0:eedb7d567a5d 163 */
robert_lp 0:eedb7d567a5d 164