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authorjaseg <git-bigdata-wsl-arch@jaseg.de>2020-05-03 19:53:02 +0200
committerjaseg <git-bigdata-wsl-arch@jaseg.de>2020-05-03 19:53:02 +0200
commit2628932a40d769d8d0180ba6fed1e7b9b2718982 (patch)
treeea485897653003d01cd16e2b506f69363928fafa /Blink/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_min_q7.c
parent972da3c0fd449dd6153edaf3c56e0c50d16b726b (diff)
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-/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_min_q7.c
- * Description: Minimum value of a Q7 vector
- *
- * $Date: 27. January 2017
- * $Revision: V.1.5.1
- *
- * Target Processor: Cortex-M cores
- * -------------------------------------------------------------------- */
-/*
- * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an AS IS BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "arm_math.h"
-
-/**
- * @ingroup groupStats
- */
-
-
-/**
- * @addtogroup Min
- * @{
- */
-
-
-/**
- * @brief Minimum value of a Q7 vector.
- * @param[in] *pSrc points to the input vector
- * @param[in] blockSize length of the input vector
- * @param[out] *pResult minimum value returned here
- * @param[out] *pIndex index of minimum value returned here
- * @return none.
- */
-
-void arm_min_q7(
- q7_t * pSrc,
- uint32_t blockSize,
- q7_t * pResult,
- uint32_t * pIndex)
-{
-#if defined (ARM_MATH_DSP)
- /* Run the below code for Cortex-M4 and Cortex-M3 */
-
- q7_t minVal1, minVal2, out; /* Temporary variables to store the output value. */
- uint32_t blkCnt, outIndex, count; /* loop counter */
-
- /* Initialise the count value. */
- count = 0U;
- /* Initialise the index value to zero. */
- outIndex = 0U;
- /* Load first input value that act as reference value for comparision */
- out = *pSrc++;
-
- /* Loop unrolling */
- blkCnt = (blockSize - 1U) >> 2U;
-
- while (blkCnt > 0U)
- {
- /* Initialize minVal to the next consecutive values one by one */
- minVal1 = *pSrc++;
- minVal2 = *pSrc++;
-
- /* compare for the minimum value */
- if (out > minVal1)
- {
- /* Update the minimum value and its index */
- out = minVal1;
- outIndex = count + 1U;
- }
-
- /* compare for the minimum value */
- if (out > minVal2)
- {
- /* Update the minimum value and its index */
- out = minVal2;
- outIndex = count + 2U;
- }
-
- /* Initialize minVal to the next consecutive values one by one */
- minVal1 = *pSrc++;
- minVal2 = *pSrc++;
-
- /* compare for the minimum value */
- if (out > minVal1)
- {
- /* Update the minimum value and its index */
- out = minVal1;
- outIndex = count + 3U;
- }
-
- /* compare for the minimum value */
- if (out > minVal2)
- {
- /* Update the minimum value and its index */
- out = minVal2;
- outIndex = count + 4U;
- }
-
- count += 4U;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* if (blockSize - 1U) is not multiple of 4 */
- blkCnt = (blockSize - 1U) % 4U;
-
-#else
- /* Run the below code for Cortex-M0 */
-
- q7_t minVal1, out; /* Temporary variables to store the output value. */
- uint32_t blkCnt, outIndex; /* loop counter */
-
- /* Initialise the index value to zero. */
- outIndex = 0U;
- /* Load first input value that act as reference value for comparision */
- out = *pSrc++;
-
- blkCnt = (blockSize - 1U);
-
-#endif /* #if defined (ARM_MATH_DSP) */
-
- while (blkCnt > 0U)
- {
- /* Initialize minVal to the next consecutive values one by one */
- minVal1 = *pSrc++;
-
- /* compare for the minimum value */
- if (out > minVal1)
- {
- /* Update the minimum value and it's index */
- out = minVal1;
- outIndex = blockSize - blkCnt;
- }
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* Store the minimum value and it's index into destination pointers */
- *pResult = out;
- *pIndex = outIndex;
-}
-
-/**
- * @} end of Min group
- */