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Official ARM version: v5.6.0

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rihab kouki 2020-07-28 11:24:49 +01:00
parent 9f95ff5b6b
commit 96d6da4e25
2939 changed files with 339304 additions and 113320 deletions
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124
DSP/Source/StatisticsFunctions/arm_max_q7.c
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@ -3,13 +3,13 @@
* Title: arm_max_q7.c
* Description: Maximum value of a Q7 vector
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
* $Date: 18. March 2019
* $Revision: V1.6.0
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
* Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
@ -29,126 +29,112 @@
#include "arm_math.h"
/**
* @ingroup groupStats
@ingroup groupStats
*/
/**
* @addtogroup Max
* @{
@addtogroup Max
@{
*/
/**
* @brief Maximum value of a Q7 vector.
* @param[in] *pSrc points to the input vector
* @param[in] blockSize length of the input vector
* @param[out] *pResult maximum value returned here
* @param[out] *pIndex index of maximum value returned here
* @return none.
@brief Maximum value of a Q7 vector.
@param[in] pSrc points to the input vector
@param[in] blockSize number of samples in input vector
@param[out] pResult maximum value returned here
@param[out] pIndex index of maximum value returned here
@return none
*/
void arm_max_q7(
q7_t * pSrc,
uint32_t blockSize,
q7_t * pResult,
uint32_t * pIndex)
const 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 maxVal, out; /* Temporary variables to store the output value. */
uint32_t blkCnt, outIndex; /* Loop counter */
q7_t maxVal1, maxVal2, out; /* Temporary variables to store the output value. */
uint32_t blkCnt, outIndex, count; /* loop counter */
#if defined (ARM_MATH_LOOPUNROLL)
uint32_t index; /* index of maximum value */
#endif
/* Initialise the count value. */
count = 0U;
/* Initialise the index value to zero. */
/* Initialise index value to zero. */
outIndex = 0U;
/* Load first input value that act as reference value for comparision */
out = *pSrc++;
/* Loop unrolling */
#if defined (ARM_MATH_LOOPUNROLL)
/* Initialise index of maximum value. */
index = 0U;
/* Loop unrolling: Compute 4 outputs at a time */
blkCnt = (blockSize - 1U) >> 2U;
while (blkCnt > 0U)
{
/* Initialize maxVal to the next consecutive values one by one */
maxVal1 = *pSrc++;
maxVal2 = *pSrc++;
/* Initialize maxVal to next consecutive values one by one */
maxVal = *pSrc++;
/* compare for the maximum value */
if (out < maxVal1)
if (out < maxVal)
{
/* Update the maximum value and its index */
out = maxVal1;
outIndex = count + 1U;
/* Update the maximum value and it's index */
out = maxVal;
outIndex = index + 1U;
}
/* compare for the maximum value */
if (out < maxVal2)
maxVal = *pSrc++;
if (out < maxVal)
{
/* Update the maximum value and its index */
out = maxVal2;
outIndex = count + 2U;
out = maxVal;
outIndex = index + 2U;
}
/* Initialize maxVal to the next consecutive values one by one */
maxVal1 = *pSrc++;
maxVal2 = *pSrc++;
/* compare for the maximum value */
if (out < maxVal1)
maxVal = *pSrc++;
if (out < maxVal)
{
/* Update the maximum value and its index */
out = maxVal1;
outIndex = count + 3U;
out = maxVal;
outIndex = index + 3U;
}
/* compare for the maximum value */
if (out < maxVal2)
maxVal = *pSrc++;
if (out < maxVal)
{
/* Update the maximum value and its index */
out = maxVal2;
outIndex = count + 4U;
out = maxVal;
outIndex = index + 4U;
}
count += 4U;
index += 4U;
/* Decrement the loop counter */
/* Decrement loop counter */
blkCnt--;
}
/* if (blockSize - 1U) is not multiple of 4 */
/* Loop unrolling: Compute remaining outputs */
blkCnt = (blockSize - 1U) % 4U;
#else
/* Run the below code for Cortex-M0 */
q7_t maxVal1, 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++;
/* Initialize blkCnt with number of samples */
blkCnt = (blockSize - 1U);
#endif /* #if defined (ARM_MATH_DSP) */
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
while (blkCnt > 0U)
{
/* Initialize maxVal to the next consecutive values one by one */
maxVal1 = *pSrc++;
maxVal = *pSrc++;
/* compare for the maximum value */
if (out < maxVal1)
if (out < maxVal)
{
/* Update the maximum value and it's index */
out = maxVal1;
out = maxVal;
outIndex = blockSize - blkCnt;
}
/* Decrement the loop counter */
/* Decrement loop counter */
blkCnt--;
}
@ -158,5 +144,5 @@ void arm_max_q7(
}
/**
* @} end of Max group
@} end of Max group
*/