mirror of
https://github.com/IcedRooibos/py32f0-template.git
synced 2025-10-31 01:42:04 -07:00
323 lines
15 KiB
C
323 lines
15 KiB
C
/* ----------------------------------------------------------------------
|
|
* Project: CMSIS DSP Library
|
|
* Title: arm_absmin_q7.c
|
|
* Description: Minimum value of absolute values of a Q7 vector
|
|
*
|
|
* $Date: 23 April 2021
|
|
* $Revision: V1.9.0
|
|
*
|
|
* Target Processor: Cortex-M and Cortex-A cores
|
|
* -------------------------------------------------------------------- */
|
|
/*
|
|
* Copyright (C) 2010-2021 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 "dsp/statistics_functions.h"
|
|
|
|
/**
|
|
@ingroup groupStats
|
|
*/
|
|
|
|
|
|
/**
|
|
@addtogroup AbsMin
|
|
@{
|
|
*/
|
|
|
|
/**
|
|
@brief Minimum value of absolute values of a Q7 vector.
|
|
@param[in] pSrc points to the input vector
|
|
@param[in] blockSize number of samples in input vector
|
|
@param[out] pResult minimum value returned here
|
|
@param[out] pIndex index of minimum value returned here
|
|
@return none
|
|
*/
|
|
#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
|
|
|
|
#include <stdint.h>
|
|
#include "arm_helium_utils.h"
|
|
|
|
#define MAX_BLKSZ_S8 (UINT8_MAX+1)
|
|
|
|
static void arm_small_blk_absmin_q7(
|
|
const q7_t *pSrc,
|
|
uint32_t blockSize,
|
|
q7_t *pResult,
|
|
uint32_t *pIndex)
|
|
{
|
|
uint16_t blkCnt; /* loop counters */
|
|
q7x16_t vecSrc;
|
|
q7_t const *pSrcVec;
|
|
q7x16_t curExtremValVec = vdupq_n_s8(Q7_ABSMAX);
|
|
q7_t minValue = Q7_ABSMAX;
|
|
uint16_t idx = blockSize - 1;
|
|
uint8x16_t indexVec;
|
|
uint8x16_t curExtremIdxVec;
|
|
uint32_t startIdx = 0;
|
|
mve_pred16_t p0;
|
|
|
|
|
|
indexVec = vidupq_wb_u8(&startIdx, 1);
|
|
curExtremIdxVec = vdupq_n_u8(0);
|
|
|
|
pSrcVec = (q7_t const *) pSrc;
|
|
blkCnt = blockSize >> 4;
|
|
while (blkCnt > 0U)
|
|
{
|
|
vecSrc = vld1q(pSrcVec);
|
|
pSrcVec += 16;
|
|
vecSrc = vabsq(vecSrc);
|
|
/*
|
|
* Get current min per lane and current index per lane
|
|
* when a min is selected
|
|
*/
|
|
p0 = vcmpleq(vecSrc, curExtremValVec);
|
|
curExtremValVec = vpselq(vecSrc, curExtremValVec, p0);
|
|
curExtremIdxVec = vpselq(indexVec, curExtremIdxVec, p0);
|
|
|
|
indexVec = vidupq_wb_u8(&startIdx, 1);
|
|
/*
|
|
* Decrement the blockSize loop counter
|
|
*/
|
|
blkCnt--;
|
|
}
|
|
/*
|
|
* tail
|
|
* (will be merged thru tail predication)
|
|
*/
|
|
blkCnt = blockSize & 0xF;
|
|
if (blkCnt > 0U)
|
|
{
|
|
vecSrc = vld1q(pSrcVec);
|
|
pSrcVec += 16;
|
|
vecSrc = vabsq(vecSrc);
|
|
|
|
p0 = vctp8q(blkCnt);
|
|
/*
|
|
* Get current min per lane and current index per lane
|
|
* when a min is selected
|
|
*/
|
|
p0 = vcmpleq_m(vecSrc, curExtremValVec, p0);
|
|
curExtremValVec = vpselq(vecSrc, curExtremValVec, p0);
|
|
curExtremIdxVec = vpselq(indexVec, curExtremIdxVec, p0);
|
|
}
|
|
/*
|
|
* Get min value across the vector
|
|
*/
|
|
minValue = vminvq(minValue, curExtremValVec);
|
|
/*
|
|
* set index for lower values to min possible index
|
|
*/
|
|
p0 = vcmpleq(curExtremValVec, minValue);
|
|
idx = vminvq_p_u8(idx, curExtremIdxVec, p0);
|
|
/*
|
|
* Save result
|
|
*/
|
|
*pIndex = idx;
|
|
*pResult = minValue;
|
|
}
|
|
|
|
|
|
void arm_absmin_q7(
|
|
const q7_t * pSrc,
|
|
uint32_t blockSize,
|
|
q7_t * pResult,
|
|
uint32_t * pIndex)
|
|
{
|
|
int32_t totalSize = blockSize;
|
|
|
|
if (totalSize <= MAX_BLKSZ_S8)
|
|
{
|
|
arm_small_blk_absmin_q7(pSrc, blockSize, pResult, pIndex);
|
|
}
|
|
else
|
|
{
|
|
uint32_t curIdx = 0;
|
|
q7_t curBlkExtr = Q7_MAX;
|
|
uint32_t curBlkPos = 0;
|
|
uint32_t curBlkIdx = 0;
|
|
/*
|
|
* process blocks of 255 elts
|
|
*/
|
|
while (totalSize >= MAX_BLKSZ_S8)
|
|
{
|
|
const q7_t *curSrc = pSrc;
|
|
|
|
arm_small_blk_absmin_q7(curSrc, MAX_BLKSZ_S8, pResult, pIndex);
|
|
if (*pResult < curBlkExtr)
|
|
{
|
|
/*
|
|
* update partial extrema
|
|
*/
|
|
curBlkExtr = *pResult;
|
|
curBlkPos = *pIndex;
|
|
curBlkIdx = curIdx;
|
|
}
|
|
curIdx++;
|
|
pSrc += MAX_BLKSZ_S8;
|
|
totalSize -= MAX_BLKSZ_S8;
|
|
}
|
|
/*
|
|
* remainder
|
|
*/
|
|
arm_small_blk_absmin_q7(pSrc, totalSize, pResult, pIndex);
|
|
if (*pResult < curBlkExtr)
|
|
{
|
|
curBlkExtr = *pResult;
|
|
curBlkPos = *pIndex;
|
|
curBlkIdx = curIdx;
|
|
}
|
|
*pIndex = curBlkIdx * MAX_BLKSZ_S8 + curBlkPos;
|
|
*pResult = curBlkExtr;
|
|
}
|
|
}
|
|
|
|
#else
|
|
#if defined(ARM_MATH_DSP)
|
|
void arm_absmin_q7(
|
|
const q7_t * pSrc,
|
|
uint32_t blockSize,
|
|
q7_t * pResult,
|
|
uint32_t * pIndex)
|
|
{
|
|
q7_t cur_absmin, out; /* Temporary variables to store the output value. */\
|
|
uint32_t blkCnt, outIndex; /* Loop counter */ \
|
|
uint32_t index; /* index of maximum value */ \
|
|
\
|
|
/* Initialize index value to zero. */ \
|
|
outIndex = 0U; \
|
|
/* Load first input value that act as reference value for comparision */ \
|
|
out = *pSrc++; \
|
|
out = (out > 0) ? out : (q7_t)__QSUB8(0, out); \
|
|
/* Initialize index of extrema value. */ \
|
|
index = 0U; \
|
|
\
|
|
/* Loop unrolling: Compute 4 outputs at a time */ \
|
|
blkCnt = (blockSize - 1U) >> 2U; \
|
|
\
|
|
while (blkCnt > 0U) \
|
|
{ \
|
|
/* Initialize cur_absmin to next consecutive values one by one */ \
|
|
cur_absmin = *pSrc++; \
|
|
cur_absmin = (cur_absmin > 0) ? cur_absmin : (q7_t)__QSUB8(0, cur_absmin); \
|
|
/* compare for the extrema value */ \
|
|
if (cur_absmin < out) \
|
|
{ \
|
|
/* Update the extrema value and it's index */ \
|
|
out = cur_absmin; \
|
|
outIndex = index + 1U; \
|
|
} \
|
|
\
|
|
cur_absmin = *pSrc++; \
|
|
cur_absmin = (cur_absmin > 0) ? cur_absmin : (q7_t)__QSUB8(0, cur_absmin); \
|
|
if (cur_absmin < out) \
|
|
{ \
|
|
out = cur_absmin; \
|
|
outIndex = index + 2U; \
|
|
} \
|
|
\
|
|
cur_absmin = *pSrc++; \
|
|
cur_absmin = (cur_absmin > 0) ? cur_absmin : (q7_t)__QSUB8(0, cur_absmin); \
|
|
if (cur_absmin < out) \
|
|
{ \
|
|
out = cur_absmin; \
|
|
outIndex = index + 3U; \
|
|
} \
|
|
\
|
|
cur_absmin = *pSrc++; \
|
|
cur_absmin = (cur_absmin > 0) ? cur_absmin : (q7_t)__QSUB8(0, cur_absmin); \
|
|
if (cur_absmin < out) \
|
|
{ \
|
|
out = cur_absmin; \
|
|
outIndex = index + 4U; \
|
|
} \
|
|
\
|
|
index += 4U; \
|
|
\
|
|
/* Decrement loop counter */ \
|
|
blkCnt--; \
|
|
} \
|
|
\
|
|
/* Loop unrolling: Compute remaining outputs */ \
|
|
blkCnt = (blockSize - 1U) % 4U; \
|
|
\
|
|
\
|
|
while (blkCnt > 0U) \
|
|
{ \
|
|
cur_absmin = *pSrc++; \
|
|
cur_absmin = (cur_absmin > 0) ? cur_absmin : (q7_t)__QSUB8(0, cur_absmin); \
|
|
if (cur_absmin < out) \
|
|
{ \
|
|
out = cur_absmin; \
|
|
outIndex = blockSize - blkCnt; \
|
|
} \
|
|
\
|
|
/* Decrement loop counter */ \
|
|
blkCnt--; \
|
|
} \
|
|
\
|
|
/* Store the extrema value and it's index into destination pointers */ \
|
|
*pResult = out; \
|
|
*pIndex = outIndex;
|
|
}
|
|
#else
|
|
void arm_absmin_q7(
|
|
const q7_t * pSrc,
|
|
uint32_t blockSize,
|
|
q7_t * pResult,
|
|
uint32_t * pIndex)
|
|
{
|
|
q7_t minVal, out; /* Temporary variables to store the output value. */
|
|
uint32_t blkCnt, outIndex; /* Loop counter */
|
|
|
|
/* Initialise index value to zero. */
|
|
outIndex = 0U;
|
|
/* Load first input value that act as reference value for comparision */
|
|
out = (*pSrc > 0) ? *pSrc : ((*pSrc == (q7_t) 0x80) ? (q7_t) 0x7f : -*pSrc);
|
|
pSrc++;
|
|
|
|
/* Initialize blkCnt with number of samples */
|
|
blkCnt = (blockSize - 1U);
|
|
|
|
while (blkCnt > 0U)
|
|
{
|
|
/* Initialize minVal to the next consecutive values one by one */
|
|
minVal = (*pSrc > 0) ? *pSrc : ((*pSrc == (q7_t) 0x80) ? (q7_t) 0x7f : -*pSrc);
|
|
pSrc++;
|
|
|
|
/* compare for the minimum value */
|
|
if (out > minVal)
|
|
{
|
|
/* Update the minimum value and it's index */
|
|
out = minVal;
|
|
outIndex = blockSize - blkCnt;
|
|
}
|
|
|
|
/* Decrement loop counter */
|
|
blkCnt--;
|
|
}
|
|
|
|
/* Store the minimum value and it's index into destination pointers */
|
|
*pResult = out;
|
|
*pIndex = outIndex;
|
|
}
|
|
#endif /* defined(ARM_MATH_DSP) */
|
|
#endif /* defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) */
|
|
/**
|
|
@} end of AbsMin group
|
|
*/
|