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/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_mat_trans_q7.c
* Description: Q7 matrix transpose
*
* $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/matrix_functions.h"
/**
@ingroup groupMatrix
*/
/**
@addtogroup MatrixTrans
@{
*/
/**
@brief Q7 matrix transpose.
@param[in] pSrc points to input matrix
@param[out] pDst points to output matrix
@return execution status
- \ref ARM_MATH_SUCCESS : Operation successful
- \ref ARM_MATH_SIZE_MISMATCH : Matrix size check failed
*/
#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
arm_status arm_mat_trans_q7(const arm_matrix_instance_q7 *pSrc, arm_matrix_instance_q7 *pDst)
{
uint16x8_t vecOffs;
uint32_t i;
uint32_t blkCnt;
uint8_t const *pDataC;
uint8_t *pDataDestR;
uint16x8_t vecIn;
const uint8_t * pDataSrc=(const uint8_t *)pSrc->pData;
uint8_t * pDataDst=(uint8_t *)pDst->pData;
#ifdef ARM_MATH_MATRIX_CHECK
/* Check for matrix mismatch condition */
if ((pSrc->numRows != pDst->numCols) || (pSrc->numCols != pDst->numRows))
{
/* Set status as ARM_MATH_SIZE_MISMATCH */
return ARM_MATH_SIZE_MISMATCH;
}
#endif
vecOffs = vidupq_u16((uint32_t)0, 1);
vecOffs = vecOffs * pSrc->numCols;
i = pSrc->numCols;
do
{
pDataC = (uint8_t const *) pDataSrc;
pDataDestR = (uint8_t*)pDataDst;
blkCnt = pSrc->numRows >> 3;
while (blkCnt > 0U)
{
/* widened loads */
vecIn = vldrbq_gather_offset_u16(pDataC, vecOffs);
vstrbq_u16(pDataDestR, vecIn);
pDataDestR += 8;
pDataC = pDataC + pSrc->numCols * 8;
/*
* Decrement the blockSize loop counter
*/
blkCnt--;
}
/*
* tail
* (will be merged thru tail predication)
*/
blkCnt = pSrc->numRows & 7;
if (blkCnt > 0U)
{
mve_pred16_t p0 = vctp16q(blkCnt);
vecIn = vldrbq_gather_offset_u16(pDataC, vecOffs);
vstrbq_p_u16(pDataDestR, vecIn, p0);
}
pDataSrc += 1;
pDataDst += pSrc->numRows;
}
while (--i);
return (ARM_MATH_SUCCESS);
}
#else
arm_status arm_mat_trans_q7(const arm_matrix_instance_q7 *pSrc, arm_matrix_instance_q7 *pDst)
{
q7_t *pSrcA = pSrc->pData; /* input data matrix pointer */
q7_t *pOut = pDst->pData; /* output data matrix pointer */
uint16_t nRows = pSrc->numRows; /* number of nRows */
uint16_t nColumns = pSrc->numCols; /* number of nColumns */
uint16_t col, row = nRows, i = 0U; /* row and column loop counters */
arm_status status; /* status of matrix transpose */
#ifdef ARM_MATH_MATRIX_CHECK
/* Check for matrix mismatch condition */
if ((pSrc->numRows != pDst->numCols) || (pSrc->numCols != pDst->numRows)) {
/* Set status as ARM_MATH_SIZE_MISMATCH */
status = ARM_MATH_SIZE_MISMATCH;
} else
#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
{
/* Matrix transpose by exchanging the rows with columns */
/* row loop */
do {
/* The pointer pOut is set to starting address of the column being processed */
pOut = pDst->pData + i;
/* Initialize column loop counter */
col = nColumns;
while (col > 0U) {
/* Read and store the input element in the destination */
*pOut = *pSrcA++;
/* Update the pointer pOut to point to the next row of the transposed matrix */
pOut += nRows;
/* Decrement the column loop counter */
col--;
}
i++;
/* Decrement the row loop counter */
row--;
} while (row > 0U);
/* set status as ARM_MATH_SUCCESS */
status = ARM_MATH_SUCCESS;
}
/* Return to application */
return (status);
}
#endif /* defined(ARM_MATH_MVEI) */
/**
@} end of MatrixTrans group
*/
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