arm_mat_trans_q31.c
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r41 | /* ---------------------------------------------------------------------- | ||
* Copyright (C) 2010 ARM Limited. All rights reserved. | ||||
* | ||||
* $Date: 15. July 2011 | ||||
* $Revision: V1.0.10 | ||||
* | ||||
* Project: CMSIS DSP Library | ||||
* Title: arm_mat_trans_q31.c | ||||
* | ||||
* Description: Q31 matrix transpose. | ||||
* | ||||
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 | ||||
* | ||||
* Version 1.0.10 2011/7/15 | ||||
* Big Endian support added and Merged M0 and M3/M4 Source code. | ||||
* | ||||
* Version 1.0.3 2010/11/29 | ||||
* Re-organized the CMSIS folders and updated documentation. | ||||
* | ||||
* Version 1.0.2 2010/11/11 | ||||
* Documentation updated. | ||||
* | ||||
* Version 1.0.1 2010/10/05 | ||||
* Production release and review comments incorporated. | ||||
* | ||||
* Version 1.0.0 2010/09/20 | ||||
* Production release and review comments incorporated. | ||||
* | ||||
* Version 0.0.5 2010/04/26 | ||||
* incorporated review comments and updated with latest CMSIS layer | ||||
* | ||||
* Version 0.0.3 2010/03/10 | ||||
* Initial version | ||||
* -------------------------------------------------------------------- */ | ||||
#include "arm_math.h" | ||||
/** | ||||
* @ingroup groupMatrix | ||||
*/ | ||||
/** | ||||
* @addtogroup MatrixTrans | ||||
* @{ | ||||
*/ | ||||
/* | ||||
* @brief Q31 matrix transpose. | ||||
* @param[in] *pSrc points to the input matrix | ||||
* @param[out] *pDst points to the output matrix | ||||
* @return The function returns either <code>ARM_MATH_SIZE_MISMATCH</code> | ||||
* or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking. | ||||
*/ | ||||
arm_status arm_mat_trans_q31( | ||||
const arm_matrix_instance_q31 * pSrc, | ||||
arm_matrix_instance_q31 * pDst) | ||||
{ | ||||
q31_t *pIn = pSrc->pData; /* input data matrix pointer */ | ||||
q31_t *pOut = pDst->pData; /* output data matrix pointer */ | ||||
q31_t *px; /* Temporary output data matrix pointer */ | ||||
uint16_t nRows = pSrc->numRows; /* number of nRows */ | ||||
uint16_t nColumns = pSrc->numCols; /* number of nColumns */ | ||||
#ifndef ARM_MATH_CM0 | ||||
/* Run the below code for Cortex-M4 and Cortex-M3 */ | ||||
uint16_t blkCnt, i = 0u, row = nRows; /* 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 | ||||
{ | ||||
/* Apply loop unrolling and exchange the columns with row elements */ | ||||
blkCnt = nColumns >> 2u; | ||||
/* The pointer px is set to starting address of the column being processed */ | ||||
px = pOut + i; | ||||
/* First part of the processing with loop unrolling. Compute 4 outputs at a time. | ||||
** a second loop below computes the remaining 1 to 3 samples. */ | ||||
while(blkCnt > 0u) | ||||
{ | ||||
/* Read and store the input element in the destination */ | ||||
*px = *pIn++; | ||||
/* Update the pointer px to point to the next row of the transposed matrix */ | ||||
px += nRows; | ||||
/* Read and store the input element in the destination */ | ||||
*px = *pIn++; | ||||
/* Update the pointer px to point to the next row of the transposed matrix */ | ||||
px += nRows; | ||||
/* Read and store the input element in the destination */ | ||||
*px = *pIn++; | ||||
/* Update the pointer px to point to the next row of the transposed matrix */ | ||||
px += nRows; | ||||
/* Read and store the input element in the destination */ | ||||
*px = *pIn++; | ||||
/* Update the pointer px to point to the next row of the transposed matrix */ | ||||
px += nRows; | ||||
/* Decrement the column loop counter */ | ||||
blkCnt--; | ||||
} | ||||
/* Perform matrix transpose for last 3 samples here. */ | ||||
blkCnt = nColumns % 0x4u; | ||||
while(blkCnt > 0u) | ||||
{ | ||||
/* Read and store the input element in the destination */ | ||||
*px = *pIn++; | ||||
/* Update the pointer px to point to the next row of the transposed matrix */ | ||||
px += nRows; | ||||
/* Decrement the column loop counter */ | ||||
blkCnt--; | ||||
} | ||||
#else | ||||
/* Run the below code for Cortex-M0 */ | ||||
uint16_t col, i = 0u, row = nRows; /* 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 px is set to starting address of the column being processed */ | ||||
px = pOut + i; | ||||
/* Initialize column loop counter */ | ||||
col = nColumns; | ||||
while(col > 0u) | ||||
{ | ||||
/* Read and store the input element in the destination */ | ||||
*px = *pIn++; | ||||
/* Update the pointer px to point to the next row of the transposed matrix */ | ||||
px += nRows; | ||||
/* Decrement the column loop counter */ | ||||
col--; | ||||
} | ||||
#endif /* #ifndef ARM_MATH_CM0 */ | ||||
i++; | ||||
/* Decrement the row loop counter */ | ||||
row--; | ||||
} | ||||
while(row > 0u); /* row loop end */ | ||||
/* set status as ARM_MATH_SUCCESS */ | ||||
status = ARM_MATH_SUCCESS; | ||||
} | ||||
/* Return to application */ | ||||
return (status); | ||||
} | ||||
/** | ||||
* @} end of MatrixTrans group | ||||
*/ | ||||