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Removed error on fat32 library, seems now to be able navigate among sectors in...
Removed error on fat32 library, seems now to be able navigate among sectors in both directions. Improved SDLCD drawing performances by almost 1000x.
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arm_mat_trans_q15.c
234 lines | 6.2 KiB | text/x-c | CLexer
/ lib / src / stm32f4 / CPU / CMSIS / DSP_Lib / Source / MatrixFunctions / arm_mat_trans_q15.c
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/* ----------------------------------------------------------------------
* Copyright (C) 2010 ARM Limited. All rights reserved.
*
* $Date: 15. July 2011
* $Revision: V1.0.10
*
* Project: CMSIS DSP Library
* Title: arm_mat_trans_q15.c
*
* Description: Q15 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 Q15 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_q15(
const arm_matrix_instance_q15 * pSrc,
arm_matrix_instance_q15 * pDst)
{
q15_t *pSrcA = pSrc->pData; /* input data matrix pointer */
q15_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 */
#ifndef ARM_MATH_CM0
/* Run the below code for Cortex-M4 and Cortex-M3 */
q31_t in; /* variable to hold temporary output */
#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 */
col = nColumns >> 2u;
/* The pointer pOut is set to starting address of the column being processed */
pOut = pDst->pData + 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(col > 0u)
{
/* Read two elements from the row */
in = *__SIMD32(pSrcA)++;
/* Unpack and store one element in the destination */
#ifndef ARM_MATH_BIG_ENDIAN
*pOut = (q15_t) in;
#else
*pOut = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
/* Update the pointer pOut to point to the next row of the transposed matrix */
pOut += nRows;
/* Unpack and store the second element in the destination */
#ifndef ARM_MATH_BIG_ENDIAN
*pOut = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
#else
*pOut = (q15_t) in;
#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
/* Update the pointer pOut to point to the next row of the transposed matrix */
pOut += nRows;
/* Read two elements from the row */
#ifndef ARM_MATH_BIG_ENDIAN
in = *__SIMD32(pSrcA)++;
#else
in = *__SIMD32(pSrcA)++;
#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
/* Unpack and store one element in the destination */
#ifndef ARM_MATH_BIG_ENDIAN
*pOut = (q15_t) in;
#else
*pOut = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
/* Update the pointer pOut to point to the next row of the transposed matrix */
pOut += nRows;
/* Unpack and store the second element in the destination */
#ifndef ARM_MATH_BIG_ENDIAN
*pOut = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
#else
*pOut = (q15_t) in;
#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
/* Update the pointer pOut to point to the next row of the transposed matrix */
pOut += nRows;
/* Decrement the column loop counter */
col--;
}
/* Perform matrix transpose for last 3 samples here. */
col = nColumns % 0x4u;
#else
/* Run the below code for Cortex-M0 */
#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;
#endif /* #ifndef ARM_MATH_CM0 */
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);
}
/**
* @} end of MatrixTrans group
*/