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src/Cortex-M4-M3/MatrixFunctions/arm_mat_trans_q15.c@0:1014af42efd9, 2011-03-10 (annotated)

Committer:: simon
Date:: Thu Mar 10 15:07:50 2011 +0000
Revision:: 0:1014af42efd9

Who changed what in which revision?

User	Revision	Line number	New contents of line
simon	0:1014af42efd9	1	/* ----------------------------------------------------------------------
simon	0:1014af42efd9	2	* Copyright (C) 2010 ARM Limited. All rights reserved.
simon	0:1014af42efd9	3	*
simon	0:1014af42efd9	4	* $Date: 29. November 2010
simon	0:1014af42efd9	5	* $Revision: V1.0.3
simon	0:1014af42efd9	6	*
simon	0:1014af42efd9	7	* Project: CMSIS DSP Library
simon	0:1014af42efd9	8	* Title: arm_mat_trans_q15.c
simon	0:1014af42efd9	9	*
simon	0:1014af42efd9	10	* Description: Q15 matrix transpose.
simon	0:1014af42efd9	11	*
simon	0:1014af42efd9	12	* Target Processor: Cortex-M4/Cortex-M3
simon	0:1014af42efd9	13	*
simon	0:1014af42efd9	14	* Version 1.0.3 2010/11/29
simon	0:1014af42efd9	15	* Re-organized the CMSIS folders and updated documentation.
simon	0:1014af42efd9	16	*
simon	0:1014af42efd9	17	* Version 1.0.2 2010/11/11
simon	0:1014af42efd9	18	* Documentation updated.
simon	0:1014af42efd9	19	*
simon	0:1014af42efd9	20	* Version 1.0.1 2010/10/05
simon	0:1014af42efd9	21	* Production release and review comments incorporated.
simon	0:1014af42efd9	22	*
simon	0:1014af42efd9	23	* Version 1.0.0 2010/09/20
simon	0:1014af42efd9	24	* Production release and review comments incorporated.
simon	0:1014af42efd9	25	*
simon	0:1014af42efd9	26	* Version 0.0.5 2010/04/26
simon	0:1014af42efd9	27	* incorporated review comments and updated with latest CMSIS layer
simon	0:1014af42efd9	28	*
simon	0:1014af42efd9	29	* Version 0.0.3 2010/03/10
simon	0:1014af42efd9	30	* Initial version
simon	0:1014af42efd9	31	* -------------------------------------------------------------------- */
simon	0:1014af42efd9	32
simon	0:1014af42efd9	33	#include "arm_math.h"
simon	0:1014af42efd9	34
simon	0:1014af42efd9	35	/**
simon	0:1014af42efd9	36	* @ingroup groupMatrix
simon	0:1014af42efd9	37	*/
simon	0:1014af42efd9	38
simon	0:1014af42efd9	39	/**
simon	0:1014af42efd9	40	* @addtogroup MatrixTrans
simon	0:1014af42efd9	41	* @{
simon	0:1014af42efd9	42	*/
simon	0:1014af42efd9	43
simon	0:1014af42efd9	44	/*
simon	0:1014af42efd9	45	* @brief Q15 matrix transpose.
simon	0:1014af42efd9	46	* @param[in] *pSrc points to the input matrix
simon	0:1014af42efd9	47	* @param[out] *pDst points to the output matrix
simon	0:1014af42efd9	48	* @return The function returns either <code>ARM_MATH_SIZE_MISMATCH</code>
simon	0:1014af42efd9	49	* or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
simon	0:1014af42efd9	50	*/
simon	0:1014af42efd9	51
simon	0:1014af42efd9	52	arm_status arm_mat_trans_q15(
simon	0:1014af42efd9	53	const arm_matrix_instance_q15 * pSrc,
simon	0:1014af42efd9	54	arm_matrix_instance_q15 * pDst)
simon	0:1014af42efd9	55	{
simon	0:1014af42efd9	56	q15_t pSrcA = pSrc->pData; / input data matrix pointer */
simon	0:1014af42efd9	57	q15_t pOut = pDst->pData; / output data matrix pointer */
simon	0:1014af42efd9	58	// q15_t pDst = pDst->pData; / output data matrix pointer */
simon	0:1014af42efd9	59	uint16_t nRows = pSrc->numRows; /* number of nRows */
simon	0:1014af42efd9	60	uint16_t nColumns = pSrc->numCols; /* number of nColumns */
simon	0:1014af42efd9	61	uint16_t col, row = nRows, i = 0u; /* row and column loop counters */
simon	0:1014af42efd9	62	q31_t in; /* variable to hold temporary output */
simon	0:1014af42efd9	63	arm_status status; /* status of matrix transpose */
simon	0:1014af42efd9	64
simon	0:1014af42efd9	65
simon	0:1014af42efd9	66	#ifdef ARM_MATH_MATRIX_CHECK
simon	0:1014af42efd9	67	/* Check for matrix mismatch condition */
simon	0:1014af42efd9	68	if((pSrc->numRows != pDst->numCols) \|\| (pSrc->numCols != pDst->numRows))
simon	0:1014af42efd9	69	{
simon	0:1014af42efd9	70	/* Set status as ARM_MATH_SIZE_MISMATCH */
simon	0:1014af42efd9	71	status = ARM_MATH_SIZE_MISMATCH;
simon	0:1014af42efd9	72	}
simon	0:1014af42efd9	73	else
simon	0:1014af42efd9	74	#endif
simon	0:1014af42efd9	75	{
simon	0:1014af42efd9	76	/* Matrix transpose by exchanging the rows with columns */
simon	0:1014af42efd9	77	/* row loop */
simon	0:1014af42efd9	78	do
simon	0:1014af42efd9	79	{
simon	0:1014af42efd9	80	/* Apply loop unrolling and exchange the columns with row elements */
simon	0:1014af42efd9	81	col = nColumns >> 2u;
simon	0:1014af42efd9	82
simon	0:1014af42efd9	83	/* The pointer pOut is set to starting address of the column being processed */
simon	0:1014af42efd9	84	pOut = pDst->pData + i;
simon	0:1014af42efd9	85
simon	0:1014af42efd9	86	/* First part of the processing with loop unrolling. Compute 4 outputs at a time.
simon	0:1014af42efd9	87	** a second loop below computes the remaining 1 to 3 samples. */
simon	0:1014af42efd9	88	while(col > 0u)
simon	0:1014af42efd9	89	{
simon	0:1014af42efd9	90	/* Read two elements from the row */
simon	0:1014af42efd9	91	in = *__SIMD32(pSrcA)++;
simon	0:1014af42efd9	92
simon	0:1014af42efd9	93	/* Unpack and store one element in the destination */
simon	0:1014af42efd9	94	*pOut = (q15_t) in;
simon	0:1014af42efd9	95
simon	0:1014af42efd9	96	/* Update the pointer pOut to point to the next row of the transposed matrix */
simon	0:1014af42efd9	97	pOut += nRows;
simon	0:1014af42efd9	98
simon	0:1014af42efd9	99	/* Unpack and store the second element in the destination */
simon	0:1014af42efd9	100	*pOut = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
simon	0:1014af42efd9	101
simon	0:1014af42efd9	102	/* Update the pointer pOut to point to the next row of the transposed matrix */
simon	0:1014af42efd9	103	pOut += nRows;
simon	0:1014af42efd9	104
simon	0:1014af42efd9	105	/* Read two elements from the row */
simon	0:1014af42efd9	106	in = *__SIMD32(pSrcA)++;
simon	0:1014af42efd9	107
simon	0:1014af42efd9	108	/* Unpack and store one element in the destination */
simon	0:1014af42efd9	109	*pOut = (q15_t) in;
simon	0:1014af42efd9	110
simon	0:1014af42efd9	111	/* Update the pointer pOut to point to the next row of the transposed matrix */
simon	0:1014af42efd9	112	pOut += nRows;
simon	0:1014af42efd9	113
simon	0:1014af42efd9	114	/* Unpack and store the second element in the destination */
simon	0:1014af42efd9	115	*pOut = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
simon	0:1014af42efd9	116
simon	0:1014af42efd9	117	/* Update the pointer pOut to point to the next row of the transposed matrix */
simon	0:1014af42efd9	118	pOut += nRows;
simon	0:1014af42efd9	119
simon	0:1014af42efd9	120	/* Decrement the column loop counter */
simon	0:1014af42efd9	121	col--;
simon	0:1014af42efd9	122	}
simon	0:1014af42efd9	123
simon	0:1014af42efd9	124	/* Perform matrix transpose for last 3 samples here. */
simon	0:1014af42efd9	125	col = nColumns % 0x4u;
simon	0:1014af42efd9	126
simon	0:1014af42efd9	127	while(col > 0u)
simon	0:1014af42efd9	128	{
simon	0:1014af42efd9	129	/* Read and store the input element in the destination */
simon	0:1014af42efd9	130	pOut = pSrcA++;
simon	0:1014af42efd9	131
simon	0:1014af42efd9	132	/* Update the pointer pOut to point to the next row of the transposed matrix */
simon	0:1014af42efd9	133	pOut += nRows;
simon	0:1014af42efd9	134
simon	0:1014af42efd9	135	/* Decrement the column loop counter */
simon	0:1014af42efd9	136	col--;
simon	0:1014af42efd9	137	}
simon	0:1014af42efd9	138
simon	0:1014af42efd9	139	i++;
simon	0:1014af42efd9	140
simon	0:1014af42efd9	141	/* Decrement the row loop counter */
simon	0:1014af42efd9	142	row--;
simon	0:1014af42efd9	143
simon	0:1014af42efd9	144	} while(row > 0u);
simon	0:1014af42efd9	145
simon	0:1014af42efd9	146	/* set status as ARM_MATH_SUCCESS */
simon	0:1014af42efd9	147	status = ARM_MATH_SUCCESS;
simon	0:1014af42efd9	148	}
simon	0:1014af42efd9	149	/* Return to application */
simon	0:1014af42efd9	150	return (status);
simon	0:1014af42efd9	151	}
simon	0:1014af42efd9	152
simon	0:1014af42efd9	153	/**
simon	0:1014af42efd9	154	* @} end of MatrixTrans group
simon	0:1014af42efd9	155	*/

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Type:	Library
Created:	10 Mar 2011
Imports:	907
Forks:	1
Commits:	3
Dependents:	5
Dependencies:	0
Followers:	35

src/Cortex-M4-M3/MatrixFunctions/arm_mat_trans_q15.c@0:1014af42efd9, 2011-03-10 (annotated)

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