| /* ---------------------------------------------------------------------- |
| * Copyright (C) 2010-2014 ARM Limited. All rights reserved. |
| * |
| * $Date: 19. March 2015 |
| * $Revision: V.1.4.5 |
| * |
| * Project: CMSIS DSP Library |
| * Title: arm_mat_trans_f32.c |
| * |
| * Description: Floating-point matrix transpose. |
| * |
| * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * - Neither the name of ARM LIMITED nor the names of its contributors |
| * may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| * -------------------------------------------------------------------- */ |
| |
| /** |
| * @defgroup MatrixTrans Matrix Transpose |
| * |
| * Tranposes a matrix. |
| * Transposing an <code>M x N</code> matrix flips it around the center diagonal and results in an <code>N x M</code> matrix. |
| * \image html MatrixTranspose.gif "Transpose of a 3 x 3 matrix" |
| */ |
| |
| #include "arm_math.h" |
| |
| /** |
| * @ingroup groupMatrix |
| */ |
| |
| /** |
| * @addtogroup MatrixTrans |
| * @{ |
| */ |
| |
| /** |
| * @brief Floating-point 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_f32( |
| const arm_matrix_instance_f32 * pSrc, |
| arm_matrix_instance_f32 * pDst) |
| { |
| float32_t *pIn = pSrc->pData; /* input data matrix pointer */ |
| float32_t *pOut = pDst->pData; /* output data matrix pointer */ |
| float32_t *px; /* Temporary output data matrix pointer */ |
| uint16_t nRows = pSrc->numRows; /* number of rows */ |
| uint16_t nColumns = pSrc->numCols; /* number of columns */ |
| |
| #ifndef ARM_MATH_CM0_FAMILY |
| |
| /* 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 |
| { |
| /* Loop Unrolling */ |
| blkCnt = nColumns >> 2; |
| |
| /* 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) /* column loop */ |
| { |
| /* 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_FAMILY */ |
| |
| 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 |
| */ |
