| /* ---------------------------------------------------------------------- |
| * Project: CMSIS DSP Library |
| * Title: arm_mat_trans_q31.c |
| * Description: Q31 matrix transpose |
| * |
| * $Date: 27. January 2017 |
| * $Revision: V.1.5.1 |
| * |
| * Target Processor: Cortex-M cores |
| * -------------------------------------------------------------------- */ |
| /* |
| * Copyright (C) 2010-2017 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 "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 */ |
| |
| #if defined (ARM_MATH_DSP) |
| |
| /* 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 /* #if defined (ARM_MATH_DSP) */ |
| |
| 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 |
| */ |