| /* ---------------------------------------------------------------------- |
| * Project: CMSIS DSP Library |
| * Title: arm_mat_trans_q15.c |
| * Description: Q15 matrix transpose |
| * |
| * $Date: 18. March 2019 |
| * $Revision: V1.6.0 |
| * |
| * Target Processor: Cortex-M cores |
| * -------------------------------------------------------------------- */ |
| /* |
| * Copyright (C) 2010-2019 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 Q15 matrix transpose. |
| @param[in] pSrc points to input matrix |
| @param[out] pDst points to output matrix |
| @return execution status |
| - \ref ARM_MATH_SUCCESS : Operation successful |
| - \ref ARM_MATH_SIZE_MISMATCH : Matrix size check failed |
| */ |
| |
| arm_status arm_mat_trans_q15( |
| const arm_matrix_instance_q15 * pSrc, |
| arm_matrix_instance_q15 * pDst) |
| { |
| q15_t *pIn = pSrc->pData; /* input data matrix pointer */ |
| q15_t *pOut = pDst->pData; /* output data matrix pointer */ |
| uint16_t nRows = pSrc->numRows; /* number of rows */ |
| uint16_t nCols = pSrc->numCols; /* number of columns */ |
| uint32_t col, row = nRows, i = 0U; /* Loop counters */ |
| arm_status status; /* status of matrix transpose */ |
| |
| #if defined (ARM_MATH_LOOPUNROLL) |
| q31_t in; /* variable to hold temporary output */ |
| #endif |
| |
| #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 |
| { |
| /* Pointer pOut is set to starting address of column being processed */ |
| pOut = pDst->pData + i; |
| |
| #if defined (ARM_MATH_LOOPUNROLL) |
| |
| /* Loop unrolling: Compute 4 outputs at a time */ |
| col = nCols >> 2U; |
| |
| while (col > 0U) /* column loop */ |
| { |
| /* Read two elements from row */ |
| in = read_q15x2_ia ((q15_t **) &pIn); |
| |
| /* Unpack and store one element in 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 pointer pOut to point to next row of transposed matrix */ |
| pOut += nRows; |
| |
| /* Unpack and store second element in 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 pointer pOut to point to next row of transposed matrix */ |
| pOut += nRows; |
| |
| /* Read two elements from row */ |
| in = read_q15x2_ia ((q15_t **) &pIn); |
| |
| /* Unpack and store one element in 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 pointer pOut to point to next row of transposed matrix */ |
| pOut += nRows; |
| |
| /* Unpack and store second element in 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 pointer pOut to point to next row of transposed matrix */ |
| pOut += nRows; |
| |
| /* Decrement column loop counter */ |
| col--; |
| } |
| |
| /* Loop unrolling: Compute remaining outputs */ |
| col = nCols % 0x4U; |
| |
| #else |
| |
| /* Initialize col with number of samples */ |
| col = nCols; |
| |
| #endif /* #if defined (ARM_MATH_LOOPUNROLL) */ |
| |
| while (col > 0U) |
| { |
| /* Read and store input element in destination */ |
| *pOut = *pIn++; |
| |
| /* Update pointer pOut to point to next row of transposed matrix */ |
| pOut += nRows; |
| |
| /* Decrement column loop counter */ |
| col--; |
| } |
| |
| i++; |
| |
| /* Decrement 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 |
| */ |