The CMSIS DSP 5 library
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functions/MatrixFunctions/arm_mat_trans_q15.c
- Committer:
- xorjoep
- Date:
- 2018-06-21
- Revision:
- 3:4098b9d3d571
- Parent:
- 1:24714b45cd1b
File content as of revision 3:4098b9d3d571:
/* ---------------------------------------------------------------------- * Project: CMSIS DSP Library * Title: arm_mat_trans_q15.c * Description: Q15 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 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 */ #if defined (ARM_MATH_DSP) /* Run the below code for Cortex-M4 and Cortex-M3 */ #ifndef UNALIGNED_SUPPORT_DISABLE q31_t in; /* variable to hold temporary output */ #else q15_t in; #endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */ #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) { #ifndef UNALIGNED_SUPPORT_DISABLE /* 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 */ #else /* Read one element from the row */ in = *pSrcA++; /* Store one element in the destination */ *pOut = in; /* Update the pointer px to point to the next row of the transposed matrix */ pOut += nRows; /* Read one element from the row */ in = *pSrcA++; /* Store one element in the destination */ *pOut = in; /* Update the pointer px to point to the next row of the transposed matrix */ pOut += nRows; /* Read one element from the row */ in = *pSrcA++; /* Store one element in the destination */ *pOut = in; /* Update the pointer px to point to the next row of the transposed matrix */ pOut += nRows; /* Read one element from the row */ in = *pSrcA++; /* Store one element in the destination */ *pOut = in; #endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */ /* 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 /* #if defined (ARM_MATH_DSP) */ 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 */