text: /* ----------------------------------------------------------------------
   * Project:      CMSIS DSP Library
   * Title:        arm_mat_cmplx_trans_f32.c
   * Description:  Floating-point complex matrix transpose
   *
   * $Date:        08. July 2020
   * $Revision:    V1.6.0
   *
   * Target Processor: Cortex-M cores
   * -------------------------------------------------------------------- */
  /*
   * Copyright (C) 2010-2020 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
   */
  
  /**
    @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"
   */
  
  /**
    @addtogroup MatrixTrans
    @{
   */
  
  /**
    @brief         Floating-point 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
   */
  #if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE)
  
  #include "arm_helium_utils.h"
  
  arm_status arm_mat_cmplx_trans_f32(const arm_matrix_instance_f32 * pSrc, arm_matrix_instance_f32 * pDst)
  {
      return arm_mat_cmplx_trans_32bit(pSrc->numRows, pSrc->numCols, (uint32_t *) pSrc->pData,
                                     pDst->numRows, pDst->numCols, (uint32_t *) pDst->pData);
  }
  
  #else
  arm_status arm_mat_cmplx_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 */
    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 + CMPLX_DIM * i;
  
        /* Initialize column loop counter */
        col = nColumns;
  
        while (col > 0U)
        {
          /* Read and store the input element in the destination */
          px[0] = *pIn++; // real
          px[1] = *pIn++; // imag
  
          /* Update the pointer px to point to the next row of the transposed matrix */
          px += CMPLX_DIM * nRows;
  
          /* Decrement the column loop counter */
          col--;
        }
        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);
  }
  #endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */
  
  /**
   * @} end of MatrixTrans group
   */
  