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CMSIS/DSP/Source/MatrixFunctions/arm_mat_cmplx_trans_q15.c

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+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_mat_cmplx_trans_q31.c
+ * Description:  Q15 complex matrix transpose
+ *
+ * $Date:        23 April 2021
+ * $Revision:    V1.9.0
+ *
+ * Target Processor: Cortex-M and Cortex-A cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2021 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 "dsp/matrix_functions.h"
+
+/**
+  @ingroup groupMatrix
+ */
+
+/**
+  @addtogroup MatrixComplexTrans
+  @{
+ */
+
+/**
+  @brief         Q15 complex 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_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
+
+#include "arm_helium_utils.h"
+
+arm_status arm_mat_cmplx_trans_q15(const arm_matrix_instance_q15 * pSrc, arm_matrix_instance_q15 * pDst)
+{
+    return arm_mat_cmplx_trans_16bit(pSrc->numRows, pSrc->numCols, (uint16_t *) pSrc->pData,
+                                   pDst->numRows, pDst->numCols, (uint16_t *) pDst->pData);
+}
+
+
+#else
+arm_status arm_mat_cmplx_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 */
+
+
+#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 + CMPLX_DIM * i;
+
+      /* Initialize column loop counter */
+      col = nColumns;
+
+      while (col > 0U)
+      {
+        /* Read and store the input element in the destination */
+        pOut[0] = *pSrcA++; //real
+        pOut[1] = *pSrcA++; //imag
+
+        /* Update the pointer pOut to point to the next row of the transposed matrix */
+        pOut += CMPLX_DIM *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);
+}
+#endif /* defined(ARM_MATH_MVEI) */
+
+/**
+ * @} end of MatrixTrans group
+ */