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authorjoshua <joshua@joshuayun.com>2023-12-30 23:54:31 -0500
committerjoshua <joshua@joshuayun.com>2023-12-30 23:54:31 -0500
commit86608c6770cf08c138a2bdab5855072f64be09ef (patch)
tree494a61b3ef37e76f9235a0d10f5c93d97290a35f /Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_trans_f32.c
downloadsdr-software-86608c6770cf08c138a2bdab5855072f64be09ef.tar.gz
initial commitHEADmaster
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_trans_f32.c')
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+/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_mat_trans_f32.c
+ * Description: Floating-point matrix transpose
+ *
+ * $Date: 18. March 2019
+ * $Revision: V1.6.0
+ *
+ * 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
+ */
+
+/**
+ @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_NEON)
+
+arm_status arm_mat_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 blkCnt, rowCnt, 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 */
+ rowCnt = row >> 2;
+ while (rowCnt > 0U)
+ {
+ float32x4_t row0V,row1V,row2V,row3V;
+ float32x4x2_t ra0,ra1,rb0,rb1;
+
+ blkCnt = nColumns >> 2;
+
+ /* The pointer px is set to starting address of the column being processed */
+ px = pOut + i;
+
+ /* Compute 4 outputs at a time.
+ ** a second loop below computes the remaining 1 to 3 samples. */
+ while (blkCnt > 0U) /* Column loop */
+ {
+ row0V = vld1q_f32(pIn);
+ row1V = vld1q_f32(pIn + 1 * nColumns);
+ row2V = vld1q_f32(pIn + 2 * nColumns);
+ row3V = vld1q_f32(pIn + 3 * nColumns);
+ pIn += 4;
+
+ ra0 = vzipq_f32(row0V,row2V);
+ ra1 = vzipq_f32(row1V,row3V);
+
+ rb0 = vzipq_f32(ra0.val[0],ra1.val[0]);
+ rb1 = vzipq_f32(ra0.val[1],ra1.val[1]);
+
+ vst1q_f32(px,rb0.val[0]);
+ px += nRows;
+
+ vst1q_f32(px,rb0.val[1]);
+ px += nRows;
+
+ vst1q_f32(px,rb1.val[0]);
+ px += nRows;
+
+ vst1q_f32(px,rb1.val[1]);
+ 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;
+ *px++ = *(pIn + 1 * nColumns);
+ *px++ = *(pIn + 2 * nColumns);
+ *px++ = *(pIn + 3 * nColumns);
+
+ px += (nRows - 4);
+ pIn++;
+
+ /* Decrement the column loop counter */
+ blkCnt--;
+ }
+
+ i += 4;
+ pIn += 3 * nColumns;
+
+ /* Decrement the row loop counter */
+ rowCnt--;
+
+ } /* Row loop end */
+
+ rowCnt = row & 3;
+ while (rowCnt > 0U)
+ {
+ blkCnt = nColumns ;
+ /* The pointer px is set to starting address of the column being processed */
+ px = pOut + i;
+
+ 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--;
+ }
+ i++;
+ rowCnt -- ;
+ }
+
+ /* Set status as ARM_MATH_SUCCESS */
+ status = ARM_MATH_SUCCESS;
+ }
+
+ /* Return to application */
+ return (status);
+}
+#else
+arm_status arm_mat_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 nCols = pSrc->numCols; /* number of columns */
+ uint32_t col, row = nRows, i = 0U; /* 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
+ {
+ /* Pointer px is set to starting address of column being processed */
+ px = pOut + i;
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+ /* Loop unrolling: Compute 4 outputs at a time */
+ col = nCols >> 2U;
+
+ while (col > 0U) /* column loop */
+ {
+ /* Read and store input element in destination */
+ *px = *pIn++;
+ /* Update pointer px to point to next row of transposed matrix */
+ px += nRows;
+
+ *px = *pIn++;
+ px += nRows;
+
+ *px = *pIn++;
+ px += nRows;
+
+ *px = *pIn++;
+ px += 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 */
+ *px = *pIn++;
+
+ /* Update pointer px to point to next row of transposed matrix */
+ px += 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);
+}
+#endif /* #if defined(ARM_MATH_NEON) */
+
+/**
+ * @} end of MatrixTrans group
+ */
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