144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
|
/* ----------------------------------------------------------------------
|
||
|
|
* Project: CMSIS DSP Library
|
||
|
|
* Title: arm_mat_sub_f64.c
|
||
|
|
* Description: Floating-point matrix subtraction
|
||
|
|
*
|
||
|
|
* $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
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
@defgroup MatrixSub Matrix Subtraction
|
||
|
|
|
||
|
|
Subtract two matrices.
|
||
|
|
\image html MatrixSubtraction.gif "Subraction of two 3 x 3 matrices"
|
||
|
|
|
||
|
|
The functions check to make sure that
|
||
|
|
<code>pSrcA</code>, <code>pSrcB</code>, and <code>pDst</code> have the same
|
||
|
|
number of rows and columns.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
@addtogroup MatrixSub
|
||
|
|
@{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
@brief Floating-point matrix subtraction.
|
||
|
|
@param[in] pSrcA points to the first input matrix structure
|
||
|
|
@param[in] pSrcB points to the second input matrix structure
|
||
|
|
@param[out] pDst points to output matrix structure
|
||
|
|
@return execution status
|
||
|
|
- \ref ARM_MATH_SUCCESS : Operation successful
|
||
|
|
- \ref ARM_MATH_SIZE_MISMATCH : Matrix size check failed
|
||
|
|
*/
|
||
|
|
|
||
|
|
arm_status arm_mat_sub_f64(
|
||
|
|
const arm_matrix_instance_f64 * pSrcA,
|
||
|
|
const arm_matrix_instance_f64 * pSrcB,
|
||
|
|
arm_matrix_instance_f64 * pDst)
|
||
|
|
{
|
||
|
|
float64_t *pInA = pSrcA->pData; /* input data matrix pointer A */
|
||
|
|
float64_t *pInB = pSrcB->pData; /* input data matrix pointer B */
|
||
|
|
float64_t *pOut = pDst->pData; /* output data matrix pointer */
|
||
|
|
|
||
|
|
uint64_t numSamples; /* total number of elements in the matrix */
|
||
|
|
uint64_t blkCnt; /* loop counters */
|
||
|
|
arm_status status; /* status of matrix subtraction */
|
||
|
|
|
||
|
|
#ifdef ARM_MATH_MATRIX_CHECK
|
||
|
|
|
||
|
|
/* Check for matrix mismatch condition */
|
||
|
|
if ((pSrcA->numRows != pSrcB->numRows) ||
|
||
|
|
(pSrcA->numCols != pSrcB->numCols) ||
|
||
|
|
(pSrcA->numRows != pDst->numRows) ||
|
||
|
|
(pSrcA->numCols != pDst->numCols) )
|
||
|
|
{
|
||
|
|
/* Set status as ARM_MATH_SIZE_MISMATCH */
|
||
|
|
status = ARM_MATH_SIZE_MISMATCH;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
|
||
|
|
#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
|
||
|
|
|
||
|
|
{
|
||
|
|
/* Total number of samples in input matrix */
|
||
|
|
numSamples = (uint64_t) pSrcA->numRows * pSrcA->numCols;
|
||
|
|
|
||
|
|
#if defined (ARM_MATH_LOOPUNROLL)
|
||
|
|
|
||
|
|
/* Loop unrolling: Compute 4 outputs at a time */
|
||
|
|
blkCnt = numSamples >> 2U;
|
||
|
|
|
||
|
|
while (blkCnt > 0U)
|
||
|
|
{
|
||
|
|
/* C(m,n) = A(m,n) - B(m,n) */
|
||
|
|
|
||
|
|
/* Subtract and store result in destination buffer. */
|
||
|
|
*pOut++ = (*pInA++) - (*pInB++);
|
||
|
|
*pOut++ = (*pInA++) - (*pInB++);
|
||
|
|
*pOut++ = (*pInA++) - (*pInB++);
|
||
|
|
*pOut++ = (*pInA++) - (*pInB++);
|
||
|
|
|
||
|
|
/* Decrement loop counter */
|
||
|
|
blkCnt--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Loop unrolling: Compute remaining outputs */
|
||
|
|
blkCnt = numSamples % 0x4U;
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
/* Initialize blkCnt with number of samples */
|
||
|
|
blkCnt = numSamples;
|
||
|
|
|
||
|
|
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||
|
|
|
||
|
|
while (blkCnt > 0U)
|
||
|
|
{
|
||
|
|
/* C(m,n) = A(m,n) - B(m,n) */
|
||
|
|
|
||
|
|
/* Subtract and store result in destination buffer. */
|
||
|
|
*pOut++ = (*pInA++) - (*pInB++);
|
||
|
|
|
||
|
|
/* Decrement loop counter */
|
||
|
|
blkCnt--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set status as ARM_MATH_SUCCESS */
|
||
|
|
status = ARM_MATH_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return to application */
|
||
|
|
return (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
@} end of MatrixSub group
|
||
|
|
*/
|