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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_f64.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_f64.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_f64.c b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_f64.c new file mode 100644 index 0000000..245a76d --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_f64.c @@ -0,0 +1,143 @@ +/* ---------------------------------------------------------------------- + * 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 + */ |