arm_mat_sub_f32.c
151 lines
| 4.6 KiB
| text/x-c
|
CLexer
jeandet@pc-de-jeandet3.LAB-LPP.LOCAL
|
r41 | /* ---------------------------------------------------------------------- | ||
| * Copyright (C) 2010 ARM Limited. All rights reserved. | ||||
| * | ||||
| * $Date: 15. July 2011 | ||||
| * $Revision: V1.0.10 | ||||
| * | ||||
| * Project: CMSIS DSP Library | ||||
| * Title: arm_mat_sub_f32.c | ||||
| * | ||||
| * Description: Floating-point matrix subtraction. | ||||
| * | ||||
| * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 | ||||
| * | ||||
| * Version 1.0.10 2011/7/15 | ||||
| * Big Endian support added and Merged M0 and M3/M4 Source code. | ||||
| * | ||||
| * Version 1.0.3 2010/11/29 | ||||
| * Re-organized the CMSIS folders and updated documentation. | ||||
| * | ||||
| * Version 1.0.2 2010/11/11 | ||||
| * Documentation updated. | ||||
| * | ||||
| * Version 1.0.1 2010/10/05 | ||||
| * Production release and review comments incorporated. | ||||
| * | ||||
| * Version 1.0.0 2010/09/20 | ||||
| * Production release and review comments incorporated. | ||||
| * | ||||
| * Version 0.0.5 2010/04/26 | ||||
| * incorporated review comments and updated with latest CMSIS layer | ||||
| * | ||||
| * Version 0.0.3 2010/03/10 | ||||
| * Initial version | ||||
| * -------------------------------------------------------------------- */ | ||||
| #include "arm_math.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 The function returns either | ||||
| * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking. | ||||
| */ | ||||
| arm_status arm_mat_sub_f32( | ||||
| const arm_matrix_instance_f32 * pSrcA, | ||||
| const arm_matrix_instance_f32 * pSrcB, | ||||
| arm_matrix_instance_f32 * pDst) | ||||
| { | ||||
| float32_t *pIn1 = pSrcA->pData; /* input data matrix pointer A */ | ||||
| float32_t *pIn2 = pSrcB->pData; /* input data matrix pointer B */ | ||||
| float32_t *pOut = pDst->pData; /* output data matrix pointer */ | ||||
| uint32_t numSamples; /* total number of elements in the matrix */ | ||||
| uint32_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 the input matrix */ | ||||
| numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols; | ||||
| #ifndef ARM_MATH_CM0 | ||||
| /* Run the below code for Cortex-M4 and Cortex-M3 */ | ||||
| /* Loop Unrolling */ | ||||
| blkCnt = numSamples >> 2u; | ||||
| /* First part of the processing with loop unrolling. Compute 4 outputs at a time. | ||||
| ** a second loop below computes the remaining 1 to 3 samples. */ | ||||
| while(blkCnt > 0u) | ||||
| { | ||||
| /* C(m,n) = A(m,n) - B(m,n) */ | ||||
| /* Subtract and then store the results in the destination buffer. */ | ||||
| *pOut++ = (*pIn1++) - (*pIn2++); | ||||
| *pOut++ = (*pIn1++) - (*pIn2++); | ||||
| *pOut++ = (*pIn1++) - (*pIn2++); | ||||
| *pOut++ = (*pIn1++) - (*pIn2++); | ||||
| /* Decrement the loop counter */ | ||||
| blkCnt--; | ||||
| } | ||||
| /* If the numSamples is not a multiple of 4, compute any remaining output samples here. | ||||
| ** No loop unrolling is used. */ | ||||
| blkCnt = numSamples % 0x4u; | ||||
| #else | ||||
| /* Run the below code for Cortex-M0 */ | ||||
| /* Initialize blkCnt with number of samples */ | ||||
| blkCnt = numSamples; | ||||
| #endif /* #ifndef ARM_MATH_CM0 */ | ||||
| while(blkCnt > 0u) | ||||
| { | ||||
| /* C(m,n) = A(m,n) - B(m,n) */ | ||||
| /* Subtract and then store the results in the destination buffer. */ | ||||
| *pOut++ = (*pIn1++) - (*pIn2++); | ||||
| /* Decrement the loop counter */ | ||||
| blkCnt--; | ||||
| } | ||||
| /* Set status as ARM_MATH_SUCCESS */ | ||||
| status = ARM_MATH_SUCCESS; | ||||
| } | ||||
| /* Return to application */ | ||||
| return (status); | ||||
| } | ||||
| /** | ||||
| * @} end of MatrixSub group | ||||
| */ | ||||