/* ---------------------------------------------------------------------------- * Copyright (C) 2010 ARM Limited. All rights reserved. * * $Date: 29. November 2010 * $Revision: V1.0.3 * * Project: CMSIS DSP Library * Title: arm_copy_f32.c * * Description: Processing function for the floating-point copy * * Target Processor: Cortex-M4/Cortex-M3 * * 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 0.0.7 2010/06/10 * Misra-C changes done * ---------------------------------------------------------------------------- */ #include "arm_math.h" /** * @ingroup groupSupport */ /** * @defgroup copy Vector Copy * * Copies sample by sample from source vector to destination vector. * *
* pDst[n] = pSrc[n]; 0 <= n < blockSize. ** * There are separate functions for floating point, Q31, Q15, and Q7 data types. */ /** * @addtogroup copy * @{ */ /** * @brief Copies the elements of a floating-point vector. * @param[in] *pSrc points to input vector * @param[out] *pDst points to output vector * @param[in] blockSize length of the input vector * @return none. * */ void arm_copy_f32( float32_t * pSrc, float32_t * pDst, uint32_t blockSize) { uint32_t blkCnt; /* loop counter */ /*loop Unrolling */ blkCnt = blockSize >> 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 = A */ /* Copy and then store the results in the destination buffer */ *pDst++ = *pSrc++; *pDst++ = *pSrc++; *pDst++ = *pSrc++; *pDst++ = *pSrc++; /* Decrement the loop counter */ blkCnt--; } /* If the blockSize is not a multiple of 4, compute any remaining output samples here. ** No loop unrolling is used. */ blkCnt = blockSize % 0x4u; while(blkCnt > 0u) { /* C = A */ /* Copy and then store the results in the destination buffer */ *pDst++ = *pSrc++; /* Decrement the loop counter */ blkCnt--; } } /** * @} end of BasicCopy group */