armfly/Libraries/CMSIS/DSP_Lib/Source/SupportFunctions/arm_copy_f32.c

/* ----------------------------------------------------------------------------    
* Copyright (C) 2010-2014 ARM Limited. All rights reserved.    
*    
* $Date:        31. July 2014
* $Revision: 	V1.4.4  
*    
* Project: 	    CMSIS DSP Library    
* Title:		arm_copy_f32.c    
*    
* Description:	Copies the elements of a floating-point vector.  
*    
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
*  
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions
* are met:
*   - Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*   - Redistributions in binary form must reproduce the above copyright
*     notice, this list of conditions and the following disclaimer in
*     the documentation and/or other materials provided with the 
*     distribution.
*   - Neither the name of ARM LIMITED nor the names of its contributors
*     may be used to endorse or promote products derived from this
*     software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* ---------------------------------------------------------------------------- */

#include "arm_math.h"

/**    
 * @ingroup groupSupport    
 */

/**    
 * @defgroup copy Vector Copy    
 *    
 * Copies sample by sample from source vector to destination vector.    
 *    
 * <pre>    
 * 	pDst[n] = pSrc[n];   0 <= n < blockSize.    
 * </pre>    
 *   
 * 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 */

#ifndef ARM_MATH_CM0_FAMILY

  /* Run the below code for Cortex-M4 and Cortex-M3 */
  float32_t in1, in2, in3, in4;

  /*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 */
    in1 = *pSrc++;
    in2 = *pSrc++;
    in3 = *pSrc++;
    in4 = *pSrc++;

    *pDst++ = in1;
    *pDst++ = in2;
    *pDst++ = in3;
    *pDst++ = in4;

    /* 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;

#else

  /* Run the below code for Cortex-M0 */

  /* Loop over blockSize number of values */
  blkCnt = blockSize;

#endif /* #ifndef ARM_MATH_CM0_FAMILY */

  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    
 */