text: /* ----------------------------------------------------------------------   
  * Copyright (C) 2010 ARM Limited. All rights reserved.   
  *   
  * $Date:        15. July 2011  
  * $Revision: 	V1.0.10  
  *   
  * Project: 	    CMSIS DSP Library   
  * Title:		arm_copy_q15.c   
  *   
  * Description:	Copies the elements of a Q15 vector.  
  *   
  * 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 0.0.7  2010/06/10    
  *    Misra-C changes done   
  * -------------------------------------------------------------------- */
  
  #include "arm_math.h"
  
  /**   
   * @ingroup groupSupport   
   */
  
  /**   
   * @addtogroup copy   
   * @{   
   */
  /**   
   * @brief Copies the elements of a Q15 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_q15(
    q15_t * pSrc,
    q15_t * pDst,
    uint32_t blockSize)
  {
    uint32_t blkCnt;                               /* loop counter */
  
  #ifndef ARM_MATH_CM0
  
    /* Run the below code for Cortex-M4 and Cortex-M3 */
  
    q15_t in1, in2;                                /* Temporary variables */
  
  
    /*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 */
      /* Read two inputs */
      in1 = *pSrc++;
      in2 = *pSrc++;
  
  #ifndef ARM_MATH_BIG_ENDIAN
  
      /* Store the values in the destination buffer by packing the two inputs */
      *__SIMD32(pDst)++ = __PKHBT(in1, in2, 16);
  
      in1 = *pSrc++;
      in2 = *pSrc++;
      *__SIMD32(pDst)++ = __PKHBT(in1, in2, 16);
  
  #else
  
      /* Store the values in the destination buffer by packing the two inputs */
      *__SIMD32(pDst)++ = __PKHBT(in2, in1, 16);
  
      in1 = *pSrc++;
      in2 = *pSrc++;
      *__SIMD32(pDst)++ = __PKHBT(in2, in1, 16);
  
  
  #endif /*      #ifndef ARM_MATH_BIG_ENDIAN     */
  
      /* 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 */
  
    while(blkCnt > 0u)
    {
      /* C = A */
      /* Copy and then store the value in the destination buffer */
      *pDst++ = *pSrc++;
  
      /* Decrement the loop counter */
      blkCnt--;
    }
  }
  
  /**   
   * @} end of BasicCopy group   
   */
  