arm_copy_q31.c

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/* ----------------------------------------------------------------------     
* Copyright (C) 2011 ARM Limited. All rights reserved. 
*     
* $Date:        15. December 2011   
* $Revision:    V2.0.0  
*     
* Project:      Cortex-R DSP Library 
* Title:        arm_copy_q31.c     
*     
* Description:  Copies the elements of a Q31 vector.    
*     
* Target Processor:          Cortex-R4/R5
*
* Version 1.0.0 2011/03/08
*     Alpha release.
*
* Version 1.0.1 2011/09/30
*     Beta release.
*
* Version 2.0.0 2011/12/15
*     Final release. 
* 
* -------------------------------------------------------------------- */  
  
#include "arm_math.h"  
  
void arm_copy_q31(  
  q31_t * pSrc,  
  q31_t * pDst,  
  uint32_t blockSize)  
{  
  uint32_t blkCnt;                               /* loop counter */     
  q31_t in1, in2, in3, in4, in5, in6, in7, in8;  
     
  /*loop Unrolling */     
  blkCnt = blockSize >> 3u;     
     
  /* First part of the processing with loop unrolling.  Compute 8 outputs at a time.      
   ** a second loop below computes the remaining 1 to 7 samples. */     
  while(blkCnt > 0u)     
  {     
    /* C = A */     
    /* Copy and then store the results in the destination buffer */     
    in1 = pSrc[0];  
    in2 = pSrc[1];  
    in3 = pSrc[2];  
    in4 = pSrc[3];  
    in5 = pSrc[4];  
    in6 = pSrc[5];  
    in7 = pSrc[6];  
    in8 = pSrc[7];  
  
    pDst[0] = in1;  
    pDst[1] = in2;  
    pDst[2] = in3;  
    pDst[3] = in4;  
    pDst[4] = in5;  
    pDst[5] = in6;  
    pDst[6] = in7;  
    pDst[7] = in8;  
  
    pSrc += 8u;  
    pDst += 8u;  
    
    /* Decrement the loop counter */     
    blkCnt--;     
  }     
     
  /* If the blockSize is not a multiple of 8, compute any remaining output samples here.      
   ** No loop unrolling is used. */     
  blkCnt = blockSize % 0x8u;     
  
  while(blkCnt > 0u)  
  {  
    /* C = A */  
    /* Copy and then store the value in the destination buffer */  
    *pDst++ = *pSrc++;  
  
    /* Decrement the loop counter */  
    blkCnt--;  
  }  
}