text: /* ----------------------------------------------------------------------    
  * Copyright (C) 2010 ARM Limited. All rights reserved.    
  *    
  * $Date:        15. February 2012  
  * $Revision: 	V1.1.0  
  *    
  * Project: 	    CMSIS DSP Library    
  * Title:		arm_min_q15.c    
  *    
  * Description:	Minimum value of a Q15 vector.    
  *    
  * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
  *  
  * Version 1.1.0 2012/02/15 
  *    Updated with more optimizations, bug fixes and minor API changes.  
  *   
  * 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.    
  * ---------------------------------------------------------------------------- */
  
  #include "arm_math.h"
  
  /**    
   * @ingroup groupStats    
   */
  
  
  /**    
   * @addtogroup Min    
   * @{    
   */
  
  
  /**    
   * @brief Minimum value of a Q15 vector.    
   * @param[in]       *pSrc points to the input vector    
   * @param[in]       blockSize length of the input vector    
   * @param[out]      *pResult minimum value returned here    
   * @param[out]      *pIndex index of minimum value returned here    
   * @return none.    
   *    
   */
  
  void arm_min_q15(
    q15_t * pSrc,
    uint32_t blockSize,
    q15_t * pResult,
    uint32_t * pIndex)
  {
  #ifndef ARM_MATH_CM0
  
    /* Run the below code for Cortex-M4 and Cortex-M3 */
    q15_t minVal1, minVal2, out;                   /* Temporary variables to store the output value. */
    uint32_t blkCnt, outIndex, count;              /* loop counter */
  
    /* Initialise the count value. */
    count = 0u;
    /* Initialise the index value to zero. */
    outIndex = 0u;
    /* Load first input value that act as reference value for comparision */
    out = *pSrc++;
  
    /* Loop unrolling */
    blkCnt = (blockSize - 1u) >> 2u;
  
    while(blkCnt > 0)
    {
      /* Initialize minVal to the next consecutive values one by one */
      minVal1 = *pSrc++;
      minVal2 = *pSrc++;
  
      /* compare for the minimum value */
      if(out > minVal1)
      {
        /* Update the minimum value and its index */
        out = minVal1;
        outIndex = count + 1u;
      }
  
      minVal1 = *pSrc++;
  
      /* compare for the minimum value */
      if(out > minVal2)
      {
        /* Update the minimum value and its index */
        out = minVal2;
        outIndex = count + 2u;
      }
  
      minVal2 = *pSrc++;
  
      /* compare for the minimum value */
      if(out > minVal1)
      {
        /* Update the minimum value and its index */
        out = minVal1;
        outIndex = count + 3u;
      }
  
      /* compare for the minimum value */
      if(out > minVal2)
      {
        /* Update the minimum value and its index */
        out = minVal2;
        outIndex = count + 4u;
      }
  
      count += 4u;
  
      blkCnt--;
    }
  
    /* if (blockSize - 1u ) is not multiple of 4 */
    blkCnt = (blockSize - 1u) % 4u;
  
  #else
  
    /* Run the below code for Cortex-M0 */
    q15_t minVal1, out;                            /* Temporary variables to store the output value. */
    uint32_t blkCnt, outIndex;                     /* loop counter */
  
    blkCnt = (blockSize - 1u);
  
    /* Initialise the index value to zero. */
    outIndex = 0u;
    /* Load first input value that act as reference value for comparision */
    out = *pSrc++;
  
  #endif //      #ifndef ARM_MATH_CM0
  
    while(blkCnt > 0)
    {
      /* Initialize minVal to the next consecutive values one by one */
      minVal1 = *pSrc++;
  
      /* compare for the minimum value */
      if(out > minVal1)
      {
        /* Update the minimum value and it's index */
        out = minVal1;
        outIndex = blockSize - blkCnt;
      }
  
      blkCnt--;
  
    }
  
  
  
    /* Store the minimum value and its index into destination pointers */
    *pResult = out;
    *pIndex = outIndex;
  }
  
  /**    
   * @} end of Min group    
   */
  