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# arm_min_f32.c

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    00001 /* ----------------------------------------------------------------------
    00002 * Copyright (C) 2010 ARM Limited. All rights reserved.
    00003 *
    00004 * $Date:        29. November 2010
    00005 * $Revision:    V1.0.3
    00006 *
    00007 * Project:      CMSIS DSP Library
    00008 * Title:        arm_min_f32.c
    00009 *
    00010 * Description:  Minimum value of two floating point arrays.
    00011 *
    00012 * Target Processor: Cortex-M4/Cortex-M3
    00013 *
    00014 * Version 1.0.3 2010/11/29
    00015 *    Re-organized the CMSIS folders and updated documentation.
    00016 *
    00017 * Version 1.0.2 2010/11/11
    00018 *    Documentation updated.
    00019 *
    00020 * Version 1.0.1 2010/10/05
    00021 *    Production release and review comments incorporated.
    00022 *
    00023 * Version 1.0.0 2010/09/20
    00024 *    Production release and review comments incorporated.
    00025 * ---------------------------------------------------------------------------- */
    00026
    00027 #include "arm_math.h"
    00028
    00057 void arm_min_f32(
    00058   float32_t * pSrc,
    00059   uint32_t blockSize,
    00060   float32_t * pResult,
    00061   uint32_t * pIndex)
    00062 {
    00063   float32_t minVal, out;                         /* Temporary variables to store the output value. */
    00064   uint32_t blkCnt, outIndex;                     /* loop counter */
    00065
    00066   /* Initialise the index value to zero. */
    00067   outIndex = 0u;
    00068   /* Load first input value that act as reference value for comparision */
    00069   out = *pSrc++;
    00070
    00071   /* Loop over blockSize number of values */
    00072   blkCnt = (blockSize - 1u);
    00073
    00074   do
    00075   {
    00076     /* Initialize minVal to the next consecutive values one by one */
    00077     minVal = *pSrc++;
    00078
    00079     /* compare for the minimum value */
    00080     if(out > minVal)
    00081     {
    00082       /* Update the minimum value and it's index */
    00083       out = minVal;
    00084       outIndex = blockSize - blkCnt;
    00085     }
    00086
    00087     blkCnt--;
    00088
    00089   } while(blkCnt > 0u);
    00090
    00091   /* Store the minimum value and it's index into destination pointers */
    00092   *pResult = out;
    00093   *pIndex = outIndex;
    00094 }
    00095

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