- Main Page
- Modules
- Data Structures
- Files
- Examples

- File List
- Globals

# arm_max_f32.c

Go to the documentation of this file.

    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_max_f32.c
    00009 *
    00010 * Description:  Maximum value of a floating-point vector.
    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
    00056 void arm_max_f32(
    00057   float32_t * pSrc,
    00058   uint32_t blockSize,
    00059   float32_t * pResult,
    00060   uint32_t * pIndex)
    00061 {
    00062   float32_t maxVal, out;                         /* Temporary variables to store the output value. */
    00063   uint32_t blkCnt, outIndex;                     /* loop counter */
    00064
    00065   /* Initialise the index value to zero. */
    00066   outIndex = 0u;
    00067   /* Load first input value that act as reference value for comparision */
    00068   out = *pSrc++;
    00069
    00070   /* Loop over blockSize number of values */
    00071   blkCnt = (blockSize - 1u);
    00072
    00073   do
    00074   {
    00075     /* Initialize maxVal to the next consecutive values one by one */
    00076     maxVal = *pSrc++;
    00077
    00078     /* compare for the maximum value */
    00079     if(out < maxVal)
    00080     {
    00081       /* Update the maximum value and it's index */
    00082       out = maxVal;
    00083       outIndex = blockSize - blkCnt;
    00084     }
    00085
    00086     blkCnt--;
    00087
    00088   } while(blkCnt > 0u);
    00089
    00090   /* Store the maximum value and it's index into destination pointers */
    00091   *pResult = out;
    00092   *pIndex = outIndex;
    00093 }
    00094

All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Defines