CMSIS DSP Software Library: arm_fill_q31.c Source File

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# arm_fill_q31.c

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    00001 /* ----------------------------------------------------------------------
    00002 * Copyright (C) 2010 ARM Limited. All rights reserved.
    00003 *
    00004 * $Date:        15. July 2011
    00005 * $Revision:    V1.0.10
    00006 *
    00007 * Project:      CMSIS DSP Library
    00008 * Title:        arm_fill_q31.c
    00009 *
    00010 * Description:  Fills a constant value into a Q31 vector.
    00011 *
    00012 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
    00013 *
    00014 * Version 1.0.10 2011/7/15
    00015 *    Big Endian support added and Merged M0 and M3/M4 Source code.
    00016 *
    00017 * Version 1.0.3 2010/11/29
    00018 *    Re-organized the CMSIS folders and updated documentation.
    00019 *
    00020 * Version 1.0.2 2010/11/11
    00021 *    Documentation updated.
    00022 *
    00023 * Version 1.0.1 2010/10/05
    00024 *    Production release and review comments incorporated.
    00025 *
    00026 * Version 1.0.0 2010/09/20
    00027 *    Production release and review comments incorporated.
    00028 *
    00029 * Version 0.0.7  2010/06/10
    00030 *    Misra-C changes done
    00031 * -------------------------------------------------------------------- */
    00032
    00033 #include "arm_math.h"
    00034
    00053 void arm_fill_q31(
    00054   q31_t value,
    00055   q31_t * pDst,
    00056   uint32_t blockSize)
    00057 {
    00058   uint32_t blkCnt;                               /* loop counter */
    00059
    00060
    00061 #ifndef ARM_MATH_CM0
    00062
    00063   /* Run the below code for Cortex-M4 and Cortex-M3 */
    00064
    00065   /*loop Unrolling */
    00066   blkCnt = blockSize >> 2u;
    00067
    00068   /* First part of the processing with loop unrolling.  Compute 4 outputs at a time.
    00069    ** a second loop below computes the remaining 1 to 3 samples. */
    00070   while(blkCnt > 0u)
    00071   {
    00072     /* C = value */
    00073     /* Fill the value in the destination buffer */
    00074     *pDst++ = value;
    00075     *pDst++ = value;
    00076     *pDst++ = value;
    00077     *pDst++ = value;
    00078
    00079     /* Decrement the loop counter */
    00080     blkCnt--;
    00081   }
    00082
    00083   /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
    00084    ** No loop unrolling is used. */
    00085   blkCnt = blockSize % 0x4u;
    00086
    00087 #else
    00088
    00089   /* Run the below code for Cortex-M0 */
    00090
    00091   /* Loop over blockSize number of values */
    00092   blkCnt = blockSize;
    00093
    00094 #endif /* #ifndef ARM_MATH_CM0 */
    00095
    00096   while(blkCnt > 0u)
    00097   {
    00098     /* C = value */
    00099     /* Fill the value in the destination buffer */
    00100     *pDst++ = value;
    00101
    00102     /* Decrement the loop counter */
    00103     blkCnt--;
    00104   }
    00105 }
    00106

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