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/* ----------------------------------------------------------------------
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* Copyright (C) 2010 ARM Limited. All rights reserved.
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*
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* $Date: 29. November 2010
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* $Revision: V1.0.3
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*
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* Project: CMSIS DSP Library
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* Title: arm_fill_q7.c
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*
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* Description: Processing function for the Q7 fill
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*
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* Target Processor: Cortex-M4/Cortex-M3
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*
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* Version 1.0.3 2010/11/29
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* Re-organized the CMSIS folders and updated documentation.
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*
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* Version 1.0.2 2010/11/11
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* Documentation updated.
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*
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* Version 1.0.1 2010/10/05
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* Production release and review comments incorporated.
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*
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* Version 1.0.0 2010/09/20
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* Production release and review comments incorporated.
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*
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* Version 0.0.7 2010/06/10
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* Misra-C changes done
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* -------------------------------------------------------------------- */
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#include "arm_math.h"
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/**
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* @ingroup groupSupport
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*/
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/**
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* @addtogroup Fill
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* @{
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*/
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/**
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* @brief Fills a constant value into a Q7 vector.
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* @param[in] value input value to be filled
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* @param[out] *pDst points to output vector
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* @param[in] blockSize length of the output vector
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* @return none.
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*
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*/
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void arm_fill_q7(
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q7_t value,
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q7_t * pDst,
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uint32_t blockSize)
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{
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uint32_t blkCnt; /* loop counter */
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q31_t packedValue; /* value packed to 32 bits */
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/*loop Unrolling */
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blkCnt = blockSize >> 2u;
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/* Packing four 8 bit values to 32 bit value in order to use SIMD */
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packedValue = __PACKq7(value, value, value, value);
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/* First part of the processing with loop unrolling. Compute 4 outputs at a time.
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** a second loop below computes the remaining 1 to 3 samples. */
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while(blkCnt > 0u)
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{
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/* C = value */
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/* Fill the value in the destination buffer */
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*__SIMD32(pDst)++ = packedValue;
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/* Decrement the loop counter */
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blkCnt--;
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}
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/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
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** No loop unrolling is used. */
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blkCnt = blockSize % 0x4u;
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while(blkCnt > 0u)
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{
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/* C = value */
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/* Fill the value in the destination buffer */
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*pDst++ = value;
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/* Decrement the loop counter */
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blkCnt--;
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}
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}
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/**
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* @} end of Fill group
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*/
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