/* ---------------------------------------------------------------------- * Copyright (C) 2010 ARM Limited. All rights reserved. * * $Date: 15. February 2012 * $Revision: V1.1.0 * * Project: CMSIS DSP Library * Title: arm_fill_f32.c * * Description: Fills a constant value into a floating-point 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. * * Version 0.0.7 2010/06/10 * Misra-C changes done * ---------------------------------------------------------------------------- */ #include "arm_math.h" /** * @ingroup groupSupport */ /** * @defgroup Fill Vector Fill * * Fills the destination vector with a constant value. * *
* pDst[n] = value; 0 <= n < blockSize. ** * There are separate functions for floating point, Q31, Q15, and Q7 data types. */ /** * @addtogroup Fill * @{ */ /** * @brief Fills a constant value into a floating-point vector. * @param[in] value input value to be filled * @param[out] *pDst points to output vector * @param[in] blockSize length of the output vector * @return none. * */ void arm_fill_f32( float32_t value, float32_t * pDst, uint32_t blockSize) { uint32_t blkCnt; /* loop counter */ #ifndef ARM_MATH_CM0 /* Run the below code for Cortex-M4 and Cortex-M3 */ float32_t in1 = value; float32_t in2 = value; float32_t in3 = value; float32_t in4 = value; /*loop Unrolling */ blkCnt = blockSize >> 2u; /* First part of the processing with loop unrolling. Compute 4 outputs at a time. ** a second loop below computes the remaining 1 to 3 samples. */ while(blkCnt > 0u) { /* C = value */ /* Fill the value in the destination buffer */ *pDst++ = in1; *pDst++ = in2; *pDst++ = in3; *pDst++ = in4; /* Decrement the loop counter */ blkCnt--; } /* If the blockSize is not a multiple of 4, compute any remaining output samples here. ** No loop unrolling is used. */ blkCnt = blockSize % 0x4u; #else /* Run the below code for Cortex-M0 */ /* Loop over blockSize number of values */ blkCnt = blockSize; #endif /* #ifndef ARM_MATH_CM0 */ while(blkCnt > 0u) { /* C = value */ /* Fill the value in the destination buffer */ *pDst++ = value; /* Decrement the loop counter */ blkCnt--; } } /** * @} end of Fill group */