Subversion Repositories DashDisplay

Rev

Rev 28 | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /* ----------------------------------------------------------------------    
  2. * Copyright (C) 2010-2014 ARM Limited. All rights reserved.    
  3. *    
  4. * $Date:        19. March 2015
  5. * $Revision:    V.1.4.5  
  6. *    
  7. * Project:          CMSIS DSP Library    
  8. * Title:                arm_fill_f32.c    
  9. *    
  10. * Description:  Fills a constant value into a floating-point vector.  
  11. *    
  12. * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
  13. *  
  14. * Redistribution and use in source and binary forms, with or without
  15. * modification, are permitted provided that the following conditions
  16. * are met:
  17. *   - Redistributions of source code must retain the above copyright
  18. *     notice, this list of conditions and the following disclaimer.
  19. *   - Redistributions in binary form must reproduce the above copyright
  20. *     notice, this list of conditions and the following disclaimer in
  21. *     the documentation and/or other materials provided with the
  22. *     distribution.
  23. *   - Neither the name of ARM LIMITED nor the names of its contributors
  24. *     may be used to endorse or promote products derived from this
  25. *     software without specific prior written permission.
  26. *
  27. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  30. * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  31. * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  32. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  33. * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  34. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  35. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  37. * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38. * POSSIBILITY OF SUCH DAMAGE.    
  39. * ---------------------------------------------------------------------------- */
  40.  
  41. #include "arm_math.h"
  42.  
  43. /**    
  44.  * @ingroup groupSupport    
  45.  */
  46.  
  47. /**    
  48.  * @defgroup Fill Vector Fill    
  49.  *    
  50.  * Fills the destination vector with a constant value.    
  51.  *    
  52.  * <pre>    
  53.  *      pDst[n] = value;   0 <= n < blockSize.    
  54.  * </pre>    
  55.  *  
  56.  * There are separate functions for floating point, Q31, Q15, and Q7 data types.    
  57.  */
  58.  
  59. /**    
  60.  * @addtogroup Fill    
  61.  * @{    
  62.  */
  63.  
  64. /**    
  65.  * @brief Fills a constant value into a floating-point vector.    
  66.  * @param[in]       value input value to be filled  
  67.  * @param[out]      *pDst points to output vector    
  68.  * @param[in]       blockSize length of the output vector  
  69.  * @return none.    
  70.  *    
  71.  */
  72.  
  73.  
  74. void arm_fill_f32(
  75.   float32_t value,
  76.   float32_t * pDst,
  77.   uint32_t blockSize)
  78. {
  79.   uint32_t blkCnt;                               /* loop counter */
  80.  
  81. #ifndef ARM_MATH_CM0_FAMILY
  82.  
  83.   /* Run the below code for Cortex-M4 and Cortex-M3 */
  84.   float32_t in1 = value;
  85.   float32_t in2 = value;
  86.   float32_t in3 = value;
  87.   float32_t in4 = value;
  88.  
  89.   /*loop Unrolling */
  90.   blkCnt = blockSize >> 2u;
  91.  
  92.   /* First part of the processing with loop unrolling.  Compute 4 outputs at a time.    
  93.    ** a second loop below computes the remaining 1 to 3 samples. */
  94.   while(blkCnt > 0u)
  95.   {
  96.     /* C = value */
  97.     /* Fill the value in the destination buffer */
  98.     *pDst++ = in1;
  99.     *pDst++ = in2;
  100.     *pDst++ = in3;
  101.     *pDst++ = in4;
  102.  
  103.     /* Decrement the loop counter */
  104.     blkCnt--;
  105.   }
  106.  
  107.   /* If the blockSize is not a multiple of 4, compute any remaining output samples here.    
  108.    ** No loop unrolling is used. */
  109.   blkCnt = blockSize % 0x4u;
  110.  
  111. #else
  112.  
  113.   /* Run the below code for Cortex-M0 */
  114.  
  115.   /* Loop over blockSize number of values */
  116.   blkCnt = blockSize;
  117.  
  118. #endif /* #ifndef ARM_MATH_CM0_FAMILY */
  119.  
  120.  
  121.   while(blkCnt > 0u)
  122.   {
  123.     /* C = value */
  124.     /* Fill the value in the destination buffer */
  125.     *pDst++ = value;
  126.  
  127.     /* Decrement the loop counter */
  128.     blkCnt--;
  129.   }
  130. }
  131.  
  132. /**    
  133.  * @} end of Fill group    
  134.  */
  135.