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/* ----------------------------------------------------------------------    
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/* ----------------------------------------------------------------------    
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* Copyright (C) 2010-2014 ARM Limited. All rights reserved.  
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* Copyright (C) 2010-2014 ARM Limited. All rights reserved.  
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*    
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*    
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* $Date:        19. March 2015
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* $Date:        19. October 2015
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* $Revision:    V.1.4.5
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* $Revision:    V.1.4.5 a
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*    
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*    
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* Project:      CMSIS DSP Library  
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* Project:      CMSIS DSP Library  
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* Title:                arm_sqrt_q15.c    
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* Title:                arm_sqrt_q15.c    
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*    
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*    
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* Description:  Q15 square root function.    
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* Description:  Q15 square root function.    
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    /* Calculate half value of the number */
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    /* Calculate half value of the number */
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    half = number >> 1;
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    half = number >> 1;
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    /* Store the number for later use */
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    /* Store the number for later use */
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    temp1 = number;
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    temp1 = number;
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    /*Convert to float */
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    /* Convert to float */
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    temp_float1 = number * 3.051757812500000e-005f;
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    temp_float1 = number * 3.051757812500000e-005f;
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    /*Store as integer */
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    /*Store as integer */
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    tempconv.floatval = temp_float1;
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    tempconv.floatval = temp_float1;
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    bits_val1 = tempconv.fracval;
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    bits_val1 = tempconv.fracval;
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    /* Subtract the shifted value from the magic number to give intial guess */
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    /* Subtract the shifted value from the magic number to give intial guess */
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    bits_val1 = 0x5f3759df - (bits_val1 >> 1);  // gives initial guess  
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    bits_val1 = 0x5f3759df - (bits_val1 >> 1);  /* gives initial guess */
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    /* Store as float */
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    /* Store as float */
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    tempconv.fracval = bits_val1;
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    tempconv.fracval = bits_val1;
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    temp_float1 = tempconv.floatval;
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    temp_float1 = tempconv.floatval;
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    /* Convert to integer format */
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    /* Convert to integer format */
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    var1 = (q31_t) (temp_float1 * 16384);
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    var1 = (q31_t) (temp_float1 * 16384);