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Official ARM version: v5.6.0

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rihab kouki 2020-07-28 11:24:49 +01:00
parent 9f95ff5b6b
commit 96d6da4e25
2939 changed files with 339304 additions and 113320 deletions
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36
DSP/Source/FastMathFunctions/arm_sqrt_q15.c
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@ -3,13 +3,13 @@
* Title: arm_sqrt_q15.c
* Description: Q15 square root function
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
* $Date: 18. March 2019
* $Revision: V1.6.0
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
* Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
@ -29,31 +29,30 @@
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
@ingroup groupFastMath
*/
/**
* @addtogroup SQRT
* @{
@addtogroup SQRT
@{
*/
/**
* @brief Q15 square root function.
* @param[in] in input value. The range of the input value is [0 +1) or 0x0000 to 0x7FFF.
* @param[out] *pOut square root of input value.
* @return The function returns ARM_MATH_SUCCESS if the input value is positive
* and ARM_MATH_ARGUMENT_ERROR if the input is negative. For
* negative inputs, the function returns *pOut = 0.
*/
/**
@brief Q15 square root function.
@param[in] in input value. The range of the input value is [0 +1) or 0x0000 to 0x7FFF
@param[out] pOut points to square root of input value
@return execution status
- \ref ARM_MATH_SUCCESS : input value is positive
- \ref ARM_MATH_ARGUMENT_ERROR : input value is negative; *pOut is set to 0
*/
arm_status arm_sqrt_q15(
q15_t in,
q15_t * pOut)
{
q15_t number, temp1, var1, signBits1, half;
q31_t bits_val1;
q15_t number, temp1, var1, signBits1, half;
float32_t temp_float1;
union
{
@ -85,7 +84,7 @@ arm_status arm_sqrt_q15(
/* Convert to float */
temp_float1 = number * 3.051757812500000e-005f;
/*Store as integer */
/* Store as integer */
tempconv.floatval = temp_float1;
bits_val1 = tempconv.fracval;
/* Subtract the shifted value from the magic number to give intial guess */
@ -135,10 +134,11 @@ arm_status arm_sqrt_q15(
else
{
*pOut = 0;
return (ARM_MATH_ARGUMENT_ERROR);
}
}
/**
* @} end of SQRT group
@} end of SQRT group
*/