youmetme/UAV
Archived
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

init

Browse Source
This commit is contained in:
你遇了我
2023-10-03 16:40:14 +08:00
commit df1cef55ca
1022 changed files with 487241 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

115
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_f32.c Normal file
View File

@@ -0,0 +1,115 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_cos_f32.c
* Description: Fast cosine calculation for floating-point values
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @defgroup cos Cosine
*
* Computes the trigonometric cosine function using a combination of table lookup
* and linear interpolation. There are separate functions for
* Q15, Q31, and floating-point data types.
* The input to the floating-point version is in radians and in the range [0 2*pi) while the
* fixed-point Q15 and Q31 have a scaled input with the range
* [0 +0.9999] mapping to [0 2*pi). The fixed-point range is chosen so that a
* value of 2*pi wraps around to 0.
*
* The implementation is based on table lookup using 256 values together with linear interpolation.
* The steps used are:
* -# Calculation of the nearest integer table index
* -# Compute the fractional portion (fract) of the table index.
* -# The final result equals <code>(1.0f-fract)*a + fract*b;</code>
*
* where
* <pre>
* b=Table[index+0];
* c=Table[index+1];
* </pre>
*/
/**
* @addtogroup cos
* @{
*/
/**
* @brief Fast approximation to the trigonometric cosine function for floating-point data.
* @param[in] x input value in radians.
* @return cos(x).
*/
float32_t arm_cos_f32(
float32_t x)
{
float32_t cosVal, fract, in; /* Temporary variables for input, output */
uint16_t index; /* Index variable */
float32_t a, b; /* Two nearest output values */
int32_t n;
float32_t findex;
/* input x is in radians */
/* Scale the input to [0 1] range from [0 2*PI] , divide input by 2*pi, add 0.25 (pi/2) to read sine table */
in = x * 0.159154943092f + 0.25f;
/* Calculation of floor value of input */
n = (int32_t) in;
/* Make negative values towards -infinity */
if (in < 0.0f)
{
n--;
}
/* Map input value to [0 1] */
in = in - (float32_t) n;
/* Calculation of index of the table */
findex = (float32_t) FAST_MATH_TABLE_SIZE * in;
index = ((uint16_t)findex) & 0x1ff;
/* fractional value calculation */
fract = findex - (float32_t) index;
/* Read two nearest values of input value from the cos table */
a = sinTable_f32[index];
b = sinTable_f32[index+1];
/* Linear interpolation process */
cosVal = (1.0f-fract)*a + fract*b;
/* Return the output value */
return (cosVal);
}
/**
* @} end of cos group
*/

84
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_q15.c Normal file
View File

@@ -0,0 +1,84 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_cos_q15.c
* Description: Fast cosine calculation for Q15 values
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup cos
* @{
*/
/**
* @brief Fast approximation to the trigonometric cosine function for Q15 data.
* @param[in] x Scaled input value in radians.
* @return cos(x).
*
* The Q15 input value is in the range [0 +0.9999] and is mapped to a radian
* value in the range [0 2*pi).
*/
q15_t arm_cos_q15(
q15_t x)
{
q15_t cosVal; /* Temporary variables for input, output */
int32_t index; /* Index variables */
q15_t a, b; /* Four nearest output values */
q15_t fract; /* Temporary values for fractional values */
/* add 0.25 (pi/2) to read sine table */
x = (uint16_t)x + 0x2000;
if (x < 0)
{ /* convert negative numbers to corresponding positive ones */
x = (uint16_t)x + 0x8000;
}
/* Calculate the nearest index */
index = (uint32_t)x >> FAST_MATH_Q15_SHIFT;
/* Calculation of fractional value */
fract = (x - (index << FAST_MATH_Q15_SHIFT)) << 9;
/* Read two nearest values of input value from the sin table */
a = sinTable_q15[index];
b = sinTable_q15[index+1];
/* Linear interpolation process */
cosVal = (q31_t)(0x8000-fract)*a >> 16;
cosVal = (q15_t)((((q31_t)cosVal << 16) + ((q31_t)fract*b)) >> 16);
return cosVal << 1;
}
/**
* @} end of cos group
*/

84
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_q31.c Normal file
View File

@@ -0,0 +1,84 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_cos_q31.c
* Description: Fast cosine calculation for Q31 values
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup cos
* @{
*/
/**
* @brief Fast approximation to the trigonometric cosine function for Q31 data.
* @param[in] x Scaled input value in radians.
* @return cos(x).
*
* The Q31 input value is in the range [0 +0.9999] and is mapped to a radian
* value in the range [0 2*pi).
*/
q31_t arm_cos_q31(
q31_t x)
{
q31_t cosVal; /* Temporary variables for input, output */
int32_t index; /* Index variables */
q31_t a, b; /* Four nearest output values */
q31_t fract; /* Temporary values for fractional values */
/* add 0.25 (pi/2) to read sine table */
x = (uint32_t)x + 0x20000000;
if (x < 0)
{ /* convert negative numbers to corresponding positive ones */
x = (uint32_t)x + 0x80000000;
}
/* Calculate the nearest index */
index = (uint32_t)x >> FAST_MATH_Q31_SHIFT;
/* Calculation of fractional value */
fract = (x - (index << FAST_MATH_Q31_SHIFT)) << 9;
/* Read two nearest values of input value from the sin table */
a = sinTable_q31[index];
b = sinTable_q31[index+1];
/* Linear interpolation process */
cosVal = (q63_t)(0x80000000-fract)*a >> 32;
cosVal = (q31_t)((((q63_t)cosVal << 32) + ((q63_t)fract*b)) >> 32);
return cosVal << 1;
}
/**
* @} end of cos group
*/

123
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_f32.c Normal file
View File

@@ -0,0 +1,123 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_sin_f32.c
* Description: Fast sine calculation for floating-point values
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
#include <math.h>
/**
* @ingroup groupFastMath
*/
/**
* @defgroup sin Sine
*
* Computes the trigonometric sine function using a combination of table lookup
* and linear interpolation. There are separate functions for
* Q15, Q31, and floating-point data types.
* The input to the floating-point version is in radians and in the range [0 2*pi) while the
* fixed-point Q15 and Q31 have a scaled input with the range
* [0 +0.9999] mapping to [0 2*pi). The fixed-point range is chosen so that a
* value of 2*pi wraps around to 0.
*
* The implementation is based on table lookup using 256 values together with linear interpolation.
* The steps used are:
* -# Calculation of the nearest integer table index
* -# Compute the fractional portion (fract) of the table index.
* -# The final result equals <code>(1.0f-fract)*a + fract*b;</code>
*
* where
* <pre>
* b=Table[index+0];
* c=Table[index+1];
* </pre>
*/
/**
* @addtogroup sin
* @{
*/
/**
* @brief Fast approximation to the trigonometric sine function for floating-point data.
* @param[in] x input value in radians.
* @return sin(x).
*/
float32_t arm_sin_f32(
float32_t x)
{
float32_t sinVal, fract, in; /* Temporary variables for input, output */
uint16_t index; /* Index variable */
float32_t a, b; /* Two nearest output values */
int32_t n;
float32_t findex;
/* Special case for small negative inputs */
if ((x < 0.0f) && (x >= -1.9e-7f)) {
return x;
}
/* input x is in radians */
/* Scale the input to [0 1] range from [0 2*PI] , divide input by 2*pi */
in = x * 0.159154943092f;
/* Calculation of floor value of input */
n = (int32_t) in;
/* Make negative values towards -infinity */
if (x < 0.0f)
{
n--;
}
/* Map input value to [0 1] */
in = in - (float32_t) n;
/* Calculation of index of the table */
findex = (float32_t) FAST_MATH_TABLE_SIZE * in;
index = ((uint16_t)findex) & 0x1ff;
/* fractional value calculation */
fract = findex - (float32_t) index;
/* Read two nearest values of input value from the sin table */
a = sinTable_f32[index];
b = sinTable_f32[index+1];
/* Linear interpolation process */
sinVal = (1.0f-fract)*a + fract*b;
/* Return the output value */
return (sinVal);
}
/**
* @} end of sin group
*/

76
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_q15.c Normal file
View File

@@ -0,0 +1,76 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_sin_q15.c
* Description: Fast sine calculation for Q15 values
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup sin
* @{
*/
/**
* @brief Fast approximation to the trigonometric sine function for Q15 data.
* @param[in] x Scaled input value in radians.
* @return sin(x).
*
* The Q15 input value is in the range [0 +0.9999] and is mapped to a radian value in the range [0 2*pi).
*/
q15_t arm_sin_q15(
q15_t x)
{
q15_t sinVal; /* Temporary variables for input, output */
int32_t index; /* Index variables */
q15_t a, b; /* Four nearest output values */
q15_t fract; /* Temporary values for fractional values */
/* Calculate the nearest index */
index = (uint32_t)x >> FAST_MATH_Q15_SHIFT;
/* Calculation of fractional value */
fract = (x - (index << FAST_MATH_Q15_SHIFT)) << 9;
/* Read two nearest values of input value from the sin table */
a = sinTable_q15[index];
b = sinTable_q15[index+1];
/* Linear interpolation process */
sinVal = (q31_t)(0x8000-fract)*a >> 16;
sinVal = (q15_t)((((q31_t)sinVal << 16) + ((q31_t)fract*b)) >> 16);
return sinVal << 1;
}
/**
* @} end of sin group
*/

75
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sin_q31.c Normal file
View File

@@ -0,0 +1,75 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_sin_q31.c
* Description: Fast sine calculation for Q31 values
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup sin
* @{
*/
/**
* @brief Fast approximation to the trigonometric sine function for Q31 data.
* @param[in] x Scaled input value in radians.
* @return sin(x).
*
* The Q31 input value is in the range [0 +0.9999] and is mapped to a radian value in the range [0 2*pi). */
q31_t arm_sin_q31(
q31_t x)
{
q31_t sinVal; /* Temporary variables for input, output */
int32_t index; /* Index variables */
q31_t a, b; /* Four nearest output values */
q31_t fract; /* Temporary values for fractional values */
/* Calculate the nearest index */
index = (uint32_t)x >> FAST_MATH_Q31_SHIFT;
/* Calculation of fractional value */
fract = (x - (index << FAST_MATH_Q31_SHIFT)) << 9;
/* Read two nearest values of input value from the sin table */
a = sinTable_q31[index];
b = sinTable_q31[index+1];
/* Linear interpolation process */
sinVal = (q63_t)(0x80000000-fract)*a >> 32;
sinVal = (q31_t)((((q63_t)sinVal << 32) + ((q63_t)fract*b)) >> 32);
return sinVal << 1;
}
/**
* @} end of sin group
*/

144
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q15.c Normal file
View File

@@ -0,0 +1,144 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_sqrt_q15.c
* Description: Q15 square root function
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @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.
*/
arm_status arm_sqrt_q15(
q15_t in,
q15_t * pOut)
{
q15_t number, temp1, var1, signBits1, half;
q31_t bits_val1;
float32_t temp_float1;
union
{
q31_t fracval;
float32_t floatval;
} tempconv;
number = in;
/* If the input is a positive number then compute the signBits. */
if (number > 0)
{
signBits1 = __CLZ(number) - 17;
/* Shift by the number of signBits1 */
if ((signBits1 % 2) == 0)
{
number = number << signBits1;
}
else
{
number = number << (signBits1 - 1);
}
/* Calculate half value of the number */
half = number >> 1;
/* Store the number for later use */
temp1 = number;
/* Convert to float */
temp_float1 = number * 3.051757812500000e-005f;
/*Store as integer */
tempconv.floatval = temp_float1;
bits_val1 = tempconv.fracval;
/* Subtract the shifted value from the magic number to give intial guess */
bits_val1 = 0x5f3759df - (bits_val1 >> 1); /* gives initial guess */
/* Store as float */
tempconv.fracval = bits_val1;
temp_float1 = tempconv.floatval;
/* Convert to integer format */
var1 = (q31_t) (temp_float1 * 16384);
/* 1st iteration */
var1 = ((q15_t) ((q31_t) var1 * (0x3000 -
((q15_t)
((((q15_t)
(((q31_t) var1 * var1) >> 15)) *
(q31_t) half) >> 15))) >> 15)) << 2;
/* 2nd iteration */
var1 = ((q15_t) ((q31_t) var1 * (0x3000 -
((q15_t)
((((q15_t)
(((q31_t) var1 * var1) >> 15)) *
(q31_t) half) >> 15))) >> 15)) << 2;
/* 3rd iteration */
var1 = ((q15_t) ((q31_t) var1 * (0x3000 -
((q15_t)
((((q15_t)
(((q31_t) var1 * var1) >> 15)) *
(q31_t) half) >> 15))) >> 15)) << 2;
/* Multiply the inverse square root with the original value */
var1 = ((q15_t) (((q31_t) temp1 * var1) >> 15)) << 1;
/* Shift the output down accordingly */
if ((signBits1 % 2) == 0)
{
var1 = var1 >> (signBits1 / 2);
}
else
{
var1 = var1 >> ((signBits1 - 1) / 2);
}
*pOut = var1;
return (ARM_MATH_SUCCESS);
}
/* If the number is a negative number then store zero as its square root value */
else
{
*pOut = 0;
return (ARM_MATH_ARGUMENT_ERROR);
}
}
/**
* @} end of SQRT group
*/

142
yaokon/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_sqrt_q31.c Normal file
View File

@@ -0,0 +1,142 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_sqrt_q31.c
* Description: Q31 square root function
*
* $Date: 27. January 2017
* $Revision: V.1.5.1
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup SQRT
* @{
*/
/**
* @brief Q31 square root function.
* @param[in] in input value. The range of the input value is [0 +1) or 0x00000000 to 0x7FFFFFFF.
* @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.
*/
arm_status arm_sqrt_q31(
q31_t in,
q31_t * pOut)
{
q31_t number, temp1, bits_val1, var1, signBits1, half;
float32_t temp_float1;
union
{
q31_t fracval;
float32_t floatval;
} tempconv;
number = in;
/* If the input is a positive number then compute the signBits. */
if (number > 0)
{
signBits1 = __CLZ(number) - 1;
/* Shift by the number of signBits1 */
if ((signBits1 % 2) == 0)
{
number = number << signBits1;
}
else
{
number = number << (signBits1 - 1);
}
/* Calculate half value of the number */
half = number >> 1;
/* Store the number for later use */
temp1 = number;
/*Convert to float */
temp_float1 = number * 4.6566128731e-010f;
/*Store as integer */
tempconv.floatval = temp_float1;
bits_val1 = tempconv.fracval;
/* Subtract the shifted value from the magic number to give intial guess */
bits_val1 = 0x5f3759df - (bits_val1 >> 1); /* gives initial guess */
/* Store as float */
tempconv.fracval = bits_val1;
temp_float1 = tempconv.floatval;
/* Convert to integer format */
var1 = (q31_t) (temp_float1 * 1073741824);
/* 1st iteration */
var1 = ((q31_t) ((q63_t) var1 * (0x30000000 -
((q31_t)
((((q31_t)
(((q63_t) var1 * var1) >> 31)) *
(q63_t) half) >> 31))) >> 31)) << 2;
/* 2nd iteration */
var1 = ((q31_t) ((q63_t) var1 * (0x30000000 -
((q31_t)
((((q31_t)
(((q63_t) var1 * var1) >> 31)) *
(q63_t) half) >> 31))) >> 31)) << 2;
/* 3rd iteration */
var1 = ((q31_t) ((q63_t) var1 * (0x30000000 -
((q31_t)
((((q31_t)
(((q63_t) var1 * var1) >> 31)) *
(q63_t) half) >> 31))) >> 31)) << 2;
/* Multiply the inverse square root with the original value */
var1 = ((q31_t) (((q63_t) temp1 * var1) >> 31)) << 1;
/* Shift the output down accordingly */
if ((signBits1 % 2) == 0)
{
var1 = var1 >> (signBits1 / 2);
}
else
{
var1 = var1 >> ((signBits1 - 1) / 2);
}
*pOut = var1;
return (ARM_MATH_SUCCESS);
}
/* If the number is a negative number then store zero as its square root value */
else
{
*pOut = 0;
return (ARM_MATH_ARGUMENT_ERROR);
}
}
/**
* @} end of SQRT group
*/