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Official ARM version: v5.6.0

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This commit is contained in:
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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51
DSP/Source/FastMathFunctions/CMakeLists.txt Normal file
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@ -0,0 +1,51 @@
cmake_minimum_required (VERSION 3.6)
project(CMSISDSPFastMath)
file(GLOB SRC "./*_*.c")
add_library(CMSISDSPFastMath STATIC)
include(interpol)
interpol(CMSISDSPFastMath)
if (CONFIGTABLE AND ALLFAST)
target_compile_definitions(CMSISDSPFastMath PUBLIC ARM_ALL_FAST_TABLES)
endif()
if (NOT CONFIGTABLE OR ALLFAST OR ARM_COS_F32)
target_sources(CMSISDSPFastMath PRIVATE arm_cos_f32.c)
endif()
if (NOT CONFIGTABLE OR ALLFAST OR ARM_COS_Q15)
target_sources(CMSISDSPFastMath PRIVATE arm_cos_q15.c)
endif()
if (NOT CONFIGTABLE OR ALLFAST OR ARM_COS_Q31)
target_sources(CMSISDSPFastMath PRIVATE arm_cos_q31.c)
endif()
if (NOT CONFIGTABLE OR ALLFAST OR ARM_SIN_F32)
target_sources(CMSISDSPFastMath PRIVATE arm_sin_f32.c)
endif()
if (NOT CONFIGTABLE OR ALLFAST OR ARM_SIN_Q15)
target_sources(CMSISDSPFastMath PRIVATE arm_sin_q15.c)
endif()
if (NOT CONFIGTABLE OR ALLFAST OR ARM_SIN_Q31)
target_sources(CMSISDSPFastMath PRIVATE arm_sin_q31.c)
endif()
target_sources(CMSISDSPFastMath PRIVATE arm_sqrt_q15.c)
target_sources(CMSISDSPFastMath PRIVATE arm_sqrt_q31.c)
configdsp(CMSISDSPFastMath ..)
### Includes
target_include_directories(CMSISDSPFastMath PUBLIC "${DSP}/../../Include")

37
DSP/Source/FastMathFunctions/FastMathFunctions.c Normal file
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@ -0,0 +1,37 @@
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: FastMathFunctions.c
* Description: Combination of all fast math function source files.
*
* $Date: 18. March 2019
* $Revision: V1.0.0
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2019 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_cos_f32.c"
#include "arm_cos_q15.c"
#include "arm_cos_q31.c"
#include "arm_sin_f32.c"
#include "arm_sin_q15.c"
#include "arm_sin_q31.c"
#include "arm_sqrt_q15.c"
#include "arm_sqrt_q31.c"

85
DSP/Source/FastMathFunctions/arm_cos_f32.c
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@ -3,13 +3,13 @@
* Title: arm_cos_f32.c
* Description: Fast cosine calculation for floating-point values
*
* $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
*
@ -28,56 +28,57 @@
#include "arm_math.h"
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
@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>
*/
@defgroup cos Cosine
/**
* @addtogroup cos
* @{
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 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];
c = Table[index+1];
</pre>
*/
/**
* @brief Fast approximation to the trigonometric cosine function for floating-point data.
* @param[in] x input value in radians.
* @return cos(x).
@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 */
float32_t cosVal, fract, in; /* Temporary input, output variables */
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 */
/* Scale 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 */
@ -93,8 +94,14 @@ float32_t arm_cos_f32(
in = in - (float32_t) n;
/* Calculation of index of the table */
findex = (float32_t) FAST_MATH_TABLE_SIZE * in;
index = ((uint16_t)findex) & 0x1ff;
findex = (float32_t)FAST_MATH_TABLE_SIZE * in;
index = (uint16_t)findex;
/* when "in" is exactly 1, we need to rotate the index down to 0 */
if (index >= FAST_MATH_TABLE_SIZE) {
index = 0;
findex -= (float32_t)FAST_MATH_TABLE_SIZE;
}
/* fractional value calculation */
fract = findex - (float32_t) index;
@ -104,12 +111,12 @@ float32_t arm_cos_f32(
b = sinTable_f32[index+1];
/* Linear interpolation process */
cosVal = (1.0f-fract)*a + fract*b;
cosVal = (1.0f - fract) * a + fract * b;
/* Return the output value */
/* Return output value */
return (cosVal);
}
/**
* @} end of cos group
@} end of cos group
*/

48
DSP/Source/FastMathFunctions/arm_cos_q15.c
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@ -3,13 +3,13 @@
* Title: arm_cos_q15.c
* Description: Fast cosine calculation for Q15 values
*
* $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
*
@ -30,36 +30,35 @@
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup cos
* @{
@ingroup groupFastMath
*/
/**
* @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).
@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 cosVal; /* Temporary input, output variables */
int32_t index; /* Index variable */
q15_t a, b; /* Two 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;
{ /* convert negative numbers to corresponding positive ones */
x = (uint16_t)x + 0x8000;
}
/* Calculate the nearest index */
@ -73,12 +72,13 @@ q15_t arm_cos_q15(
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);
cosVal = (q31_t) (0x8000 - fract) * a >> 16;
cosVal = (q15_t) ((((q31_t) cosVal << 16) + ((q31_t) fract * b)) >> 16);
return cosVal << 1;
/* Return output value */
return (cosVal << 1);
}
/**
* @} end of cos group
@} end of cos group
*/

48
DSP/Source/FastMathFunctions/arm_cos_q31.c
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@ -3,13 +3,13 @@
* Title: arm_cos_q31.c
* Description: Fast cosine calculation for Q31 values
*
* $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
*
@ -30,36 +30,35 @@
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup cos
* @{
@ingroup groupFastMath
*/
/**
* @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).
@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 cosVal; /* Temporary input, output variables */
int32_t index; /* Index variable */
q31_t a, b; /* Two 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;
{ /* convert negative numbers to corresponding positive ones */
x = (uint32_t)x + 0x80000000;
}
/* Calculate the nearest index */
@ -73,12 +72,13 @@ q31_t arm_cos_q31(
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);
cosVal = (q63_t) (0x80000000 - fract) * a >> 32;
cosVal = (q31_t) ((((q63_t) cosVal << 32) + ((q63_t) fract * b)) >> 32);
return cosVal << 1;
/* Return output value */
return (cosVal << 1);
}
/**
* @} end of cos group
@} end of cos group
*/

91
DSP/Source/FastMathFunctions/arm_sin_f32.c
View file

@ -3,13 +3,13 @@
* Title: arm_sin_f32.c
* Description: Fast sine calculation for floating-point values
*
* $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
*
@ -28,70 +28,64 @@
#include "arm_math.h"
#include "arm_common_tables.h"
#include <math.h>
/**
* @ingroup groupFastMath
@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>
@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 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];
c = Table[index+1];
</pre>
*/
/**
* @addtogroup sin
* @{
@addtogroup sin
@{
*/
/**
* @brief Fast approximation to the trigonometric sine function for floating-point data.
* @param[in] x input value in radians.
* @return sin(x).
@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 */
float32_t sinVal, fract, in; /* Temporary input, output variables */
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 */
/* Scale 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)
if (in < 0.0f)
{
n--;
}
@ -100,9 +94,14 @@ float32_t arm_sin_f32(
in = in - (float32_t) n;
/* Calculation of index of the table */
findex = (float32_t) FAST_MATH_TABLE_SIZE * in;
findex = (float32_t)FAST_MATH_TABLE_SIZE * in;
index = (uint16_t)findex;
index = ((uint16_t)findex) & 0x1ff;
/* when "in" is exactly 1, we need to rotate the index down to 0 */
if (index >= FAST_MATH_TABLE_SIZE) {
index = 0;
findex -= (float32_t)FAST_MATH_TABLE_SIZE;
}
/* fractional value calculation */
fract = findex - (float32_t) index;
@ -112,12 +111,12 @@ float32_t arm_sin_f32(
b = sinTable_f32[index+1];
/* Linear interpolation process */
sinVal = (1.0f-fract)*a + fract*b;
sinVal = (1.0f - fract) * a + fract * b;
/* Return the output value */
/* Return output value */
return (sinVal);
}
/**
* @} end of sin group
@} end of sin group
*/

43
DSP/Source/FastMathFunctions/arm_sin_q15.c
View file

@ -3,13 +3,13 @@
* Title: arm_sin_q15.c
* Description: Fast sine calculation for Q15 values
*
* $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
*
@ -30,28 +30,28 @@
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup sin
* @{
@ingroup groupFastMath
*/
/**
* @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).
@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 sinVal; /* Temporary input, output variables */
int32_t index; /* Index variable */
q15_t a, b; /* Two nearest output values */
q15_t fract; /* Temporary values for fractional values */
/* Calculate the nearest index */
@ -65,12 +65,13 @@ q15_t arm_sin_q15(
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);
sinVal = (q31_t) (0x8000 - fract) * a >> 16;
sinVal = (q15_t) ((((q31_t) sinVal << 16) + ((q31_t) fract * b)) >> 16);
return sinVal << 1;
/* Return output value */
return (sinVal << 1);
}
/**
* @} end of sin group
@} end of sin group
*/

42
DSP/Source/FastMathFunctions/arm_sin_q31.c
View file

@ -3,13 +3,13 @@
* Title: arm_sin_q31.c
* Description: Fast sine calculation for Q31 values
*
* $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
*
@ -30,27 +30,28 @@
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
*/
/**
* @addtogroup sin
* @{
@ingroup groupFastMath
*/
/**
* @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). */
@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 */
int32_t index; /* Index variable */
q31_t a, b; /* Two nearest output values */
q31_t fract; /* Temporary values for fractional values */
/* Calculate the nearest index */
@ -64,12 +65,13 @@ q31_t arm_sin_q31(
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);
sinVal = (q63_t) (0x80000000 - fract) * a >> 32;
sinVal = (q31_t) ((((q63_t) sinVal << 32) + ((q63_t) fract * b)) >> 32);
return sinVal << 1;
/* Return output value */
return (sinVal << 1);
}
/**
* @} end of sin group
@} end of sin group
*/

36
DSP/Source/FastMathFunctions/arm_sqrt_q15.c
View file

@ -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
*/

38
DSP/Source/FastMathFunctions/arm_sqrt_q31.c
View file

@ -3,13 +3,13 @@
* Title: arm_sqrt_q31.c
* Description: Q31 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
*
@ -30,33 +30,34 @@
#include "arm_common_tables.h"
/**
* @ingroup groupFastMath
@ingroup groupFastMath
*/
/**
* @addtogroup SQRT
* @{
@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.
@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 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_q31(
q31_t in,
q31_t * pOut)
{
q31_t number, temp1, bits_val1, var1, signBits1, half;
q31_t bits_val1;
q31_t number, temp1, var1, signBits1, half;
float32_t temp_float1;
union
{
q31_t fracval;
float32_t floatval;
q31_t fracval;
float32_t floatval;
} tempconv;
number = in;
@ -81,9 +82,9 @@ arm_status arm_sqrt_q31(
/* Store the number for later use */
temp1 = number;
/*Convert to float */
/* Convert to float */
temp_float1 = number * 4.6566128731e-010f;
/*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 */
@ -133,10 +134,11 @@ arm_status arm_sqrt_q31(
else
{
*pOut = 0;
return (ARM_MATH_ARGUMENT_ERROR);
}
}
/**
* @} end of SQRT group
@} end of SQRT group
*/