diff options
Diffstat (limited to 'DSP_Lib/Source/FastMathFunctions')
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_cos_f32.c | 127 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_cos_q15.c | 96 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_cos_q31.c | 96 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_sin_f32.c | 133 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_sin_q15.c | 88 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_sin_q31.c | 87 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_sqrt_q15.c | 155 | ||||
| -rw-r--r-- | DSP_Lib/Source/FastMathFunctions/arm_sqrt_q31.c | 153 |
8 files changed, 0 insertions, 935 deletions
diff --git a/DSP_Lib/Source/FastMathFunctions/arm_cos_f32.c b/DSP_Lib/Source/FastMathFunctions/arm_cos_f32.c deleted file mode 100644 index 890f37a..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_cos_f32.c +++ /dev/null @@ -1,127 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 21. September 2015 -* $Revision: V.1.4.5 a -* -* Project: CMSIS DSP Library -* Title: arm_cos_f32.c -* -* Description: Fast cosine calculation for floating-point values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#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 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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_cos_q15.c b/DSP_Lib/Source/FastMathFunctions/arm_cos_q15.c deleted file mode 100644 index cb69268..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_cos_q15.c +++ /dev/null @@ -1,96 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 07. September 2015 -* $Revision: V.1.4.5 a -* -* Project: CMSIS DSP Library -* Title: arm_cos_q15.c -* -* Description: Fast cosine calculation for Q15 values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_cos_q31.c b/DSP_Lib/Source/FastMathFunctions/arm_cos_q31.c deleted file mode 100644 index 72c51e6..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_cos_q31.c +++ /dev/null @@ -1,96 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 07. September 2015 -* $Revision: V.1.4.5 a -* -* Project: CMSIS DSP Library -* Title: arm_cos_q31.c -* -* Description: Fast cosine calculation for Q31 values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_sin_f32.c b/DSP_Lib/Source/FastMathFunctions/arm_sin_f32.c deleted file mode 100644 index 8655cf9..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_sin_f32.c +++ /dev/null @@ -1,133 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 21. September 2015 -* $Revision: V.1.4.5 a -* -* Project: CMSIS DSP Library -* Title: arm_sin_f32.c -* -* Description: Fast sine calculation for floating-point values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#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 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; - - /* 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; - if (findex >= 512.0f) { - findex -= 512.0f; - } - - 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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_sin_q15.c b/DSP_Lib/Source/FastMathFunctions/arm_sin_q15.c deleted file mode 100644 index e2209b3..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_sin_q15.c +++ /dev/null @@ -1,88 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_sin_q15.c -* -* Description: Fast sine calculation for Q15 values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_sin_q31.c b/DSP_Lib/Source/FastMathFunctions/arm_sin_q31.c deleted file mode 100644 index 606ab66..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_sin_q31.c +++ /dev/null @@ -1,87 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_sin_q31.c -* -* Description: Fast sine calculation for Q31 values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_sqrt_q15.c b/DSP_Lib/Source/FastMathFunctions/arm_sqrt_q15.c deleted file mode 100644 index 3085dec..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_sqrt_q15.c +++ /dev/null @@ -1,155 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. October 2015 -* $Revision: V.1.4.5 a -* -* Project: CMSIS DSP Library -* Title: arm_sqrt_q15.c -* -* Description: Q15 square root function. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ -#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 - */ diff --git a/DSP_Lib/Source/FastMathFunctions/arm_sqrt_q31.c b/DSP_Lib/Source/FastMathFunctions/arm_sqrt_q31.c deleted file mode 100644 index a9a0bf4..0000000 --- a/DSP_Lib/Source/FastMathFunctions/arm_sqrt_q31.c +++ /dev/null @@ -1,153 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. October 2015 -* $Revision: V.1.4.5 a -* -* Project: CMSIS DSP Library -* Title: arm_sqrt_q31.c -* -* Description: Q31 square root function. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ -#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 - */ |