arm_sin_cos_f32.c
408 lines
| 21.3 KiB
| text/x-c
|
CLexer
r71 | /* ---------------------------------------------------------------------- | |||
* Copyright (C) 2010 ARM Limited. All rights reserved. | ||||
* | ||||
* $Date: 15. July 2011 | ||||
* $Revision: V1.0.10 | ||||
* | ||||
* Project: CMSIS DSP Library | ||||
* Title: arm_sin_cos_f32.c | ||||
* | ||||
* Description: Sine and Cosine calculation for floating-point values. | ||||
* | ||||
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 | ||||
* | ||||
* Version 1.0.10 2011/7/15 | ||||
* Big Endian support added and Merged M0 and M3/M4 Source code. | ||||
* | ||||
* Version 1.0.3 2010/11/29 | ||||
* Re-organized the CMSIS folders and updated documentation. | ||||
* | ||||
* Version 1.0.2 2010/11/11 | ||||
* Documentation updated. | ||||
* | ||||
* Version 1.0.1 2010/10/05 | ||||
* Production release and review comments incorporated. | ||||
* | ||||
* Version 1.0.0 2010/09/20 | ||||
* Production release and review comments incorporated. | ||||
* -------------------------------------------------------------------- */ | ||||
#include "arm_math.h" | ||||
/** | ||||
* @ingroup groupController | ||||
*/ | ||||
/** | ||||
* @defgroup SinCos Sine Cosine | ||||
* | ||||
* Computes the trigonometric sine and cosine values using a combination of table lookup | ||||
* and linear interpolation. | ||||
* There are separate functions for Q31 and floating-point data types. | ||||
* The input to the floating-point version is in degrees while the | ||||
* fixed-point Q31 have a scaled input with the range | ||||
* [-1 1) mapping to [-180 180) degrees. | ||||
* | ||||
* The implementation is based on table lookup using 360 values together with linear interpolation. | ||||
* The steps used are: | ||||
* -# Calculation of the nearest integer table index. | ||||
* -# Compute the fractional portion (fract) of the input. | ||||
* -# Fetch the value corresponding to \c index from sine table to \c y0 and also value from \c index+1 to \c y1. | ||||
* -# Sine value is computed as <code> *psinVal = y0 + (fract * (y1 - y0))</code>. | ||||
* -# Fetch the value corresponding to \c index from cosine table to \c y0 and also value from \c index+1 to \c y1. | ||||
* -# Cosine value is computed as <code> *pcosVal = y0 + (fract * (y1 - y0))</code>. | ||||
*/ | ||||
/** | ||||
* @addtogroup SinCos | ||||
* @{ | ||||
*/ | ||||
/** | ||||
* \par | ||||
* Cosine Table is generated from following loop | ||||
* <pre>for(i = 0; i < 360; i++) | ||||
* { | ||||
* cosTable[i]= cos((i-180) * PI/180.0); | ||||
* } </pre> | ||||
*/ | ||||
static const float32_t cosTable[360] = { | ||||
-0.999847695156391270f, -0.999390827019095760f, -0.998629534754573830f, | ||||
-0.997564050259824200f, -0.996194698091745550f, -0.994521895368273290f, | ||||
-0.992546151641321980f, -0.990268068741570250f, | ||||
-0.987688340595137660f, -0.984807753012208020f, -0.981627183447663980f, | ||||
-0.978147600733805690f, -0.974370064785235250f, -0.970295726275996470f, | ||||
-0.965925826289068200f, -0.961261695938318670f, | ||||
-0.956304755963035440f, -0.951056516295153530f, -0.945518575599316740f, | ||||
-0.939692620785908320f, -0.933580426497201740f, -0.927183854566787310f, | ||||
-0.920504853452440150f, -0.913545457642600760f, | ||||
-0.906307787036649940f, -0.898794046299167040f, -0.891006524188367790f, | ||||
-0.882947592858926770f, -0.874619707139395740f, -0.866025403784438710f, | ||||
-0.857167300702112220f, -0.848048096156425960f, | ||||
-0.838670567945424160f, -0.829037572555041620f, -0.819152044288991580f, | ||||
-0.809016994374947340f, -0.798635510047292940f, -0.788010753606721900f, | ||||
-0.777145961456970680f, -0.766044443118977900f, | ||||
-0.754709580222772010f, -0.743144825477394130f, -0.731353701619170460f, | ||||
-0.719339800338651300f, -0.707106781186547460f, -0.694658370458997030f, | ||||
-0.681998360062498370f, -0.669130606358858240f, | ||||
-0.656059028990507500f, -0.642787609686539360f, -0.629320391049837280f, | ||||
-0.615661475325658290f, -0.601815023152048380f, -0.587785252292473030f, | ||||
-0.573576436351045830f, -0.559192903470746680f, | ||||
-0.544639035015027080f, -0.529919264233204790f, -0.515038074910054270f, | ||||
-0.499999999999999780f, -0.484809620246337000f, -0.469471562785890530f, | ||||
-0.453990499739546750f, -0.438371146789077510f, | ||||
-0.422618261740699330f, -0.406736643075800100f, -0.390731128489273600f, | ||||
-0.374606593415912070f, -0.358367949545300270f, -0.342020143325668710f, | ||||
-0.325568154457156420f, -0.309016994374947340f, | ||||
-0.292371704722736660f, -0.275637355816999050f, -0.258819045102520850f, | ||||
-0.241921895599667790f, -0.224951054343864810f, -0.207911690817759120f, | ||||
-0.190808995376544800f, -0.173648177666930300f, | ||||
-0.156434465040231040f, -0.139173100960065350f, -0.121869343405147370f, | ||||
-0.104528463267653330f, -0.087155742747658235f, -0.069756473744125330f, | ||||
-0.052335956242943620f, -0.034899496702500733f, | ||||
-0.017452406437283477f, 0.000000000000000061f, 0.017452406437283376f, | ||||
0.034899496702501080f, 0.052335956242943966f, 0.069756473744125455f, | ||||
0.087155742747658138f, 0.104528463267653460f, | ||||
0.121869343405147490f, 0.139173100960065690f, 0.156434465040230920f, | ||||
0.173648177666930410f, 0.190808995376544920f, 0.207911690817759450f, | ||||
0.224951054343864920f, 0.241921895599667900f, | ||||
0.258819045102520740f, 0.275637355816999160f, 0.292371704722736770f, | ||||
0.309016994374947450f, 0.325568154457156760f, 0.342020143325668820f, | ||||
0.358367949545300380f, 0.374606593415911960f, | ||||
0.390731128489273940f, 0.406736643075800210f, 0.422618261740699440f, | ||||
0.438371146789077460f, 0.453990499739546860f, 0.469471562785890860f, | ||||
0.484809620246337110f, 0.500000000000000110f, | ||||
0.515038074910054380f, 0.529919264233204900f, 0.544639035015027200f, | ||||
0.559192903470746790f, 0.573576436351046050f, 0.587785252292473140f, | ||||
0.601815023152048270f, 0.615661475325658290f, | ||||
0.629320391049837500f, 0.642787609686539360f, 0.656059028990507280f, | ||||
0.669130606358858240f, 0.681998360062498480f, 0.694658370458997370f, | ||||
0.707106781186547570f, 0.719339800338651190f, | ||||
0.731353701619170570f, 0.743144825477394240f, 0.754709580222772010f, | ||||
0.766044443118978010f, 0.777145961456970900f, 0.788010753606722010f, | ||||
0.798635510047292830f, 0.809016994374947450f, | ||||
0.819152044288991800f, 0.829037572555041620f, 0.838670567945424050f, | ||||
0.848048096156425960f, 0.857167300702112330f, 0.866025403784438710f, | ||||
0.874619707139395740f, 0.882947592858926990f, | ||||
0.891006524188367900f, 0.898794046299167040f, 0.906307787036649940f, | ||||
0.913545457642600870f, 0.920504853452440370f, 0.927183854566787420f, | ||||
0.933580426497201740f, 0.939692620785908430f, | ||||
0.945518575599316850f, 0.951056516295153530f, 0.956304755963035440f, | ||||
0.961261695938318890f, 0.965925826289068310f, 0.970295726275996470f, | ||||
0.974370064785235250f, 0.978147600733805690f, | ||||
0.981627183447663980f, 0.984807753012208020f, 0.987688340595137770f, | ||||
0.990268068741570360f, 0.992546151641321980f, 0.994521895368273290f, | ||||
0.996194698091745550f, 0.997564050259824200f, | ||||
0.998629534754573830f, 0.999390827019095760f, 0.999847695156391270f, | ||||
1.000000000000000000f, 0.999847695156391270f, 0.999390827019095760f, | ||||
0.998629534754573830f, 0.997564050259824200f, | ||||
0.996194698091745550f, 0.994521895368273290f, 0.992546151641321980f, | ||||
0.990268068741570360f, 0.987688340595137770f, 0.984807753012208020f, | ||||
0.981627183447663980f, 0.978147600733805690f, | ||||
0.974370064785235250f, 0.970295726275996470f, 0.965925826289068310f, | ||||
0.961261695938318890f, 0.956304755963035440f, 0.951056516295153530f, | ||||
0.945518575599316850f, 0.939692620785908430f, | ||||
0.933580426497201740f, 0.927183854566787420f, 0.920504853452440370f, | ||||
0.913545457642600870f, 0.906307787036649940f, 0.898794046299167040f, | ||||
0.891006524188367900f, 0.882947592858926990f, | ||||
0.874619707139395740f, 0.866025403784438710f, 0.857167300702112330f, | ||||
0.848048096156425960f, 0.838670567945424050f, 0.829037572555041620f, | ||||
0.819152044288991800f, 0.809016994374947450f, | ||||
0.798635510047292830f, 0.788010753606722010f, 0.777145961456970900f, | ||||
0.766044443118978010f, 0.754709580222772010f, 0.743144825477394240f, | ||||
0.731353701619170570f, 0.719339800338651190f, | ||||
0.707106781186547570f, 0.694658370458997370f, 0.681998360062498480f, | ||||
0.669130606358858240f, 0.656059028990507280f, 0.642787609686539360f, | ||||
0.629320391049837500f, 0.615661475325658290f, | ||||
0.601815023152048270f, 0.587785252292473140f, 0.573576436351046050f, | ||||
0.559192903470746790f, 0.544639035015027200f, 0.529919264233204900f, | ||||
0.515038074910054380f, 0.500000000000000110f, | ||||
0.484809620246337110f, 0.469471562785890860f, 0.453990499739546860f, | ||||
0.438371146789077460f, 0.422618261740699440f, 0.406736643075800210f, | ||||
0.390731128489273940f, 0.374606593415911960f, | ||||
0.358367949545300380f, 0.342020143325668820f, 0.325568154457156760f, | ||||
0.309016994374947450f, 0.292371704722736770f, 0.275637355816999160f, | ||||
0.258819045102520740f, 0.241921895599667900f, | ||||
0.224951054343864920f, 0.207911690817759450f, 0.190808995376544920f, | ||||
0.173648177666930410f, 0.156434465040230920f, 0.139173100960065690f, | ||||
0.121869343405147490f, 0.104528463267653460f, | ||||
0.087155742747658138f, 0.069756473744125455f, 0.052335956242943966f, | ||||
0.034899496702501080f, 0.017452406437283376f, 0.000000000000000061f, | ||||
-0.017452406437283477f, -0.034899496702500733f, | ||||
-0.052335956242943620f, -0.069756473744125330f, -0.087155742747658235f, | ||||
-0.104528463267653330f, -0.121869343405147370f, -0.139173100960065350f, | ||||
-0.156434465040231040f, -0.173648177666930300f, | ||||
-0.190808995376544800f, -0.207911690817759120f, -0.224951054343864810f, | ||||
-0.241921895599667790f, -0.258819045102520850f, -0.275637355816999050f, | ||||
-0.292371704722736660f, -0.309016994374947340f, | ||||
-0.325568154457156420f, -0.342020143325668710f, -0.358367949545300270f, | ||||
-0.374606593415912070f, -0.390731128489273600f, -0.406736643075800100f, | ||||
-0.422618261740699330f, -0.438371146789077510f, | ||||
-0.453990499739546750f, -0.469471562785890530f, -0.484809620246337000f, | ||||
-0.499999999999999780f, -0.515038074910054270f, -0.529919264233204790f, | ||||
-0.544639035015027080f, -0.559192903470746680f, | ||||
-0.573576436351045830f, -0.587785252292473030f, -0.601815023152048380f, | ||||
-0.615661475325658290f, -0.629320391049837280f, -0.642787609686539360f, | ||||
-0.656059028990507500f, -0.669130606358858240f, | ||||
-0.681998360062498370f, -0.694658370458997030f, -0.707106781186547460f, | ||||
-0.719339800338651300f, -0.731353701619170460f, -0.743144825477394130f, | ||||
-0.754709580222772010f, -0.766044443118977900f, | ||||
-0.777145961456970680f, -0.788010753606721900f, -0.798635510047292940f, | ||||
-0.809016994374947340f, -0.819152044288991580f, -0.829037572555041620f, | ||||
-0.838670567945424160f, -0.848048096156425960f, | ||||
-0.857167300702112220f, -0.866025403784438710f, -0.874619707139395740f, | ||||
-0.882947592858926770f, -0.891006524188367790f, -0.898794046299167040f, | ||||
-0.906307787036649940f, -0.913545457642600760f, | ||||
-0.920504853452440150f, -0.927183854566787310f, -0.933580426497201740f, | ||||
-0.939692620785908320f, -0.945518575599316740f, -0.951056516295153530f, | ||||
-0.956304755963035440f, -0.961261695938318670f, | ||||
-0.965925826289068200f, -0.970295726275996470f, -0.974370064785235250f, | ||||
-0.978147600733805690f, -0.981627183447663980f, -0.984807753012208020f, | ||||
-0.987688340595137660f, -0.990268068741570250f, | ||||
-0.992546151641321980f, -0.994521895368273290f, -0.996194698091745550f, | ||||
-0.997564050259824200f, -0.998629534754573830f, -0.999390827019095760f, | ||||
-0.999847695156391270f, -1.000000000000000000f | ||||
}; | ||||
/** | ||||
* \par | ||||
* Sine Table is generated from following loop | ||||
* <pre>for(i = 0; i < 360; i++) | ||||
* { | ||||
* sinTable[i]= sin((i-180) * PI/180.0); | ||||
* } </pre> | ||||
*/ | ||||
static const float32_t sinTable[360] = { | ||||
-0.017452406437283439f, -0.034899496702500699f, -0.052335956242943807f, | ||||
-0.069756473744125524f, -0.087155742747658638f, -0.104528463267653730f, | ||||
-0.121869343405147550f, -0.139173100960065740f, | ||||
-0.156434465040230980f, -0.173648177666930280f, -0.190808995376544970f, | ||||
-0.207911690817759310f, -0.224951054343864780f, -0.241921895599667730f, | ||||
-0.258819045102521020f, -0.275637355816999660f, | ||||
-0.292371704722737050f, -0.309016994374947510f, -0.325568154457156980f, | ||||
-0.342020143325668880f, -0.358367949545300210f, -0.374606593415912240f, | ||||
-0.390731128489274160f, -0.406736643075800430f, | ||||
-0.422618261740699500f, -0.438371146789077290f, -0.453990499739546860f, | ||||
-0.469471562785891080f, -0.484809620246337170f, -0.499999999999999940f, | ||||
-0.515038074910054380f, -0.529919264233204900f, | ||||
-0.544639035015026860f, -0.559192903470746900f, -0.573576436351046380f, | ||||
-0.587785252292473250f, -0.601815023152048160f, -0.615661475325658400f, | ||||
-0.629320391049837720f, -0.642787609686539470f, | ||||
-0.656059028990507280f, -0.669130606358858350f, -0.681998360062498590f, | ||||
-0.694658370458997140f, -0.707106781186547570f, -0.719339800338651410f, | ||||
-0.731353701619170570f, -0.743144825477394240f, | ||||
-0.754709580222771790f, -0.766044443118978010f, -0.777145961456971010f, | ||||
-0.788010753606722010f, -0.798635510047292720f, -0.809016994374947450f, | ||||
-0.819152044288992020f, -0.829037572555041740f, | ||||
-0.838670567945424050f, -0.848048096156426070f, -0.857167300702112330f, | ||||
-0.866025403784438710f, -0.874619707139395850f, -0.882947592858927100f, | ||||
-0.891006524188367900f, -0.898794046299166930f, | ||||
-0.906307787036650050f, -0.913545457642600980f, -0.920504853452440370f, | ||||
-0.927183854566787420f, -0.933580426497201740f, -0.939692620785908430f, | ||||
-0.945518575599316850f, -0.951056516295153640f, | ||||
-0.956304755963035550f, -0.961261695938318890f, -0.965925826289068310f, | ||||
-0.970295726275996470f, -0.974370064785235250f, -0.978147600733805690f, | ||||
-0.981627183447663980f, -0.984807753012208020f, | ||||
-0.987688340595137660f, -0.990268068741570360f, -0.992546151641322090f, | ||||
-0.994521895368273400f, -0.996194698091745550f, -0.997564050259824200f, | ||||
-0.998629534754573830f, -0.999390827019095760f, | ||||
-0.999847695156391270f, -1.000000000000000000f, -0.999847695156391270f, | ||||
-0.999390827019095760f, -0.998629534754573830f, -0.997564050259824200f, | ||||
-0.996194698091745550f, -0.994521895368273290f, | ||||
-0.992546151641321980f, -0.990268068741570250f, -0.987688340595137770f, | ||||
-0.984807753012208020f, -0.981627183447663980f, -0.978147600733805580f, | ||||
-0.974370064785235250f, -0.970295726275996470f, | ||||
-0.965925826289068310f, -0.961261695938318890f, -0.956304755963035440f, | ||||
-0.951056516295153530f, -0.945518575599316740f, -0.939692620785908320f, | ||||
-0.933580426497201740f, -0.927183854566787420f, | ||||
-0.920504853452440260f, -0.913545457642600870f, -0.906307787036649940f, | ||||
-0.898794046299167040f, -0.891006524188367790f, -0.882947592858926880f, | ||||
-0.874619707139395740f, -0.866025403784438600f, | ||||
-0.857167300702112220f, -0.848048096156426070f, -0.838670567945423940f, | ||||
-0.829037572555041740f, -0.819152044288991800f, -0.809016994374947450f, | ||||
-0.798635510047292830f, -0.788010753606722010f, | ||||
-0.777145961456970790f, -0.766044443118978010f, -0.754709580222772010f, | ||||
-0.743144825477394240f, -0.731353701619170460f, -0.719339800338651080f, | ||||
-0.707106781186547460f, -0.694658370458997250f, | ||||
-0.681998360062498480f, -0.669130606358858240f, -0.656059028990507160f, | ||||
-0.642787609686539250f, -0.629320391049837390f, -0.615661475325658180f, | ||||
-0.601815023152048270f, -0.587785252292473140f, | ||||
-0.573576436351046050f, -0.559192903470746900f, -0.544639035015027080f, | ||||
-0.529919264233204900f, -0.515038074910054160f, -0.499999999999999940f, | ||||
-0.484809620246337060f, -0.469471562785890810f, | ||||
-0.453990499739546750f, -0.438371146789077400f, -0.422618261740699440f, | ||||
-0.406736643075800150f, -0.390731128489273720f, -0.374606593415912010f, | ||||
-0.358367949545300270f, -0.342020143325668710f, | ||||
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-0.224951054343865000f, -0.207911690817759310f, | ||||
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-0.139173100960065440f, -0.121869343405147480f, -0.104528463267653460f, | ||||
-0.087155742747658166f, -0.069756473744125302f, | ||||
-0.052335956242943828f, -0.034899496702500969f, -0.017452406437283512f, | ||||
0.000000000000000000f, 0.017452406437283512f, 0.034899496702500969f, | ||||
0.052335956242943828f, 0.069756473744125302f, | ||||
0.087155742747658166f, 0.104528463267653460f, 0.121869343405147480f, | ||||
0.139173100960065440f, 0.156434465040230870f, 0.173648177666930330f, | ||||
0.190808995376544800f, 0.207911690817759310f, | ||||
0.224951054343865000f, 0.241921895599667730f, 0.258819045102520740f, | ||||
0.275637355816999160f, 0.292371704722736770f, 0.309016994374947400f, | ||||
0.325568154457156640f, 0.342020143325668710f, | ||||
0.358367949545300270f, 0.374606593415912010f, 0.390731128489273720f, | ||||
0.406736643075800150f, 0.422618261740699440f, 0.438371146789077400f, | ||||
0.453990499739546750f, 0.469471562785890810f, | ||||
0.484809620246337060f, 0.499999999999999940f, 0.515038074910054160f, | ||||
0.529919264233204900f, 0.544639035015027080f, 0.559192903470746900f, | ||||
0.573576436351046050f, 0.587785252292473140f, | ||||
0.601815023152048270f, 0.615661475325658180f, 0.629320391049837390f, | ||||
0.642787609686539250f, 0.656059028990507160f, 0.669130606358858240f, | ||||
0.681998360062498480f, 0.694658370458997250f, | ||||
0.707106781186547460f, 0.719339800338651080f, 0.731353701619170460f, | ||||
0.743144825477394240f, 0.754709580222772010f, 0.766044443118978010f, | ||||
0.777145961456970790f, 0.788010753606722010f, | ||||
0.798635510047292830f, 0.809016994374947450f, 0.819152044288991800f, | ||||
0.829037572555041740f, 0.838670567945423940f, 0.848048096156426070f, | ||||
0.857167300702112220f, 0.866025403784438600f, | ||||
0.874619707139395740f, 0.882947592858926880f, 0.891006524188367790f, | ||||
0.898794046299167040f, 0.906307787036649940f, 0.913545457642600870f, | ||||
0.920504853452440260f, 0.927183854566787420f, | ||||
0.933580426497201740f, 0.939692620785908320f, 0.945518575599316740f, | ||||
0.951056516295153530f, 0.956304755963035440f, 0.961261695938318890f, | ||||
0.965925826289068310f, 0.970295726275996470f, | ||||
0.974370064785235250f, 0.978147600733805580f, 0.981627183447663980f, | ||||
0.984807753012208020f, 0.987688340595137770f, 0.990268068741570250f, | ||||
0.992546151641321980f, 0.994521895368273290f, | ||||
0.996194698091745550f, 0.997564050259824200f, 0.998629534754573830f, | ||||
0.999390827019095760f, 0.999847695156391270f, 1.000000000000000000f, | ||||
0.999847695156391270f, 0.999390827019095760f, | ||||
0.998629534754573830f, 0.997564050259824200f, 0.996194698091745550f, | ||||
0.994521895368273400f, 0.992546151641322090f, 0.990268068741570360f, | ||||
0.987688340595137660f, 0.984807753012208020f, | ||||
0.981627183447663980f, 0.978147600733805690f, 0.974370064785235250f, | ||||
0.970295726275996470f, 0.965925826289068310f, 0.961261695938318890f, | ||||
0.956304755963035550f, 0.951056516295153640f, | ||||
0.945518575599316850f, 0.939692620785908430f, 0.933580426497201740f, | ||||
0.927183854566787420f, 0.920504853452440370f, 0.913545457642600980f, | ||||
0.906307787036650050f, 0.898794046299166930f, | ||||
0.891006524188367900f, 0.882947592858927100f, 0.874619707139395850f, | ||||
0.866025403784438710f, 0.857167300702112330f, 0.848048096156426070f, | ||||
0.838670567945424050f, 0.829037572555041740f, | ||||
0.819152044288992020f, 0.809016994374947450f, 0.798635510047292720f, | ||||
0.788010753606722010f, 0.777145961456971010f, 0.766044443118978010f, | ||||
0.754709580222771790f, 0.743144825477394240f, | ||||
0.731353701619170570f, 0.719339800338651410f, 0.707106781186547570f, | ||||
0.694658370458997140f, 0.681998360062498590f, 0.669130606358858350f, | ||||
0.656059028990507280f, 0.642787609686539470f, | ||||
0.629320391049837720f, 0.615661475325658400f, 0.601815023152048160f, | ||||
0.587785252292473250f, 0.573576436351046380f, 0.559192903470746900f, | ||||
0.544639035015026860f, 0.529919264233204900f, | ||||
0.515038074910054380f, 0.499999999999999940f, 0.484809620246337170f, | ||||
0.469471562785891080f, 0.453990499739546860f, 0.438371146789077290f, | ||||
0.422618261740699500f, 0.406736643075800430f, | ||||
0.390731128489274160f, 0.374606593415912240f, 0.358367949545300210f, | ||||
0.342020143325668880f, 0.325568154457156980f, 0.309016994374947510f, | ||||
0.292371704722737050f, 0.275637355816999660f, | ||||
0.258819045102521020f, 0.241921895599667730f, 0.224951054343864780f, | ||||
0.207911690817759310f, 0.190808995376544970f, 0.173648177666930280f, | ||||
0.156434465040230980f, 0.139173100960065740f, | ||||
0.121869343405147550f, 0.104528463267653730f, 0.087155742747658638f, | ||||
0.069756473744125524f, 0.052335956242943807f, 0.034899496702500699f, | ||||
0.017452406437283439f, 0.000000000000000122f | ||||
}; | ||||
/** | ||||
* @brief Floating-point sin_cos function. | ||||
* @param[in] theta input value in degrees | ||||
* @param[out] *pSinVal points to the processed sine output. | ||||
* @param[out] *pCosVal points to the processed cos output. | ||||
* @return none. | ||||
*/ | ||||
void arm_sin_cos_f32( | ||||
float32_t theta, | ||||
float32_t * pSinVal, | ||||
float32_t * pCosVal) | ||||
{ | ||||
uint32_t i; /* Index for reading nearwst output values */ | ||||
float32_t x1 = -179.0f; /* Initial input value */ | ||||
float32_t y0, y1; /* nearest output values */ | ||||
float32_t fract; /* fractional part of input */ | ||||
/* Calculation of fractional part */ | ||||
if(theta > 0.0f) | ||||
{ | ||||
fract = theta - (float32_t) ((int32_t) theta); | ||||
} | ||||
else | ||||
{ | ||||
fract = (theta - (float32_t) ((int32_t) theta)) + 1.0f; | ||||
} | ||||
/* index calculation for reading nearest output values */ | ||||
i = (uint32_t) (theta - x1); | ||||
/* reading nearest sine output values */ | ||||
y0 = sinTable[i]; | ||||
y1 = sinTable[i + 1u]; | ||||
/* Calculation of sine value */ | ||||
*pSinVal = y0 + (fract * (y1 - y0)); | ||||
/* reading nearest cosine output values */ | ||||
y0 = cosTable[i]; | ||||
y1 = cosTable[i + 1u]; | ||||
/* Calculation of cosine value */ | ||||
*pCosVal = y0 + (fract * (y1 - y0)); | ||||
} | ||||
/** | ||||
* @} end of SinCos group | ||||
*/ | ||||