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49 <div class="headertitle">
50 <h1>arm_sin_cos_f32.c</h1> </div>
52 <div class="contents">
53 <a href="arm__sin__cos__f32_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* ---------------------------------------------------------------------- </span>
54 <a name="l00002"></a>00002 <span class="comment">* Copyright (C) 2010 ARM Limited. All rights reserved. </span>
55 <a name="l00003"></a>00003 <span class="comment">* </span>
56 <a name="l00004"></a>00004 <span class="comment">* $Date: 15. July 2011 </span>
57 <a name="l00005"></a>00005 <span class="comment">* $Revision: V1.0.10 </span>
58 <a name="l00006"></a>00006 <span class="comment">* </span>
59 <a name="l00007"></a>00007 <span class="comment">* Project: CMSIS DSP Library </span>
60 <a name="l00008"></a>00008 <span class="comment">* Title: arm_sin_cos_f32.c </span>
61 <a name="l00009"></a>00009 <span class="comment">* </span>
62 <a name="l00010"></a>00010 <span class="comment">* Description: Sine and Cosine calculation for floating-point values. </span>
63 <a name="l00011"></a>00011 <span class="comment">* </span>
64 <a name="l00012"></a>00012 <span class="comment">* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0</span>
65 <a name="l00013"></a>00013 <span class="comment">* </span>
66 <a name="l00014"></a>00014 <span class="comment">* Version 1.0.10 2011/7/15 </span>
67 <a name="l00015"></a>00015 <span class="comment">* Big Endian support added and Merged M0 and M3/M4 Source code. </span>
68 <a name="l00016"></a>00016 <span class="comment">* </span>
69 <a name="l00017"></a>00017 <span class="comment">* Version 1.0.3 2010/11/29 </span>
70 <a name="l00018"></a>00018 <span class="comment">* Re-organized the CMSIS folders and updated documentation. </span>
71 <a name="l00019"></a>00019 <span class="comment">* </span>
72 <a name="l00020"></a>00020 <span class="comment">* Version 1.0.2 2010/11/11 </span>
73 <a name="l00021"></a>00021 <span class="comment">* Documentation updated. </span>
74 <a name="l00022"></a>00022 <span class="comment">* </span>
75 <a name="l00023"></a>00023 <span class="comment">* Version 1.0.1 2010/10/05 </span>
76 <a name="l00024"></a>00024 <span class="comment">* Production release and review comments incorporated. </span>
77 <a name="l00025"></a>00025 <span class="comment">* </span>
78 <a name="l00026"></a>00026 <span class="comment">* Version 1.0.0 2010/09/20 </span>
79 <a name="l00027"></a>00027 <span class="comment">* Production release and review comments incorporated. </span>
80 <a name="l00028"></a>00028 <span class="comment">* -------------------------------------------------------------------- */</span>
81 <a name="l00029"></a>00029
82 <a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="arm__math_8h.html">arm_math.h</a>"</span>
83 <a name="l00031"></a>00031
84 <a name="l00071"></a><a class="code" href="group___sin_cos.html#ga73d46b72b2e2e5c3301adb7a8a7cab5e">00071</a> <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="group___sin_cos.html#ga73d46b72b2e2e5c3301adb7a8a7cab5e">cosTable</a>[360] = {
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217 <a name="l00204"></a>00204 -0.992546151641321980f, -0.994521895368273290f, -0.996194698091745550f,
218 <a name="l00205"></a>00205 -0.997564050259824200f, -0.998629534754573830f, -0.999390827019095760f,
219 <a name="l00206"></a>00206 -0.999847695156391270f, -1.000000000000000000f
220 <a name="l00207"></a>00207 };
221 <a name="l00208"></a>00208
222 <a name="l00219"></a><a class="code" href="group___sin_cos.html#ga2e70480fd73eae93d51a6e881bb1f2e4">00219</a> <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="group___sin_cos.html#ga2e70480fd73eae93d51a6e881bb1f2e4">sinTable</a>[360] = {
223 <a name="l00220"></a>00220 -0.017452406437283439f, -0.034899496702500699f, -0.052335956242943807f,
224 <a name="l00221"></a>00221 -0.069756473744125524f, -0.087155742747658638f, -0.104528463267653730f,
225 <a name="l00222"></a>00222 -0.121869343405147550f, -0.139173100960065740f,
226 <a name="l00223"></a>00223 -0.156434465040230980f, -0.173648177666930280f, -0.190808995376544970f,
227 <a name="l00224"></a>00224 -0.207911690817759310f, -0.224951054343864780f, -0.241921895599667730f,
228 <a name="l00225"></a>00225 -0.258819045102521020f, -0.275637355816999660f,
229 <a name="l00226"></a>00226 -0.292371704722737050f, -0.309016994374947510f, -0.325568154457156980f,
230 <a name="l00227"></a>00227 -0.342020143325668880f, -0.358367949545300210f, -0.374606593415912240f,
231 <a name="l00228"></a>00228 -0.390731128489274160f, -0.406736643075800430f,
232 <a name="l00229"></a>00229 -0.422618261740699500f, -0.438371146789077290f, -0.453990499739546860f,
233 <a name="l00230"></a>00230 -0.469471562785891080f, -0.484809620246337170f, -0.499999999999999940f,
234 <a name="l00231"></a>00231 -0.515038074910054380f, -0.529919264233204900f,
235 <a name="l00232"></a>00232 -0.544639035015026860f, -0.559192903470746900f, -0.573576436351046380f,
236 <a name="l00233"></a>00233 -0.587785252292473250f, -0.601815023152048160f, -0.615661475325658400f,
237 <a name="l00234"></a>00234 -0.629320391049837720f, -0.642787609686539470f,
238 <a name="l00235"></a>00235 -0.656059028990507280f, -0.669130606358858350f, -0.681998360062498590f,
239 <a name="l00236"></a>00236 -0.694658370458997140f, -0.707106781186547570f, -0.719339800338651410f,
240 <a name="l00237"></a>00237 -0.731353701619170570f, -0.743144825477394240f,
241 <a name="l00238"></a>00238 -0.754709580222771790f, -0.766044443118978010f, -0.777145961456971010f,
242 <a name="l00239"></a>00239 -0.788010753606722010f, -0.798635510047292720f, -0.809016994374947450f,
243 <a name="l00240"></a>00240 -0.819152044288992020f, -0.829037572555041740f,
244 <a name="l00241"></a>00241 -0.838670567945424050f, -0.848048096156426070f, -0.857167300702112330f,
245 <a name="l00242"></a>00242 -0.866025403784438710f, -0.874619707139395850f, -0.882947592858927100f,
246 <a name="l00243"></a>00243 -0.891006524188367900f, -0.898794046299166930f,
247 <a name="l00244"></a>00244 -0.906307787036650050f, -0.913545457642600980f, -0.920504853452440370f,
248 <a name="l00245"></a>00245 -0.927183854566787420f, -0.933580426497201740f, -0.939692620785908430f,
249 <a name="l00246"></a>00246 -0.945518575599316850f, -0.951056516295153640f,
250 <a name="l00247"></a>00247 -0.956304755963035550f, -0.961261695938318890f, -0.965925826289068310f,
251 <a name="l00248"></a>00248 -0.970295726275996470f, -0.974370064785235250f, -0.978147600733805690f,
252 <a name="l00249"></a>00249 -0.981627183447663980f, -0.984807753012208020f,
253 <a name="l00250"></a>00250 -0.987688340595137660f, -0.990268068741570360f, -0.992546151641322090f,
254 <a name="l00251"></a>00251 -0.994521895368273400f, -0.996194698091745550f, -0.997564050259824200f,
255 <a name="l00252"></a>00252 -0.998629534754573830f, -0.999390827019095760f,
256 <a name="l00253"></a>00253 -0.999847695156391270f, -1.000000000000000000f, -0.999847695156391270f,
257 <a name="l00254"></a>00254 -0.999390827019095760f, -0.998629534754573830f, -0.997564050259824200f,
258 <a name="l00255"></a>00255 -0.996194698091745550f, -0.994521895368273290f,
259 <a name="l00256"></a>00256 -0.992546151641321980f, -0.990268068741570250f, -0.987688340595137770f,
260 <a name="l00257"></a>00257 -0.984807753012208020f, -0.981627183447663980f, -0.978147600733805580f,
261 <a name="l00258"></a>00258 -0.974370064785235250f, -0.970295726275996470f,
262 <a name="l00259"></a>00259 -0.965925826289068310f, -0.961261695938318890f, -0.956304755963035440f,
263 <a name="l00260"></a>00260 -0.951056516295153530f, -0.945518575599316740f, -0.939692620785908320f,
264 <a name="l00261"></a>00261 -0.933580426497201740f, -0.927183854566787420f,
265 <a name="l00262"></a>00262 -0.920504853452440260f, -0.913545457642600870f, -0.906307787036649940f,
266 <a name="l00263"></a>00263 -0.898794046299167040f, -0.891006524188367790f, -0.882947592858926880f,
267 <a name="l00264"></a>00264 -0.874619707139395740f, -0.866025403784438600f,
268 <a name="l00265"></a>00265 -0.857167300702112220f, -0.848048096156426070f, -0.838670567945423940f,
269 <a name="l00266"></a>00266 -0.829037572555041740f, -0.819152044288991800f, -0.809016994374947450f,
270 <a name="l00267"></a>00267 -0.798635510047292830f, -0.788010753606722010f,
271 <a name="l00268"></a>00268 -0.777145961456970790f, -0.766044443118978010f, -0.754709580222772010f,
272 <a name="l00269"></a>00269 -0.743144825477394240f, -0.731353701619170460f, -0.719339800338651080f,
273 <a name="l00270"></a>00270 -0.707106781186547460f, -0.694658370458997250f,
274 <a name="l00271"></a>00271 -0.681998360062498480f, -0.669130606358858240f, -0.656059028990507160f,
275 <a name="l00272"></a>00272 -0.642787609686539250f, -0.629320391049837390f, -0.615661475325658180f,
276 <a name="l00273"></a>00273 -0.601815023152048270f, -0.587785252292473140f,
277 <a name="l00274"></a>00274 -0.573576436351046050f, -0.559192903470746900f, -0.544639035015027080f,
278 <a name="l00275"></a>00275 -0.529919264233204900f, -0.515038074910054160f, -0.499999999999999940f,
279 <a name="l00276"></a>00276 -0.484809620246337060f, -0.469471562785890810f,
280 <a name="l00277"></a>00277 -0.453990499739546750f, -0.438371146789077400f, -0.422618261740699440f,
281 <a name="l00278"></a>00278 -0.406736643075800150f, -0.390731128489273720f, -0.374606593415912010f,
282 <a name="l00279"></a>00279 -0.358367949545300270f, -0.342020143325668710f,
283 <a name="l00280"></a>00280 -0.325568154457156640f, -0.309016994374947400f, -0.292371704722736770f,
284 <a name="l00281"></a>00281 -0.275637355816999160f, -0.258819045102520740f, -0.241921895599667730f,
285 <a name="l00282"></a>00282 -0.224951054343865000f, -0.207911690817759310f,
286 <a name="l00283"></a>00283 -0.190808995376544800f, -0.173648177666930330f, -0.156434465040230870f,
287 <a name="l00284"></a>00284 -0.139173100960065440f, -0.121869343405147480f, -0.104528463267653460f,
288 <a name="l00285"></a>00285 -0.087155742747658166f, -0.069756473744125302f,
289 <a name="l00286"></a>00286 -0.052335956242943828f, -0.034899496702500969f, -0.017452406437283512f,
290 <a name="l00287"></a>00287 0.000000000000000000f, 0.017452406437283512f, 0.034899496702500969f,
291 <a name="l00288"></a>00288 0.052335956242943828f, 0.069756473744125302f,
292 <a name="l00289"></a>00289 0.087155742747658166f, 0.104528463267653460f, 0.121869343405147480f,
293 <a name="l00290"></a>00290 0.139173100960065440f, 0.156434465040230870f, 0.173648177666930330f,
294 <a name="l00291"></a>00291 0.190808995376544800f, 0.207911690817759310f,
295 <a name="l00292"></a>00292 0.224951054343865000f, 0.241921895599667730f, 0.258819045102520740f,
296 <a name="l00293"></a>00293 0.275637355816999160f, 0.292371704722736770f, 0.309016994374947400f,
297 <a name="l00294"></a>00294 0.325568154457156640f, 0.342020143325668710f,
298 <a name="l00295"></a>00295 0.358367949545300270f, 0.374606593415912010f, 0.390731128489273720f,
299 <a name="l00296"></a>00296 0.406736643075800150f, 0.422618261740699440f, 0.438371146789077400f,
300 <a name="l00297"></a>00297 0.453990499739546750f, 0.469471562785890810f,
301 <a name="l00298"></a>00298 0.484809620246337060f, 0.499999999999999940f, 0.515038074910054160f,
302 <a name="l00299"></a>00299 0.529919264233204900f, 0.544639035015027080f, 0.559192903470746900f,
303 <a name="l00300"></a>00300 0.573576436351046050f, 0.587785252292473140f,
304 <a name="l00301"></a>00301 0.601815023152048270f, 0.615661475325658180f, 0.629320391049837390f,
305 <a name="l00302"></a>00302 0.642787609686539250f, 0.656059028990507160f, 0.669130606358858240f,
306 <a name="l00303"></a>00303 0.681998360062498480f, 0.694658370458997250f,
307 <a name="l00304"></a>00304 0.707106781186547460f, 0.719339800338651080f, 0.731353701619170460f,
308 <a name="l00305"></a>00305 0.743144825477394240f, 0.754709580222772010f, 0.766044443118978010f,
309 <a name="l00306"></a>00306 0.777145961456970790f, 0.788010753606722010f,
310 <a name="l00307"></a>00307 0.798635510047292830f, 0.809016994374947450f, 0.819152044288991800f,
311 <a name="l00308"></a>00308 0.829037572555041740f, 0.838670567945423940f, 0.848048096156426070f,
312 <a name="l00309"></a>00309 0.857167300702112220f, 0.866025403784438600f,
313 <a name="l00310"></a>00310 0.874619707139395740f, 0.882947592858926880f, 0.891006524188367790f,
314 <a name="l00311"></a>00311 0.898794046299167040f, 0.906307787036649940f, 0.913545457642600870f,
315 <a name="l00312"></a>00312 0.920504853452440260f, 0.927183854566787420f,
316 <a name="l00313"></a>00313 0.933580426497201740f, 0.939692620785908320f, 0.945518575599316740f,
317 <a name="l00314"></a>00314 0.951056516295153530f, 0.956304755963035440f, 0.961261695938318890f,
318 <a name="l00315"></a>00315 0.965925826289068310f, 0.970295726275996470f,
319 <a name="l00316"></a>00316 0.974370064785235250f, 0.978147600733805580f, 0.981627183447663980f,
320 <a name="l00317"></a>00317 0.984807753012208020f, 0.987688340595137770f, 0.990268068741570250f,
321 <a name="l00318"></a>00318 0.992546151641321980f, 0.994521895368273290f,
322 <a name="l00319"></a>00319 0.996194698091745550f, 0.997564050259824200f, 0.998629534754573830f,
323 <a name="l00320"></a>00320 0.999390827019095760f, 0.999847695156391270f, 1.000000000000000000f,
324 <a name="l00321"></a>00321 0.999847695156391270f, 0.999390827019095760f,
325 <a name="l00322"></a>00322 0.998629534754573830f, 0.997564050259824200f, 0.996194698091745550f,
326 <a name="l00323"></a>00323 0.994521895368273400f, 0.992546151641322090f, 0.990268068741570360f,
327 <a name="l00324"></a>00324 0.987688340595137660f, 0.984807753012208020f,
328 <a name="l00325"></a>00325 0.981627183447663980f, 0.978147600733805690f, 0.974370064785235250f,
329 <a name="l00326"></a>00326 0.970295726275996470f, 0.965925826289068310f, 0.961261695938318890f,
330 <a name="l00327"></a>00327 0.956304755963035550f, 0.951056516295153640f,
331 <a name="l00328"></a>00328 0.945518575599316850f, 0.939692620785908430f, 0.933580426497201740f,
332 <a name="l00329"></a>00329 0.927183854566787420f, 0.920504853452440370f, 0.913545457642600980f,
333 <a name="l00330"></a>00330 0.906307787036650050f, 0.898794046299166930f,
334 <a name="l00331"></a>00331 0.891006524188367900f, 0.882947592858927100f, 0.874619707139395850f,
335 <a name="l00332"></a>00332 0.866025403784438710f, 0.857167300702112330f, 0.848048096156426070f,
336 <a name="l00333"></a>00333 0.838670567945424050f, 0.829037572555041740f,
337 <a name="l00334"></a>00334 0.819152044288992020f, 0.809016994374947450f, 0.798635510047292720f,
338 <a name="l00335"></a>00335 0.788010753606722010f, 0.777145961456971010f, 0.766044443118978010f,
339 <a name="l00336"></a>00336 0.754709580222771790f, 0.743144825477394240f,
340 <a name="l00337"></a>00337 0.731353701619170570f, 0.719339800338651410f, 0.707106781186547570f,
341 <a name="l00338"></a>00338 0.694658370458997140f, 0.681998360062498590f, 0.669130606358858350f,
342 <a name="l00339"></a>00339 0.656059028990507280f, 0.642787609686539470f,
343 <a name="l00340"></a>00340 0.629320391049837720f, 0.615661475325658400f, 0.601815023152048160f,
344 <a name="l00341"></a>00341 0.587785252292473250f, 0.573576436351046380f, 0.559192903470746900f,
345 <a name="l00342"></a>00342 0.544639035015026860f, 0.529919264233204900f,
346 <a name="l00343"></a>00343 0.515038074910054380f, 0.499999999999999940f, 0.484809620246337170f,
347 <a name="l00344"></a>00344 0.469471562785891080f, 0.453990499739546860f, 0.438371146789077290f,
348 <a name="l00345"></a>00345 0.422618261740699500f, 0.406736643075800430f,
349 <a name="l00346"></a>00346 0.390731128489274160f, 0.374606593415912240f, 0.358367949545300210f,
350 <a name="l00347"></a>00347 0.342020143325668880f, 0.325568154457156980f, 0.309016994374947510f,
351 <a name="l00348"></a>00348 0.292371704722737050f, 0.275637355816999660f,
352 <a name="l00349"></a>00349 0.258819045102521020f, 0.241921895599667730f, 0.224951054343864780f,
353 <a name="l00350"></a>00350 0.207911690817759310f, 0.190808995376544970f, 0.173648177666930280f,
354 <a name="l00351"></a>00351 0.156434465040230980f, 0.139173100960065740f,
355 <a name="l00352"></a>00352 0.121869343405147550f, 0.104528463267653730f, 0.087155742747658638f,
356 <a name="l00353"></a>00353 0.069756473744125524f, 0.052335956242943807f, 0.034899496702500699f,
357 <a name="l00354"></a>00354 0.017452406437283439f, 0.000000000000000122f
358 <a name="l00355"></a>00355 };
359 <a name="l00356"></a>00356
360 <a name="l00357"></a>00357
361 <a name="l00367"></a><a class="code" href="group___sin_cos.html#ga4420d45c37d58c310ef9ae1b5fe58020">00367</a> <span class="keywordtype">void</span> <a class="code" href="group___sin_cos.html#ga4420d45c37d58c310ef9ae1b5fe58020" title="Floating-point sin_cos function.">arm_sin_cos_f32</a>(
362 <a name="l00368"></a>00368 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> theta,
363 <a name="l00369"></a>00369 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> * pSinVal,
364 <a name="l00370"></a>00370 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> * pCosVal)
365 <a name="l00371"></a>00371 {
366 <a name="l00372"></a>00372 uint32_t i; <span class="comment">/* Index for reading nearwst output values */</span>
367 <a name="l00373"></a>00373 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> x1 = -179.0f; <span class="comment">/* Initial input value */</span>
368 <a name="l00374"></a>00374 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> y0, y1; <span class="comment">/* nearest output values */</span>
369 <a name="l00375"></a>00375 <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> fract; <span class="comment">/* fractional part of input */</span>
370 <a name="l00376"></a>00376
371 <a name="l00377"></a>00377 <span class="comment">/* Calculation of fractional part */</span>
372 <a name="l00378"></a>00378 <span class="keywordflow">if</span>(theta > 0.0f)
373 <a name="l00379"></a>00379 {
374 <a name="l00380"></a>00380 fract = theta - (<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a>) ((int32_t) theta);
375 <a name="l00381"></a>00381 }
376 <a name="l00382"></a>00382 <span class="keywordflow">else</span>
377 <a name="l00383"></a>00383 {
378 <a name="l00384"></a>00384 fract = (theta - (<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a>) ((int32_t) theta)) + 1.0f;
379 <a name="l00385"></a>00385 }
380 <a name="l00386"></a>00386
381 <a name="l00387"></a>00387 <span class="comment">/* index calculation for reading nearest output values */</span>
382 <a name="l00388"></a>00388 i = (uint32_t) (theta - x1);
383 <a name="l00389"></a>00389
384 <a name="l00390"></a>00390 <span class="comment">/* reading nearest sine output values */</span>
385 <a name="l00391"></a>00391 y0 = <a class="code" href="group___sin_cos.html#ga2e70480fd73eae93d51a6e881bb1f2e4">sinTable</a>[i];
386 <a name="l00392"></a>00392 y1 = <a class="code" href="group___sin_cos.html#ga2e70480fd73eae93d51a6e881bb1f2e4">sinTable</a>[i + 1u];
387 <a name="l00393"></a>00393
388 <a name="l00394"></a>00394 <span class="comment">/* Calculation of sine value */</span>
389 <a name="l00395"></a>00395 *pSinVal = y0 + (fract * (y1 - y0));
390 <a name="l00396"></a>00396
391 <a name="l00397"></a>00397 <span class="comment">/* reading nearest cosine output values */</span>
392 <a name="l00398"></a>00398 y0 = <a class="code" href="group___sin_cos.html#ga73d46b72b2e2e5c3301adb7a8a7cab5e">cosTable</a>[i];
393 <a name="l00399"></a>00399 y1 = <a class="code" href="group___sin_cos.html#ga73d46b72b2e2e5c3301adb7a8a7cab5e">cosTable</a>[i + 1u];
394 <a name="l00400"></a>00400
395 <a name="l00401"></a>00401 <span class="comment">/* Calculation of cosine value */</span>
396 <a name="l00402"></a>00402 *pCosVal = y0 + (fract * (y1 - y0));
397 <a name="l00403"></a>00403
398 <a name="l00404"></a>00404 }
399 <a name="l00405"></a>00405
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