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1 /* |
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2 * LIBOIL - Library of Optimized Inner Loops |
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3 * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org> |
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4 * All rights reserved. |
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5 * |
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6 * Redistribution and use in source and binary forms, with or without |
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7 * modification, are permitted provided that the following conditions |
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8 * are met: |
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9 * 1. Redistributions of source code must retain the above copyright |
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10 * notice, this list of conditions and the following disclaimer. |
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11 * 2. Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * |
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15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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25 * POSSIBILITY OF SUCH DAMAGE. |
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26 */ |
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27 //Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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28 |
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29 #ifdef HAVE_CONFIG_H |
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30 #include "config.h" |
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31 #endif |
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32 |
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33 #include <liboil/liboilfunction.h> |
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34 #include <liboil/liboilclasses.h> |
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35 #include <math.h> |
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36 |
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37 /* XXX This gets more inaccurate as N increases */ |
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38 static void |
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39 sincos_f64_i20_fast(double *dest_sin, double *dest_cos, int n, double *offset, |
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40 double *interval) |
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41 { |
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42 int i; |
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43 double c,s,dc,ds,temp_s,temp_c; |
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44 |
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45 dest_sin[0] = s = sin(*offset); |
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46 dest_cos[0] = c = cos(*offset); |
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47 ds = sin(*interval); |
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48 dc = cos(*interval); |
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49 for(i=1;i<n;i++){ |
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50 temp_s = s*dc + c*ds; |
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51 temp_c = c*dc - s*ds; |
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52 dest_sin[i] = s = temp_s; |
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53 dest_cos[i] = c = temp_c; |
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54 } |
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55 } |
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56 OIL_DEFINE_IMPL (sincos_f64_i20_fast, sincos_f64); |
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57 |
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58 #ifdef HAVE_SINCOS |
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59 static void |
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60 sincos_f64_sincos (double *dest_sin, double *dest_cos, int n, double *offset, |
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61 double *interval) |
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62 { |
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63 int i; |
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64 |
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65 for(i=0;i<n;i++){ |
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66 sincos (*offset + *interval * i, dest_sin + i, dest_cos + i); |
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67 } |
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68 } |
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69 OIL_DEFINE_IMPL (sincos_f64_sincos, sincos_f64); |
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70 #endif |
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71 |
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72 |
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73 |
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74 #ifdef __SYMBIAN32__ |
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75 |
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76 OilFunctionImpl* __oil_function_impl_sincos_f64_i20_fast() { |
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77 return &_oil_function_impl_sincos_f64_i20_fast; |
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78 } |
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79 #endif |
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80 #if 0 |
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81 #ifdef __SYMBIAN32__ |
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82 |
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83 OilFunctionImpl* __oil_function_impl_sincos_f64_sincos() { |
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84 return &_oil_function_impl_sincos_f64_sincos; |
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85 } |
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86 #endif |
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87 #endif |
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88 |