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2 | pj | 1 | /* |
2 | * Copyright (c) 1997-1999 Massachusetts Institute of Technology |
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3 | * |
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4 | * This program is free software; you can redistribute it and/or modify |
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5 | * it under the terms of the GNU General Public License as published by |
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6 | * the Free Software Foundation; either version 2 of the License, or |
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7 | * (at your option) any later version. |
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8 | * |
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9 | * This program is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | * GNU General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU General Public License |
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15 | * along with this program; if not, write to the Free Software |
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16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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17 | * |
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18 | */ |
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19 | |||
20 | /* This file was automatically generated --- DO NOT EDIT */ |
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21 | /* Generated on Tue May 18 13:55:18 EDT 1999 */ |
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22 | |||
23 | #include <ports/fftw-int.h> |
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24 | #include <ports/fftw.h> |
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25 | |||
26 | /* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddle 3 */ |
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27 | |||
28 | /* |
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29 | * This function contains 16 FP additions, 12 FP multiplications, |
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30 | * (or, 10 additions, 6 multiplications, 6 fused multiply/add), |
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31 | * 14 stack variables, and 12 memory accesses |
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32 | */ |
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33 | static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627); |
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34 | static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000); |
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35 | |||
36 | /* |
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37 | * Generator Id's : |
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38 | * $Id: ftw_3.c,v 1.1.1.1 2002-03-29 14:12:56 pj Exp $ |
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39 | * $Id: ftw_3.c,v 1.1.1.1 2002-03-29 14:12:56 pj Exp $ |
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40 | * $Id: ftw_3.c,v 1.1.1.1 2002-03-29 14:12:56 pj Exp $ |
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41 | */ |
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42 | |||
43 | void fftw_twiddle_3(fftw_complex *A, const fftw_complex *W, int iostride, int m, int dist) |
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44 | { |
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45 | int i; |
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46 | fftw_complex *inout; |
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47 | inout = A; |
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48 | for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 2) { |
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49 | fftw_real tmp1; |
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50 | fftw_real tmp18; |
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51 | fftw_real tmp6; |
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52 | fftw_real tmp14; |
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53 | fftw_real tmp11; |
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54 | fftw_real tmp15; |
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55 | fftw_real tmp12; |
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56 | fftw_real tmp17; |
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57 | ASSERT_ALIGNED_DOUBLE(); |
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58 | tmp1 = c_re(inout[0]); |
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59 | tmp18 = c_im(inout[0]); |
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60 | { |
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61 | fftw_real tmp3; |
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62 | fftw_real tmp5; |
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63 | fftw_real tmp2; |
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64 | fftw_real tmp4; |
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65 | ASSERT_ALIGNED_DOUBLE(); |
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66 | tmp3 = c_re(inout[iostride]); |
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67 | tmp5 = c_im(inout[iostride]); |
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68 | tmp2 = c_re(W[0]); |
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69 | tmp4 = c_im(W[0]); |
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70 | tmp6 = (tmp2 * tmp3) - (tmp4 * tmp5); |
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71 | tmp14 = (tmp4 * tmp3) + (tmp2 * tmp5); |
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72 | } |
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73 | { |
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74 | fftw_real tmp8; |
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75 | fftw_real tmp10; |
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76 | fftw_real tmp7; |
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77 | fftw_real tmp9; |
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78 | ASSERT_ALIGNED_DOUBLE(); |
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79 | tmp8 = c_re(inout[2 * iostride]); |
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80 | tmp10 = c_im(inout[2 * iostride]); |
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81 | tmp7 = c_re(W[1]); |
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82 | tmp9 = c_im(W[1]); |
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83 | tmp11 = (tmp7 * tmp8) - (tmp9 * tmp10); |
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84 | tmp15 = (tmp9 * tmp8) + (tmp7 * tmp10); |
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85 | } |
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86 | tmp12 = tmp6 + tmp11; |
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87 | tmp17 = tmp14 + tmp15; |
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88 | { |
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89 | fftw_real tmp13; |
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90 | fftw_real tmp16; |
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91 | fftw_real tmp19; |
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92 | fftw_real tmp20; |
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93 | ASSERT_ALIGNED_DOUBLE(); |
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94 | c_re(inout[0]) = tmp1 + tmp12; |
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95 | tmp13 = tmp1 - (K500000000 * tmp12); |
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96 | tmp16 = K866025403 * (tmp14 - tmp15); |
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97 | c_re(inout[2 * iostride]) = tmp13 - tmp16; |
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98 | c_re(inout[iostride]) = tmp13 + tmp16; |
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99 | c_im(inout[0]) = tmp17 + tmp18; |
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100 | tmp19 = K866025403 * (tmp11 - tmp6); |
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101 | tmp20 = tmp18 - (K500000000 * tmp17); |
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102 | c_im(inout[iostride]) = tmp19 + tmp20; |
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103 | c_im(inout[2 * iostride]) = tmp20 - tmp19; |
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104 | } |
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105 | } |
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106 | } |
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107 | |||
108 | static const int twiddle_order[] = |
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109 | {1, 2}; |
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110 | fftw_codelet_desc fftw_twiddle_3_desc = |
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111 | { |
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112 | "fftw_twiddle_3", |
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113 | (void (*)()) fftw_twiddle_3, |
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114 | 3, |
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115 | FFTW_FORWARD, |
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116 | FFTW_TWIDDLE, |
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117 | 66, |
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118 | 2, |
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119 | twiddle_order, |
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120 | }; |