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| Rev | Author | Line No. | Line |
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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 13:55:29 EDT 1999 */ |
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| 22 | |||
| 107 | pj | 23 | #include <fftw-int.h> |
| 24 | #include <fftw.h> |
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| 2 | pj | 25 | |
| 26 | /* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-forward 3 */ |
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| 27 | |||
| 28 | /* |
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| 29 | * This function contains 25 FP additions, 16 FP multiplications, |
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| 30 | * (or, 17 additions, 8 multiplications, 8 fused multiply/add), |
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| 31 | * 15 stack variables, and 24 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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| 107 | pj | 38 | * $Id: fhf_3.c,v 1.2 2003-03-24 11:14:57 pj Exp $ |
| 39 | * $Id: fhf_3.c,v 1.2 2003-03-24 11:14:57 pj Exp $ |
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| 40 | * $Id: fhf_3.c,v 1.2 2003-03-24 11:14:57 pj Exp $ |
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| 2 | pj | 41 | */ |
| 42 | |||
| 43 | void fftw_hc2hc_forward_3(fftw_real *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_real *X; |
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| 47 | fftw_real *Y; |
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| 48 | X = A; |
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| 49 | Y = A + (3 * iostride); |
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| 50 | { |
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| 51 | fftw_real tmp24; |
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| 52 | fftw_real tmp25; |
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| 53 | fftw_real tmp26; |
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| 54 | fftw_real tmp27; |
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| 55 | ASSERT_ALIGNED_DOUBLE(); |
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| 56 | tmp24 = X[0]; |
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| 57 | tmp25 = X[iostride]; |
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| 58 | tmp26 = X[2 * iostride]; |
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| 59 | tmp27 = tmp25 + tmp26; |
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| 60 | X[iostride] = tmp24 - (K500000000 * tmp27); |
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| 61 | X[0] = tmp24 + tmp27; |
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| 62 | Y[-iostride] = K866025403 * (tmp26 - tmp25); |
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| 63 | } |
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| 64 | X = X + dist; |
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| 65 | Y = Y - dist; |
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| 66 | for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 2) { |
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| 67 | fftw_real tmp4; |
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| 68 | fftw_real tmp21; |
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| 69 | fftw_real tmp9; |
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| 70 | fftw_real tmp17; |
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| 71 | fftw_real tmp14; |
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| 72 | fftw_real tmp18; |
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| 73 | fftw_real tmp15; |
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| 74 | fftw_real tmp20; |
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| 75 | ASSERT_ALIGNED_DOUBLE(); |
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| 76 | tmp4 = X[0]; |
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| 77 | tmp21 = Y[-2 * iostride]; |
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| 78 | { |
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| 79 | fftw_real tmp6; |
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| 80 | fftw_real tmp8; |
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| 81 | fftw_real tmp5; |
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| 82 | fftw_real tmp7; |
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| 83 | ASSERT_ALIGNED_DOUBLE(); |
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| 84 | tmp6 = X[iostride]; |
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| 85 | tmp8 = Y[-iostride]; |
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| 86 | tmp5 = c_re(W[0]); |
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| 87 | tmp7 = c_im(W[0]); |
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| 88 | tmp9 = (tmp5 * tmp6) - (tmp7 * tmp8); |
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| 89 | tmp17 = (tmp7 * tmp6) + (tmp5 * tmp8); |
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| 90 | } |
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| 91 | { |
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| 92 | fftw_real tmp11; |
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| 93 | fftw_real tmp13; |
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| 94 | fftw_real tmp10; |
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| 95 | fftw_real tmp12; |
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| 96 | ASSERT_ALIGNED_DOUBLE(); |
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| 97 | tmp11 = X[2 * iostride]; |
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| 98 | tmp13 = Y[0]; |
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| 99 | tmp10 = c_re(W[1]); |
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| 100 | tmp12 = c_im(W[1]); |
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| 101 | tmp14 = (tmp10 * tmp11) - (tmp12 * tmp13); |
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| 102 | tmp18 = (tmp12 * tmp11) + (tmp10 * tmp13); |
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| 103 | } |
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| 104 | tmp15 = tmp9 + tmp14; |
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| 105 | tmp20 = tmp17 + tmp18; |
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| 106 | { |
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| 107 | fftw_real tmp16; |
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| 108 | fftw_real tmp19; |
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| 109 | fftw_real tmp22; |
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| 110 | fftw_real tmp23; |
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| 111 | ASSERT_ALIGNED_DOUBLE(); |
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| 112 | X[0] = tmp4 + tmp15; |
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| 113 | tmp16 = tmp4 - (K500000000 * tmp15); |
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| 114 | tmp19 = K866025403 * (tmp17 - tmp18); |
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| 115 | Y[-2 * iostride] = tmp16 - tmp19; |
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| 116 | X[iostride] = tmp16 + tmp19; |
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| 117 | Y[0] = tmp20 + tmp21; |
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| 118 | tmp22 = tmp21 - (K500000000 * tmp20); |
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| 119 | tmp23 = K866025403 * (tmp14 - tmp9); |
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| 120 | X[2 * iostride] = -(tmp22 - tmp23); |
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| 121 | Y[-iostride] = tmp23 + tmp22; |
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| 122 | } |
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| 123 | } |
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| 124 | if (i == m) { |
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| 125 | fftw_real tmp1; |
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| 126 | fftw_real tmp3; |
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| 127 | fftw_real tmp2; |
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| 128 | ASSERT_ALIGNED_DOUBLE(); |
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| 129 | tmp1 = X[iostride]; |
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| 130 | tmp3 = X[0]; |
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| 131 | tmp2 = X[2 * iostride]; |
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| 132 | Y[0] = -(K866025403 * (tmp1 + tmp2)); |
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| 133 | X[iostride] = tmp3 + tmp2 - tmp1; |
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| 134 | X[0] = tmp3 - (K500000000 * (tmp2 - tmp1)); |
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| 135 | } |
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| 136 | } |
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| 137 | |||
| 138 | static const int twiddle_order[] = |
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| 139 | {1, 2}; |
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| 140 | fftw_codelet_desc fftw_hc2hc_forward_3_desc = |
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| 141 | { |
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| 142 | "fftw_hc2hc_forward_3", |
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| 143 | (void (*)()) fftw_hc2hc_forward_3, |
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| 144 | 3, |
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| 145 | FFTW_FORWARD, |
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| 146 | FFTW_HC2HC, |
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| 147 | 69, |
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| 148 | 2, |
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| 149 | twiddle_order, |
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| 150 | }; |