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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 13:55:57 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 -hc2hc-backward 2 */ |
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| 27 | |||
| 28 | /* |
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| 29 | * This function contains 8 FP additions, 6 FP multiplications, |
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| 30 | * (or, 6 additions, 4 multiplications, 2 fused multiply/add), |
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| 31 | * 11 stack variables, and 16 memory accesses |
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| 32 | */ |
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| 33 | static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000); |
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| 34 | |||
| 35 | /* |
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| 36 | * Generator Id's : |
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| 37 | * $Id: fhb_2.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $ |
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| 38 | * $Id: fhb_2.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $ |
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| 39 | * $Id: fhb_2.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $ |
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| 40 | */ |
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| 41 | |||
| 42 | void fftw_hc2hc_backward_2(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist) |
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| 43 | { |
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| 44 | int i; |
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| 45 | fftw_real *X; |
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| 46 | fftw_real *Y; |
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| 47 | X = A; |
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| 48 | Y = A + (2 * iostride); |
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| 49 | { |
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| 50 | fftw_real tmp11; |
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| 51 | fftw_real tmp12; |
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| 52 | ASSERT_ALIGNED_DOUBLE(); |
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| 53 | tmp11 = X[0]; |
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| 54 | tmp12 = X[iostride]; |
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| 55 | X[iostride] = tmp11 - tmp12; |
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| 56 | X[0] = tmp11 + tmp12; |
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| 57 | } |
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| 58 | X = X + dist; |
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| 59 | Y = Y - dist; |
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| 60 | for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 1) { |
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| 61 | fftw_real tmp3; |
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| 62 | fftw_real tmp4; |
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| 63 | fftw_real tmp8; |
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| 64 | fftw_real tmp5; |
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| 65 | fftw_real tmp6; |
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| 66 | fftw_real tmp10; |
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| 67 | fftw_real tmp7; |
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| 68 | fftw_real tmp9; |
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| 69 | ASSERT_ALIGNED_DOUBLE(); |
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| 70 | tmp3 = X[0]; |
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| 71 | tmp4 = Y[-iostride]; |
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| 72 | tmp8 = tmp3 - tmp4; |
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| 73 | tmp5 = Y[0]; |
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| 74 | tmp6 = X[iostride]; |
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| 75 | tmp10 = tmp5 + tmp6; |
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| 76 | X[0] = tmp3 + tmp4; |
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| 77 | Y[-iostride] = tmp5 - tmp6; |
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| 78 | tmp7 = c_re(W[0]); |
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| 79 | tmp9 = c_im(W[0]); |
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| 80 | X[iostride] = (tmp7 * tmp8) + (tmp9 * tmp10); |
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| 81 | Y[0] = (tmp7 * tmp10) - (tmp9 * tmp8); |
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| 82 | } |
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| 83 | if (i == m) { |
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| 84 | fftw_real tmp1; |
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| 85 | fftw_real tmp2; |
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| 86 | ASSERT_ALIGNED_DOUBLE(); |
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| 87 | tmp1 = X[0]; |
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| 88 | X[0] = K2_000000000 * tmp1; |
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| 89 | tmp2 = Y[0]; |
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| 90 | X[iostride] = -(K2_000000000 * tmp2); |
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| 91 | } |
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| 92 | } |
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| 93 | |||
| 94 | static const int twiddle_order[] = |
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| 95 | {1}; |
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| 96 | fftw_codelet_desc fftw_hc2hc_backward_2_desc = |
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| 97 | { |
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| 98 | "fftw_hc2hc_backward_2", |
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| 99 | (void (*)()) fftw_hc2hc_backward_2, |
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| 100 | 2, |
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| 101 | FFTW_BACKWARD, |
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| 102 | FFTW_HC2HC, |
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| 103 | 58, |
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| 104 | 1, |
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| 105 | twiddle_order, |
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| 106 | }; |