Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* |
| 2 | * Copyright (c) 1997-1999 Massachusetts Institute of Technology |
||
| 3 | * |
||
| 4 | * This program is free software; you can redistribute it and/or modify |
||
| 5 | * it under the terms of the GNU General Public License as published by |
||
| 6 | * the Free Software Foundation; either version 2 of the License, or |
||
| 7 | * (at your option) any later version. |
||
| 8 | * |
||
| 9 | * This program is distributed in the hope that it will be useful, |
||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 12 | * GNU General Public License for more details. |
||
| 13 | * |
||
| 14 | * You should have received a copy of the GNU General Public License |
||
| 15 | * along with this program; if not, write to the Free Software |
||
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 17 | * |
||
| 18 | */ |
||
| 19 | |||
| 20 | #include <ports/fftw.h> |
||
| 21 | #include <ports/f77_func.h> |
||
| 22 | |||
| 23 | #ifdef F77_FUNC_ /* only compile wrappers if fortran mangling is known */ |
||
| 24 | |||
| 25 | /* fftwf77.c: |
||
| 26 | |||
| 27 | FORTRAN-callable "wrappers" for some of the FFTW routines. To |
||
| 28 | make these routines callable from FORTRAN, three things had to |
||
| 29 | be done: |
||
| 30 | |||
| 31 | * The routine names have to be in the style that is expected by |
||
| 32 | the FORTRAN linker. This is accomplished with the F77_FUNC_ |
||
| 33 | macro. (See the file "f77_func.h".) |
||
| 34 | |||
| 35 | * All parameters must be passed by reference. |
||
| 36 | |||
| 37 | * Return values had to be converted into parameters (some |
||
| 38 | Fortran implementations seem to have trouble calling C functions |
||
| 39 | that return a value). |
||
| 40 | |||
| 41 | Note that the "fftw_plan" and "fftwnd_plan" types are pointers. |
||
| 42 | The calling FORTRAN code should use a type of the same size |
||
| 43 | (probably "integer"). |
||
| 44 | |||
| 45 | The wrapper routines have the same name as the wrapped routine, |
||
| 46 | except that "fftw" and "fftwnd" are replaced by "fftw_f77" and |
||
| 47 | "fftwnd_f77". |
||
| 48 | |||
| 49 | */ |
||
| 50 | |||
| 51 | #ifdef __cplusplus |
||
| 52 | extern "C" { |
||
| 53 | #endif /* __cplusplus */ |
||
| 54 | |||
| 55 | /************************************************************************/ |
||
| 56 | |||
| 57 | void F77_FUNC_(fftw_f77_create_plan,FFTW_F77_CREATE_PLAN) |
||
| 58 | (fftw_plan *p, int *n, int *idir, int *flags) |
||
| 59 | { |
||
| 60 | fftw_direction dir = *idir < 0 ? FFTW_FORWARD : FFTW_BACKWARD; |
||
| 61 | |||
| 62 | *p = fftw_create_plan(*n,dir,*flags); |
||
| 63 | } |
||
| 64 | |||
| 65 | void F77_FUNC_(fftw_f77_destroy_plan,FFTW_F77_DESTROY_PLAN) |
||
| 66 | (fftw_plan *p) |
||
| 67 | { |
||
| 68 | fftw_destroy_plan(*p); |
||
| 69 | } |
||
| 70 | |||
| 71 | void F77_FUNC_(fftw_f77,FFTW_F77) |
||
| 72 | (fftw_plan *p, int *howmany, fftw_complex *in, int *istride, int *idist, |
||
| 73 | fftw_complex *out, int *ostride, int *odist) |
||
| 74 | { |
||
| 75 | fftw(*p,*howmany,in,*istride,*idist,out,*ostride,*odist); |
||
| 76 | } |
||
| 77 | |||
| 78 | void F77_FUNC_(fftw_f77_one,FFTW_F77_ONE) |
||
| 79 | (fftw_plan *p, fftw_complex *in, fftw_complex *out) |
||
| 80 | { |
||
| 81 | fftw_one(*p,in,out); |
||
| 82 | } |
||
| 83 | |||
| 84 | void fftw_reverse_int_array(int *a, int n) |
||
| 85 | { |
||
| 86 | int i; |
||
| 87 | |||
| 88 | for (i = 0; i < n/2; ++i) { |
||
| 89 | int swap_dummy = a[i]; |
||
| 90 | a[i] = a[n - 1 - i]; |
||
| 91 | a[n - 1 - i] = swap_dummy; |
||
| 92 | } |
||
| 93 | } |
||
| 94 | |||
| 95 | void F77_FUNC_(fftwnd_f77_create_plan,FFTWND_F77_CREATE_PLAN) |
||
| 96 | (fftwnd_plan *p, int *rank, int *n, int *idir, int *flags) |
||
| 97 | { |
||
| 98 | fftw_direction dir = *idir < 0 ? FFTW_FORWARD : FFTW_BACKWARD; |
||
| 99 | |||
| 100 | fftw_reverse_int_array(n,*rank); /* column-major -> row-major */ |
||
| 101 | *p = fftwnd_create_plan(*rank,n,dir,*flags); |
||
| 102 | fftw_reverse_int_array(n,*rank); /* reverse back */ |
||
| 103 | } |
||
| 104 | |||
| 105 | void F77_FUNC_(fftw2d_f77_create_plan,FFTW2D_F77_CREATE_PLAN) |
||
| 106 | (fftwnd_plan *p, int *nx, int *ny, int *idir, int *flags) |
||
| 107 | { |
||
| 108 | fftw_direction dir = *idir < 0 ? FFTW_FORWARD : FFTW_BACKWARD; |
||
| 109 | |||
| 110 | *p = fftw2d_create_plan(*ny,*nx,dir,*flags); |
||
| 111 | } |
||
| 112 | |||
| 113 | void F77_FUNC_(fftw3d_f77_create_plan,FFTW3D_F77_CREATE_PLAN) |
||
| 114 | (fftwnd_plan *p, int *nx, int *ny, int *nz, int *idir, int *flags) |
||
| 115 | { |
||
| 116 | fftw_direction dir = *idir < 0 ? FFTW_FORWARD : FFTW_BACKWARD; |
||
| 117 | |||
| 118 | *p = fftw3d_create_plan(*nz,*ny,*nx,dir,*flags); |
||
| 119 | } |
||
| 120 | |||
| 121 | void F77_FUNC_(fftwnd_f77_destroy_plan,FFTWND_F77_DESTROY_PLAN) |
||
| 122 | (fftwnd_plan *p) |
||
| 123 | { |
||
| 124 | fftwnd_destroy_plan(*p); |
||
| 125 | } |
||
| 126 | |||
| 127 | void F77_FUNC_(fftwnd_f77,FFTWND_F77) |
||
| 128 | (fftwnd_plan *p, int *howmany, fftw_complex *in, int *istride, int *idist, |
||
| 129 | fftw_complex *out, int *ostride, int *odist) |
||
| 130 | { |
||
| 131 | fftwnd(*p,*howmany,in,*istride,*idist,out,*ostride,*odist); |
||
| 132 | } |
||
| 133 | |||
| 134 | void F77_FUNC_(fftwnd_f77_one,FFTWND_F77_ONE) |
||
| 135 | (fftwnd_plan *p, fftw_complex *in, fftw_complex *out) |
||
| 136 | { |
||
| 137 | fftwnd_one(*p,in,out); |
||
| 138 | } |
||
| 139 | |||
| 140 | /****************************************************************************/ |
||
| 141 | |||
| 142 | #ifdef __cplusplus |
||
| 143 | } /* extern "C" */ |
||
| 144 | #endif /* __cplusplus */ |
||
| 145 | |||
| 146 | #endif /* defined(F77_FUNC_) */ |