source: palm/trunk/SOURCE/cuda_fft_interfaces_mod.f90 @ 1952

Last change on this file since 1952 was 1851, checked in by maronga, 8 years ago

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1!> @file cuda_fft_interfaces_mod.f90
2!--------------------------------------------------------------------------------!
3! This file is part of PALM.
4!
5! PALM is free software: you can redistribute it and/or modify it under the terms
6! of the GNU General Public License as published by the Free Software Foundation,
7! either version 3 of the License, or (at your option) any later version.
8!
9! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
12!
13! You should have received a copy of the GNU General Public License along with
14! PALM. If not, see <http://www.gnu.org/licenses/>.
15!
16! Copyright 1997-2016 Leibniz Universitaet Hannover
17!--------------------------------------------------------------------------------!
18!
19! Current revisions:
20! -----------------
21!
22!
23! Former revisions:
24! -----------------
25! $Id: cuda_fft_interfaces_mod.f90 1851 2016-04-08 13:32:50Z suehring $
26!
27! 1850 2016-04-08 13:29:27Z maronga
28! Module renamed
29!
30!
31! 1682 2015-10-07 23:56:08Z knoop
32! Code annotations made doxygen readable
33!
34! 1374 2014-04-25 12:55:07Z raasch
35! bugfix: missing module kinds added
36!
37! 1320 2014-03-20 08:40:49Z raasch
38! Kind-parameters added to all INTEGER and REAL declaration statements,
39! kinds are defined in new module kinds,
40! old module precision_kind is removed,
41! revision history before 2012 removed,
42! comment fields (!:) to be used for variable explanations added to
43! all variable declaration statements
44!
45! 1224 2013-09-16 07:27:23Z raasch
46! dummy interface added to avoid compiler warnings
47!
48! 1166 2013-05-24 13:55:44Z raasch
49! C_DOUBLE/COMPLEX reset to dpk,
50! DEVICE attribut added to idata/odata arguments
51!
52! 1153 2013-05-10 14:33:08Z raasch
53! code adjustment of data types for CUDA fft required by PGI 12.3 / CUDA 5.0
54!
55! 1111 2013-03-08 23:54:10Z raasch
56! idata and odata changed from 1d- to 3d-arrays
57!
58! 1106 2013-03-04 05:31:38Z raasch
59! Initial revision
60!
61! Description:
62! ------------
63!> FORTRAN interfaces for the CUDA fft
64!> Routines for the fft along x and y (forward/backward) using the CUDA fft
65!--------------------------------------------------------------------------------!
66 MODULE cuda_fft_interfaces
67 
68
69#if defined ( __cuda_fft )
70
71    USE kinds
72
73    INTEGER(iwp) ::  CUFFT_FORWARD = -1   !<
74    INTEGER(iwp) ::  CUFFT_INVERSE =  1   !<
75    INTEGER(iwp) ::  CUFFT_R2C = Z'2a'    !< Real to Complex (interleaved)
76    INTEGER(iwp) ::  CUFFT_C2R = Z'2c'    !< Complex (interleaved) to Real
77    INTEGER(iwp) ::  CUFFT_C2C = Z'29'    !< Complex to Complex, interleaved
78    INTEGER(iwp) ::  CUFFT_D2Z = Z'6a'    !< Double to Double-Complex
79    INTEGER(iwp) ::  CUFFT_Z2D = Z'6c'    !< Double-Complex to Double
80    INTEGER(iwp) ::  CUFFT_Z2Z = Z'69'    !< Double-Complex to Double-Complex
81
82    PUBLIC
83
84
85!
86!-- cufftPlan1d( cufftHandle *plan, int nx, cufftType type, int batch )
87    INTERFACE CUFFTPLAN1D
88
89!------------------------------------------------------------------------------!
90! Description:
91! ------------
92!> @todo Missing subroutine description.
93!------------------------------------------------------------------------------!
94       SUBROUTINE CUFFTPLAN1D( plan, nx, type, batch ) bind( C, name='cufftPlan1d' )
95
96          USE ISO_C_BINDING
97
98          INTEGER(C_INT)        ::  plan   !<
99          INTEGER(C_INT), value ::  batch  !<
100          INTEGER(C_INT), value ::  nx     !<
101          INTEGER(C_INT), value ::  type   !<
102       END SUBROUTINE CUFFTPLAN1D
103
104    END INTERFACE CUFFTPLAN1D
105
106!
107!-- cufftDestroy( cufftHandle plan )  !!! remove later if not really needed !!!
108    INTERFACE CUFFTDESTROY
109
110!------------------------------------------------------------------------------!
111! Description:
112! ------------
113!> @todo Missing subroutine description.
114!------------------------------------------------------------------------------!
115       SUBROUTINE CUFFTDESTROY( plan ) bind( C, name='cufftDestroy' )
116
117          USE ISO_C_BINDING
118
119          INTEGER(C_INT), VALUE ::  plan
120
121       END SUBROUTINE CUFFTDESTROY
122
123    END INTERFACE CUFFTDESTROY
124
125
126    INTERFACE CUFFTEXECZ2D
127
128!------------------------------------------------------------------------------!
129! Description:
130! ------------
131!> @todo Missing subroutine description.
132!------------------------------------------------------------------------------!
133       SUBROUTINE CUFFTEXECZ2D( plan, idata, odata ) bind( C, name='cufftExecZ2D' )
134
135          USE ISO_C_BINDING
136          USE kinds
137
138          INTEGER(C_INT), VALUE ::  plan          !<
139          COMPLEX(dp), DEVICE   ::  idata(:,:,:)  !<
140          REAL(dp), DEVICE      ::  odata(:,:,:)  !<
141
142       END SUBROUTINE CUFFTEXECZ2D
143
144    END INTERFACE CUFFTEXECZ2D
145
146
147    INTERFACE CUFFTEXECD2Z
148
149!------------------------------------------------------------------------------!
150! Description:
151! ------------
152!> @todo Missing subroutine description.
153!------------------------------------------------------------------------------!
154       SUBROUTINE CUFFTEXECD2Z( plan, idata, odata ) bind( C, name='cufftExecD2Z' )
155
156          USE ISO_C_BINDING
157         
158          USE kinds
159
160          INTEGER(C_INT), VALUE ::  plan          !<
161          REAL(dp), DEVICE      ::  idata(:,:,:)  !<
162          COMPLEX(dp), DEVICE   ::  odata(:,:,:)  !<
163
164       END SUBROUTINE CUFFTEXECD2Z
165
166    END INTERFACE CUFFTEXECD2Z
167
168#else
169
170    INTERFACE CUFFTdummy
171
172!------------------------------------------------------------------------------!
173! Description:
174! ------------
175!> Dummy interface to avoid compiler warnings in case of no bublic objects
176!> declared.
177!------------------------------------------------------------------------------!
178       SUBROUTINE CUFFTdummy( dummy )
179       
180          USE kinds
181
182          REAL(wp) ::  dummy  !<
183
184       END SUBROUTINE CUFFTdummy
185
186    END INTERFACE CUFFTdummy
187
188#endif
189
190 END MODULE cuda_fft_interfaces
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