source: palm/trunk/SOURCE/cuda_fft_interfaces.f90 @ 1321

Last change on this file since 1321 was 1321, checked in by raasch, 7 years ago

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1 MODULE cuda_fft_interfaces
2
3!--------------------------------------------------------------------------------!
4! This file is part of PALM.
5!
6! PALM is free software: you can redistribute it and/or modify it under the terms
7! of the GNU General Public License as published by the Free Software Foundation,
8! either version 3 of the License, or (at your option) any later version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 1997-2014 Leibniz Universitaet Hannover
18!--------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: cuda_fft_interfaces.f90 1321 2014-03-20 09:40:40Z raasch $
27!
28! 1320 2014-03-20 08:40:49Z raasch
29! Kind-parameters added to all INTEGER and REAL declaration statements,
30! kinds are defined in new module kinds,
31! old module precision_kind is removed,
32! revision history before 2012 removed,
33! comment fields (!:) to be used for variable explanations added to
34! all variable declaration statements
35!
36! 1224 2013-09-16 07:27:23Z raasch
37! dummy interface added to avoid compiler warnings
38!
39! 1166 2013-05-24 13:55:44Z raasch
40! C_DOUBLE/COMPLEX reset to dpk,
41! DEVICE attribut added to idata/odata arguments
42!
43! 1153 2013-05-10 14:33:08Z raasch
44! code adjustment of data types for CUDA fft required by PGI 12.3 / CUDA 5.0
45!
46! 1111 2013-03-08 23:54:10Z raasch
47! idata and odata changed from 1d- to 3d-arrays
48!
49! 1106 2013-03-04 05:31:38Z raasch
50! Initial revision
51!
52! Description:
53! ------------
54! FORTRAN interfaces for the CUDA fft
55! Routines for the fft along x and y (forward/backward) using the CUDA fft
56!--------------------------------------------------------------------------------!
57
58#if defined ( __cuda_fft )
59
60    INTEGER(iwp) ::  CUFFT_FORWARD = -1   !:
61    INTEGER(iwp) ::  CUFFT_INVERSE =  1   !:
62    INTEGER(iwp) ::  CUFFT_R2C = Z'2a'    !: Real to Complex (interleaved)
63    INTEGER(iwp) ::  CUFFT_C2R = Z'2c'    !: Complex (interleaved) to Real
64    INTEGER(iwp) ::  CUFFT_C2C = Z'29'    !: Complex to Complex, interleaved
65    INTEGER(iwp) ::  CUFFT_D2Z = Z'6a'    !: Double to Double-Complex
66    INTEGER(iwp) ::  CUFFT_Z2D = Z'6c'    !: Double-Complex to Double
67    INTEGER(iwp) ::  CUFFT_Z2Z = Z'69'    !: Double-Complex to Double-Complex
68
69    PUBLIC
70
71
72!
73!-- cufftPlan1d( cufftHandle *plan, int nx, cufftType type, int batch )
74    INTERFACE CUFFTPLAN1D
75
76       SUBROUTINE CUFFTPLAN1D( plan, nx, type, batch ) bind( C, name='cufftPlan1d' )
77
78          USE ISO_C_BINDING
79
80          INTEGER(C_INT)        ::  plan   !:
81          INTEGER(C_INT), value ::  batch  !:
82          INTEGER(C_INT), value ::  nx     !:
83          INTEGER(C_INT), value ::  type   !:
84       END SUBROUTINE CUFFTPLAN1D
85
86    END INTERFACE CUFFTPLAN1D
87
88!
89!-- cufftDestroy( cufftHandle plan )  !!! remove later if not really needed !!!
90    INTERFACE CUFFTDESTROY
91
92       SUBROUTINE CUFFTDESTROY( plan ) bind( C, name='cufftDestroy' )
93
94          USE ISO_C_BINDING
95
96          INTEGER(C_INT), VALUE ::  plan
97
98       END SUBROUTINE CUFFTDESTROY
99
100    END INTERFACE CUFFTDESTROY
101
102
103    INTERFACE CUFFTEXECZ2D
104
105       SUBROUTINE CUFFTEXECZ2D( plan, idata, odata ) bind( C, name='cufftExecZ2D' )
106
107          USE ISO_C_BINDING
108          USE kinds
109
110          INTEGER(C_INT), VALUE ::  plan          !:
111          COMPLEX(dp), DEVICE   ::  idata(:,:,:)  !:
112          REAL(dp), DEVICE      ::  odata(:,:,:)  !:
113
114       END SUBROUTINE CUFFTEXECZ2D
115
116    END INTERFACE CUFFTEXECZ2D
117
118
119    INTERFACE CUFFTEXECD2Z
120
121       SUBROUTINE CUFFTEXECD2Z( plan, idata, odata ) bind( C, name='cufftExecD2Z' )
122
123          USE ISO_C_BINDING
124         
125          USE kinds
126
127          INTEGER(C_INT), VALUE ::  plan          !:
128          REAL(dp), DEVICE      ::  idata(:,:,:)  !:
129          COMPLEX(dp), DEVICE   ::  odata(:,:,:)  !:
130
131       END SUBROUTINE CUFFTEXECD2Z
132
133    END INTERFACE CUFFTEXECD2Z
134
135#else
136
137!
138!-- Dummy interface to avoid compiler warnings in case of no bublic objects
139!-- declared
140    INTERFACE CUFFTdummy
141
142       SUBROUTINE CUFFTdummy( dummy )
143       
144          USE kinds
145
146          REAL(wp) ::  dummy  !:
147
148       END SUBROUTINE CUFFTdummy
149
150    END INTERFACE CUFFTdummy
151
152#endif
153
154 END MODULE cuda_fft_interfaces
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