source: palm/trunk/SOURCE/cuda_fft_interfaces.f90 @ 1154

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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 1997-2012  Leibniz University Hannover
18!--------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: cuda_fft_interfaces.f90 1154 2013-05-10 14:43:15Z raasch $
27!
28! 1153 2013-05-10 14:33:08Z raasch
29! code adjustment of data types for CUDA fft required by PGI 12.3 / CUDA 5.0
30!
31! 1111 2013-03-08 23:54:10Z raasch
32! idata and odata changed from 1d- to 3d-arrays
33!
34! 1106 2013-03-04 05:31:38Z raasch
35! Initial revision
36!
37! Description:
38! ------------
39! FORTRAN interfaces for the CUDA fft
40! Routines for the fft along x and y (forward/backward) using the CUDA fft
41!--------------------------------------------------------------------------------!
42
43#if defined ( __cuda_fft )
44
45    INTEGER :: CUFFT_FORWARD = -1,  &
46               CUFFT_INVERSE =  1,  &
47               CUFFT_R2C = Z'2a',   &    ! Real to Complex (interleaved)
48               CUFFT_C2R = Z'2c',   &    ! Complex (interleaved) to Real
49               CUFFT_C2C = Z'29',   &    ! Complex to Complex, interleaved
50               CUFFT_D2Z = Z'6a',   &    ! Double to Double-Complex
51               CUFFT_Z2D = Z'6c',   &    ! Double-Complex to Double
52               CUFFT_Z2Z = Z'69'         ! Double-Complex to Double-Complex
53
54    PUBLIC
55
56
57!
58!-- cufftPlan1d( cufftHandle *plan, int nx, cufftType type, int batch )
59    INTERFACE CUFFTPLAN1D
60
61       SUBROUTINE CUFFTPLAN1D( plan, nx, type, batch ) bind( C, name='cufftPlan1d' )
62
63          USE ISO_C_BINDING
64
65          INTEGER(C_INT) ::  plan
66          INTEGER(C_INT), value ::  batch, nx, type
67
68       END SUBROUTINE CUFFTPLAN1D
69
70    END INTERFACE CUFFTPLAN1D
71
72!
73!-- cufftDestroy( cufftHandle plan )  !!! remove later if not really needed !!!
74    INTERFACE CUFFTDESTROY
75
76       SUBROUTINE CUFFTDESTROY( plan ) bind( C, name='cufftDestroy' )
77
78          USE ISO_C_BINDING
79
80          INTEGER(C_INT), value ::  plan
81
82       END SUBROUTINE CUFFTDESTROY
83
84    END INTERFACE CUFFTDESTROY
85
86
87    INTERFACE CUFFTEXECZ2D
88
89       SUBROUTINE CUFFTEXECZ2D( plan, idata, odata ) bind( C, name='cufftExecZ2D' )
90
91          USE ISO_C_BINDING
92
93          INTEGER(C_INT)            ::  plan
94          COMPLEX(C_DOUBLE_COMPLEX) ::  idata(:,:,:)
95          REAL(C_DOUBLE)            ::  odata(:,:,:)
96
97       END SUBROUTINE CUFFTEXECZ2D
98
99    END INTERFACE CUFFTEXECZ2D
100
101
102    INTERFACE CUFFTEXECD2Z
103
104       SUBROUTINE CUFFTEXECD2Z( plan, idata, odata ) bind( C, name='cufftExecD2Z' )
105
106          USE ISO_C_BINDING
107
108          INTEGER(C_INT)            ::  plan
109          REAL(C_DOUBLE)            ::  idata(:,:,:)
110          COMPLEX(C_DOUBLE_COMPLEX) ::  odata(:,:,:)
111
112       END SUBROUTINE CUFFTEXECD2Z
113
114    END INTERFACE CUFFTEXECD2Z
115
116#endif
117 END MODULE cuda_fft_interfaces
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