[1] | 1 | MODULE fft_xy |
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| 2 | |
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[1036] | 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later version. |
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| 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the 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 along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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[1310] | 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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[1036] | 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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[254] | 20 | ! Current revisions: |
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[1] | 21 | ! ----------------- |
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[1321] | 22 | ! |
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| 23 | ! |
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| 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: fft_xy.f90 1321 2014-03-20 09:40:40Z raasch $ |
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| 27 | ! |
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| 28 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 29 | ! ONLY-attribute added to USE-statements, |
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| 30 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 31 | ! kinds are defined in new module kinds, |
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| 32 | ! old module precision_kind is removed, |
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| 33 | ! revision history before 2012 removed, |
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| 34 | ! comment fields (!:) to be used for variable explanations added to |
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| 35 | ! all variable declaration statements |
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[1] | 36 | ! |
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[1305] | 37 | ! 1304 2014-03-12 10:29:42Z raasch |
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| 38 | ! openmp bugfix: work1 used in Temperton algorithm must be private |
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| 39 | ! |
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[1258] | 40 | ! 1257 2013-11-08 15:18:40Z raasch |
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| 41 | ! openacc loop and loop vector clauses removed, declare create moved after |
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| 42 | ! the FORTRAN declaration statement |
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| 43 | ! |
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[1220] | 44 | ! 1219 2013-08-30 09:33:18Z heinze |
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| 45 | ! bugfix: use own branch for fftw |
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| 46 | ! |
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[1217] | 47 | ! 1216 2013-08-26 09:31:42Z raasch |
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| 48 | ! fft_x and fft_y modified for parallel / ovverlapping execution of fft and |
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| 49 | ! transpositions, |
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| 50 | ! fftw implemented for 1d-decomposition (fft_x_1d, fft_y_1d) |
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| 51 | ! |
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[1211] | 52 | ! 1210 2013-08-14 10:58:20Z raasch |
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| 53 | ! fftw added |
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| 54 | ! |
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[1167] | 55 | ! 1166 2013-05-24 13:55:44Z raasch |
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| 56 | ! C_DOUBLE/COMPLEX reset to dpk |
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| 57 | ! |
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[1154] | 58 | ! 1153 2013-05-10 14:33:08Z raasch |
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| 59 | ! code adjustment of data types for CUDA fft required by PGI 12.3 / CUDA 5.0 |
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| 60 | ! |
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[1112] | 61 | ! 1111 2013-03-08 23:54:10Z raasch |
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| 62 | ! further openACC statements added, CUDA branch completely runs on GPU |
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| 63 | ! bugfix: CUDA fft plans adjusted for domain decomposition (before they always |
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| 64 | ! used total domain) |
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| 65 | ! |
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[1107] | 66 | ! 1106 2013-03-04 05:31:38Z raasch |
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| 67 | ! CUDA fft added |
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| 68 | ! array_kind renamed precision_kind, 3D- instead of 1D-loops in fft_x and fft_y |
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| 69 | ! old fft_x, fft_y become fft_x_1d, fft_y_1d and are used for 1D-decomposition |
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| 70 | ! |
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[1093] | 71 | ! 1092 2013-02-02 11:24:22Z raasch |
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| 72 | ! variable sizw declared for NEC case only |
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| 73 | ! |
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[1037] | 74 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 75 | ! code put under GPL (PALM 3.9) |
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| 76 | ! |
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[1] | 77 | ! Revision 1.1 2002/06/11 13:00:49 raasch |
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| 78 | ! Initial revision |
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| 79 | ! |
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| 80 | ! |
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| 81 | ! Description: |
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| 82 | ! ------------ |
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| 83 | ! Fast Fourier transformation along x and y for 1d domain decomposition along x. |
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| 84 | ! Original version: Klaus Ketelsen (May 2002) |
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| 85 | !------------------------------------------------------------------------------! |
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| 86 | |
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[1320] | 87 | USE control_parameters, & |
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| 88 | ONLY: fft_method, message_string |
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| 89 | |
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| 90 | USE indices, & |
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| 91 | ONLY: nx, ny, nz |
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| 92 | |
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[1153] | 93 | #if defined( __cuda_fft ) |
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| 94 | USE ISO_C_BINDING |
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[1210] | 95 | #elif defined( __fftw ) |
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| 96 | USE, INTRINSIC :: ISO_C_BINDING |
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[1153] | 97 | #endif |
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[1320] | 98 | |
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| 99 | USE kinds |
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| 100 | |
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| 101 | USE singleton, & |
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| 102 | ONLY: fftn |
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| 103 | |
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[1] | 104 | USE temperton_fft |
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[1320] | 105 | |
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| 106 | USE transpose_indices, & |
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| 107 | ONLY: nyn_x, nys_x, nzb_x, nzb_y, nzt_x, nzt_y |
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[1] | 108 | |
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| 109 | IMPLICIT NONE |
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| 110 | |
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| 111 | PRIVATE |
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[1106] | 112 | PUBLIC fft_x, fft_x_1d, fft_y, fft_y_1d, fft_init, fft_x_m, fft_y_m |
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[1] | 113 | |
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[1320] | 114 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE, SAVE :: ifax_x !: |
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| 115 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE, SAVE :: ifax_y !: |
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[1] | 116 | |
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[1320] | 117 | LOGICAL, SAVE :: init_fft = .FALSE. !: |
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[1] | 118 | |
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[1320] | 119 | REAL(wp), SAVE :: dnx !: |
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| 120 | REAL(wp), SAVE :: dny !: |
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| 121 | REAL(wp), SAVE :: sqr_dnx !: |
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| 122 | REAL(wp), SAVE :: sqr_dny !: |
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| 123 | |
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| 124 | REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: trigs_x !: |
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| 125 | REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: trigs_y !: |
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[1] | 126 | |
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| 127 | #if defined( __ibm ) |
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[1320] | 128 | INTEGER(iwp), PARAMETER :: nau1 = 20000 !: |
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| 129 | INTEGER(iwp), PARAMETER :: nau2 = 22000 !: |
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[1] | 130 | ! |
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| 131 | !-- The following working arrays contain tables and have to be "save" and |
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| 132 | !-- shared in OpenMP sense |
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[1320] | 133 | REAL(wp), DIMENSION(nau1), SAVE :: aux1 !: |
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| 134 | REAL(wp), DIMENSION(nau1), SAVE :: auy1 !: |
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| 135 | REAL(wp), DIMENSION(nau1), SAVE :: aux3 !: |
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| 136 | REAL(wp), DIMENSION(nau1), SAVE :: auy3 !: |
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| 137 | |
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[1] | 138 | #elif defined( __nec ) |
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[1320] | 139 | INTEGER(iwp), SAVE :: nz1 !: |
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| 140 | |
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| 141 | REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: trig_xb !: |
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| 142 | REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: trig_xf !: |
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| 143 | REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: trig_yb !: |
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| 144 | REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: trig_yf !: |
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| 145 | |
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[1106] | 146 | #elif defined( __cuda_fft ) |
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[1320] | 147 | INTEGER(C_INT), SAVE :: plan_xf !: |
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| 148 | INTEGER(C_INT), SAVE :: plan_xi !: |
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| 149 | INTEGER(C_INT), SAVE :: plan_yf !: |
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| 150 | INTEGER(C_INT), SAVE :: plan_yi !: |
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| 151 | |
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| 152 | INTEGER(iwp), SAVE :: total_points_x_transpo !: |
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| 153 | INTEGER(iwp), SAVE :: total_points_y_transpo !: |
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[1219] | 154 | #endif |
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| 155 | |
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| 156 | #if defined( __fftw ) |
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[1210] | 157 | INCLUDE 'fftw3.f03' |
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[1320] | 158 | INTEGER(KIND=C_INT) :: nx_c !: |
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| 159 | INTEGER(KIND=C_INT) :: ny_c !: |
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| 160 | |
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| 161 | COMPLEX(KIND=C_DOUBLE_COMPLEX), DIMENSION(:), ALLOCATABLE, SAVE :: & |
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| 162 | x_out !: |
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| 163 | COMPLEX(KIND=C_DOUBLE_COMPLEX), DIMENSION(:), ALLOCATABLE, SAVE :: & |
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| 164 | y_out !: |
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| 165 | |
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| 166 | REAL(KIND=C_DOUBLE), DIMENSION(:), ALLOCATABLE, SAVE :: & |
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| 167 | x_in !: |
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| 168 | REAL(KIND=C_DOUBLE), DIMENSION(:), ALLOCATABLE, SAVE :: & |
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| 169 | y_in !: |
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| 170 | |
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| 171 | |
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[1210] | 172 | TYPE(C_PTR), SAVE :: plan_xf, plan_xi, plan_yf, plan_yi |
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[1] | 173 | #endif |
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| 174 | |
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| 175 | ! |
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| 176 | !-- Public interfaces |
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| 177 | INTERFACE fft_init |
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| 178 | MODULE PROCEDURE fft_init |
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| 179 | END INTERFACE fft_init |
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| 180 | |
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| 181 | INTERFACE fft_x |
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| 182 | MODULE PROCEDURE fft_x |
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| 183 | END INTERFACE fft_x |
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| 184 | |
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[1106] | 185 | INTERFACE fft_x_1d |
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| 186 | MODULE PROCEDURE fft_x_1d |
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| 187 | END INTERFACE fft_x_1d |
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| 188 | |
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[1] | 189 | INTERFACE fft_y |
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| 190 | MODULE PROCEDURE fft_y |
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| 191 | END INTERFACE fft_y |
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| 192 | |
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[1106] | 193 | INTERFACE fft_y_1d |
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| 194 | MODULE PROCEDURE fft_y_1d |
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| 195 | END INTERFACE fft_y_1d |
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| 196 | |
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[1] | 197 | INTERFACE fft_x_m |
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| 198 | MODULE PROCEDURE fft_x_m |
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| 199 | END INTERFACE fft_x_m |
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| 200 | |
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| 201 | INTERFACE fft_y_m |
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| 202 | MODULE PROCEDURE fft_y_m |
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| 203 | END INTERFACE fft_y_m |
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| 204 | |
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| 205 | CONTAINS |
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| 206 | |
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| 207 | |
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| 208 | SUBROUTINE fft_init |
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| 209 | |
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[1106] | 210 | USE cuda_fft_interfaces |
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| 211 | |
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[1] | 212 | IMPLICIT NONE |
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| 213 | |
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| 214 | ! |
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| 215 | !-- The following temporary working arrays have to be on stack or private |
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| 216 | !-- in OpenMP sense |
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| 217 | #if defined( __ibm ) |
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[1320] | 218 | REAL(wp), DIMENSION(0:nx+2) :: workx !: |
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| 219 | REAL(wp), DIMENSION(0:ny+2) :: worky !: |
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| 220 | REAL(wp), DIMENSION(nau2) :: aux2 !: |
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| 221 | REAL(wp), DIMENSION(nau2) :: auy2 !: |
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| 222 | REAL(wp), DIMENSION(nau2) :: aux4 !: |
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| 223 | REAL(wp), DIMENSION(nau2) :: auy4 !: |
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[1] | 224 | #elif defined( __nec ) |
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[1320] | 225 | REAL(wp), DIMENSION(0:nx+3,nz+1) :: work_x !: |
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| 226 | REAL(wp), DIMENSION(0:ny+3,nz+1) :: work_y !: |
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| 227 | REAL(wp), DIMENSION(6*(nx+3),nz+1) :: workx !: |
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| 228 | REAL(wp), DIMENSION(6*(ny+3),nz+1) :: worky !: |
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[1] | 229 | #endif |
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| 230 | |
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| 231 | ! |
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| 232 | !-- Return, if already called |
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| 233 | IF ( init_fft ) THEN |
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| 234 | RETURN |
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| 235 | ELSE |
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| 236 | init_fft = .TRUE. |
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| 237 | ENDIF |
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| 238 | |
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| 239 | IF ( fft_method == 'system-specific' ) THEN |
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| 240 | |
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[1106] | 241 | dnx = 1.0 / ( nx + 1.0 ) |
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| 242 | dny = 1.0 / ( ny + 1.0 ) |
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| 243 | sqr_dnx = SQRT( dnx ) |
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| 244 | sqr_dny = SQRT( dny ) |
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[1] | 245 | #if defined( __ibm ) && ! defined( __ibmy_special ) |
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| 246 | ! |
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| 247 | !-- Initialize tables for fft along x |
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[1106] | 248 | CALL DRCFT( 1, workx, 1, workx, 1, nx+1, 1, 1, sqr_dnx, aux1, nau1, & |
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[1] | 249 | aux2, nau2 ) |
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[1106] | 250 | CALL DCRFT( 1, workx, 1, workx, 1, nx+1, 1, -1, sqr_dnx, aux3, nau1, & |
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[1] | 251 | aux4, nau2 ) |
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| 252 | ! |
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| 253 | !-- Initialize tables for fft along y |
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[1106] | 254 | CALL DRCFT( 1, worky, 1, worky, 1, ny+1, 1, 1, sqr_dny, auy1, nau1, & |
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[1] | 255 | auy2, nau2 ) |
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[1106] | 256 | CALL DCRFT( 1, worky, 1, worky, 1, ny+1, 1, -1, sqr_dny, auy3, nau1, & |
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[1] | 257 | auy4, nau2 ) |
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| 258 | #elif defined( __nec ) |
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[254] | 259 | message_string = 'fft method "' // TRIM( fft_method) // & |
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| 260 | '" currently does not work on NEC' |
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| 261 | CALL message( 'fft_init', 'PA0187', 1, 2, 0, 6, 0 ) |
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[1] | 262 | |
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[1320] | 263 | ALLOCATE( trig_xb(2*(nx+1)), trig_xf(2*(nx+1)), & |
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[1] | 264 | trig_yb(2*(ny+1)), trig_yf(2*(ny+1)) ) |
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| 265 | |
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| 266 | work_x = 0.0 |
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| 267 | work_y = 0.0 |
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| 268 | nz1 = nz + MOD( nz+1, 2 ) ! odd nz slows down fft significantly |
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| 269 | ! when using the NEC ffts |
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| 270 | |
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| 271 | ! |
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| 272 | !-- Initialize tables for fft along x (non-vector and vector case (M)) |
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[1106] | 273 | CALL DZFFT( 0, nx+1, sqr_dnx, work_x, work_x, trig_xf, workx, 0 ) |
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| 274 | CALL ZDFFT( 0, nx+1, sqr_dnx, work_x, work_x, trig_xb, workx, 0 ) |
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[1320] | 275 | CALL DZFFTM( 0, nx+1, nz1, sqr_dnx, work_x, nx+4, work_x, nx+4, & |
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[1] | 276 | trig_xf, workx, 0 ) |
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[1320] | 277 | CALL ZDFFTM( 0, nx+1, nz1, sqr_dnx, work_x, nx+4, work_x, nx+4, & |
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[1] | 278 | trig_xb, workx, 0 ) |
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| 279 | ! |
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| 280 | !-- Initialize tables for fft along y (non-vector and vector case (M)) |
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[1106] | 281 | CALL DZFFT( 0, ny+1, sqr_dny, work_y, work_y, trig_yf, worky, 0 ) |
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| 282 | CALL ZDFFT( 0, ny+1, sqr_dny, work_y, work_y, trig_yb, worky, 0 ) |
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[1320] | 283 | CALL DZFFTM( 0, ny+1, nz1, sqr_dny, work_y, ny+4, work_y, ny+4, & |
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[1] | 284 | trig_yf, worky, 0 ) |
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[1320] | 285 | CALL ZDFFTM( 0, ny+1, nz1, sqr_dny, work_y, ny+4, work_y, ny+4, & |
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[1] | 286 | trig_yb, worky, 0 ) |
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[1106] | 287 | #elif defined( __cuda_fft ) |
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| 288 | total_points_x_transpo = (nx+1) * (nyn_x-nys_x+1) * (nzt_x-nzb_x+1) |
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| 289 | total_points_y_transpo = (ny+1) * (nxr_y-nxl_y+1) * (nzt_y-nzb_y+1) |
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[1111] | 290 | CALL CUFFTPLAN1D( plan_xf, nx+1, CUFFT_D2Z, (nyn_x-nys_x+1) * (nzt_x-nzb_x+1) ) |
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| 291 | CALL CUFFTPLAN1D( plan_xi, nx+1, CUFFT_Z2D, (nyn_x-nys_x+1) * (nzt_x-nzb_x+1) ) |
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| 292 | CALL CUFFTPLAN1D( plan_yf, ny+1, CUFFT_D2Z, (nxr_y-nxl_y+1) * (nzt_y-nzb_y+1) ) |
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| 293 | CALL CUFFTPLAN1D( plan_yi, ny+1, CUFFT_Z2D, (nxr_y-nxl_y+1) * (nzt_y-nzb_y+1) ) |
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[1] | 294 | #else |
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[254] | 295 | message_string = 'no system-specific fft-call available' |
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| 296 | CALL message( 'fft_init', 'PA0188', 1, 2, 0, 6, 0 ) |
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[1] | 297 | #endif |
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| 298 | ELSEIF ( fft_method == 'temperton-algorithm' ) THEN |
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| 299 | ! |
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| 300 | !-- Temperton-algorithm |
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| 301 | !-- Initialize tables for fft along x and y |
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| 302 | ALLOCATE( ifax_x(nx+1), ifax_y(ny+1), trigs_x(nx+1), trigs_y(ny+1) ) |
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| 303 | |
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| 304 | CALL set99( trigs_x, ifax_x, nx+1 ) |
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| 305 | CALL set99( trigs_y, ifax_y, ny+1 ) |
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| 306 | |
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[1210] | 307 | ELSEIF ( fft_method == 'fftw' ) THEN |
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| 308 | ! |
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| 309 | !-- FFTW |
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| 310 | #if defined( __fftw ) |
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| 311 | nx_c = nx+1 |
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| 312 | ny_c = ny+1 |
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[1320] | 313 | ALLOCATE( x_in(0:nx+2), y_in(0:ny+2), x_out(0:(nx+1)/2), & |
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[1210] | 314 | y_out(0:(ny+1)/2) ) |
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| 315 | plan_xf = FFTW_PLAN_DFT_R2C_1D( nx_c, x_in, x_out, FFTW_ESTIMATE ) |
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| 316 | plan_xi = FFTW_PLAN_DFT_C2R_1D( nx_c, x_out, x_in, FFTW_ESTIMATE ) |
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| 317 | plan_yf = FFTW_PLAN_DFT_R2C_1D( ny_c, y_in, y_out, FFTW_ESTIMATE ) |
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| 318 | plan_yi = FFTW_PLAN_DFT_C2R_1D( ny_c, y_out, y_in, FFTW_ESTIMATE ) |
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| 319 | #else |
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| 320 | message_string = 'preprocessor switch for fftw is missing' |
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| 321 | CALL message( 'fft_init', 'PA0080', 1, 2, 0, 6, 0 ) |
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| 322 | #endif |
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| 323 | |
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[1] | 324 | ELSEIF ( fft_method == 'singleton-algorithm' ) THEN |
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| 325 | |
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| 326 | CONTINUE |
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| 327 | |
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| 328 | ELSE |
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| 329 | |
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[254] | 330 | message_string = 'fft method "' // TRIM( fft_method) // & |
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| 331 | '" not available' |
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| 332 | CALL message( 'fft_init', 'PA0189', 1, 2, 0, 6, 0 ) |
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[1] | 333 | ENDIF |
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| 334 | |
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| 335 | END SUBROUTINE fft_init |
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| 336 | |
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| 337 | |
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[1216] | 338 | SUBROUTINE fft_x( ar, direction, ar_2d ) |
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[1] | 339 | |
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| 340 | !----------------------------------------------------------------------! |
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| 341 | ! fft_x ! |
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| 342 | ! ! |
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| 343 | ! Fourier-transformation along x-direction ! |
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[1106] | 344 | ! Version for 2D-decomposition ! |
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[1] | 345 | ! ! |
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| 346 | ! fft_x uses internal algorithms (Singleton or Temperton) or ! |
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| 347 | ! system-specific routines, if they are available ! |
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| 348 | !----------------------------------------------------------------------! |
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| 349 | |
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[1106] | 350 | USE cuda_fft_interfaces |
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[1153] | 351 | #if defined( __cuda_fft ) |
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| 352 | USE ISO_C_BINDING |
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| 353 | #endif |
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[1106] | 354 | |
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[1] | 355 | IMPLICIT NONE |
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| 356 | |
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[1320] | 357 | CHARACTER (LEN=*) :: direction !: |
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| 358 | |
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| 359 | COMPLEX(wp), DIMENSION(:), ALLOCATABLE :: cwork !: |
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[1106] | 360 | |
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[1320] | 361 | INTEGER(iwp) :: i !: |
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| 362 | INTEGER(iwp) :: ishape(1) !: |
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| 363 | INTEGER(iwp) :: j !: |
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| 364 | INTEGER(iwp) :: k !: |
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[1106] | 365 | |
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[1320] | 366 | LOGICAL :: forward_fft !: |
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| 367 | |
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| 368 | REAL(wp), DIMENSION(0:nx+2) :: work !: |
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| 369 | REAL(wp), DIMENSION(nx+2) :: work1 !: |
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| 370 | |
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[1106] | 371 | #if defined( __ibm ) |
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[1320] | 372 | REAL(wp), DIMENSION(nau2) :: aux2 !: |
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| 373 | REAL(wp), DIMENSION(nau2) :: aux4 !: |
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[1106] | 374 | #elif defined( __nec ) |
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[1320] | 375 | REAL(wp), DIMENSION(6*(nx+1)) :: work2 !: |
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[1106] | 376 | #elif defined( __cuda_fft ) |
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[1320] | 377 | COMPLEX(dpk), DIMENSION(0:(nx+1)/2,nys_x:nyn_x,nzb_x:nzt_x) :: & |
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| 378 | ar_tmp !: |
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[1111] | 379 | !$acc declare create( ar_tmp ) |
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[1106] | 380 | #endif |
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| 381 | |
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[1320] | 382 | REAL(wp), DIMENSION(0:nx,nys_x:nyn_x), OPTIONAL :: & |
---|
| 383 | ar_2d !: |
---|
| 384 | REAL(wp), DIMENSION(0:nx,nys_x:nyn_x,nzb_x:nzt_x) :: & |
---|
| 385 | ar !: |
---|
| 386 | |
---|
[1106] | 387 | IF ( direction == 'forward' ) THEN |
---|
| 388 | forward_fft = .TRUE. |
---|
| 389 | ELSE |
---|
| 390 | forward_fft = .FALSE. |
---|
| 391 | ENDIF |
---|
| 392 | |
---|
| 393 | IF ( fft_method == 'singleton-algorithm' ) THEN |
---|
| 394 | |
---|
| 395 | ! |
---|
| 396 | !-- Performing the fft with singleton's software works on every system, |
---|
| 397 | !-- since it is part of the model |
---|
| 398 | ALLOCATE( cwork(0:nx) ) |
---|
| 399 | |
---|
| 400 | IF ( forward_fft ) then |
---|
| 401 | |
---|
| 402 | !$OMP PARALLEL PRIVATE ( cwork, i, ishape, j, k ) |
---|
| 403 | !$OMP DO |
---|
| 404 | DO k = nzb_x, nzt_x |
---|
| 405 | DO j = nys_x, nyn_x |
---|
| 406 | |
---|
| 407 | DO i = 0, nx |
---|
| 408 | cwork(i) = CMPLX( ar(i,j,k) ) |
---|
| 409 | ENDDO |
---|
| 410 | |
---|
| 411 | ishape = SHAPE( cwork ) |
---|
| 412 | CALL FFTN( cwork, ishape ) |
---|
| 413 | |
---|
| 414 | DO i = 0, (nx+1)/2 |
---|
| 415 | ar(i,j,k) = REAL( cwork(i) ) |
---|
| 416 | ENDDO |
---|
| 417 | DO i = 1, (nx+1)/2 - 1 |
---|
| 418 | ar(nx+1-i,j,k) = -AIMAG( cwork(i) ) |
---|
| 419 | ENDDO |
---|
| 420 | |
---|
| 421 | ENDDO |
---|
| 422 | ENDDO |
---|
| 423 | !$OMP END PARALLEL |
---|
| 424 | |
---|
| 425 | ELSE |
---|
| 426 | |
---|
| 427 | !$OMP PARALLEL PRIVATE ( cwork, i, ishape, j, k ) |
---|
| 428 | !$OMP DO |
---|
| 429 | DO k = nzb_x, nzt_x |
---|
| 430 | DO j = nys_x, nyn_x |
---|
| 431 | |
---|
| 432 | cwork(0) = CMPLX( ar(0,j,k), 0.0 ) |
---|
| 433 | DO i = 1, (nx+1)/2 - 1 |
---|
| 434 | cwork(i) = CMPLX( ar(i,j,k), -ar(nx+1-i,j,k) ) |
---|
| 435 | cwork(nx+1-i) = CMPLX( ar(i,j,k), ar(nx+1-i,j,k) ) |
---|
| 436 | ENDDO |
---|
| 437 | cwork((nx+1)/2) = CMPLX( ar((nx+1)/2,j,k), 0.0 ) |
---|
| 438 | |
---|
| 439 | ishape = SHAPE( cwork ) |
---|
| 440 | CALL FFTN( cwork, ishape, inv = .TRUE. ) |
---|
| 441 | |
---|
| 442 | DO i = 0, nx |
---|
| 443 | ar(i,j,k) = REAL( cwork(i) ) |
---|
| 444 | ENDDO |
---|
| 445 | |
---|
| 446 | ENDDO |
---|
| 447 | ENDDO |
---|
| 448 | !$OMP END PARALLEL |
---|
| 449 | |
---|
| 450 | ENDIF |
---|
| 451 | |
---|
| 452 | DEALLOCATE( cwork ) |
---|
| 453 | |
---|
| 454 | ELSEIF ( fft_method == 'temperton-algorithm' ) THEN |
---|
| 455 | |
---|
| 456 | ! |
---|
| 457 | !-- Performing the fft with Temperton's software works on every system, |
---|
| 458 | !-- since it is part of the model |
---|
| 459 | IF ( forward_fft ) THEN |
---|
| 460 | |
---|
[1304] | 461 | !$OMP PARALLEL PRIVATE ( work, work1, i, j, k ) |
---|
[1106] | 462 | !$OMP DO |
---|
| 463 | DO k = nzb_x, nzt_x |
---|
| 464 | DO j = nys_x, nyn_x |
---|
| 465 | |
---|
| 466 | work(0:nx) = ar(0:nx,j,k) |
---|
| 467 | CALL fft991cy( work, work1, trigs_x, ifax_x, 1, nx+1, nx+1, 1, -1 ) |
---|
| 468 | |
---|
| 469 | DO i = 0, (nx+1)/2 |
---|
| 470 | ar(i,j,k) = work(2*i) |
---|
| 471 | ENDDO |
---|
| 472 | DO i = 1, (nx+1)/2 - 1 |
---|
| 473 | ar(nx+1-i,j,k) = work(2*i+1) |
---|
| 474 | ENDDO |
---|
| 475 | |
---|
| 476 | ENDDO |
---|
| 477 | ENDDO |
---|
| 478 | !$OMP END PARALLEL |
---|
| 479 | |
---|
| 480 | ELSE |
---|
| 481 | |
---|
[1304] | 482 | !$OMP PARALLEL PRIVATE ( work, work1, i, j, k ) |
---|
[1106] | 483 | !$OMP DO |
---|
| 484 | DO k = nzb_x, nzt_x |
---|
| 485 | DO j = nys_x, nyn_x |
---|
| 486 | |
---|
| 487 | DO i = 0, (nx+1)/2 |
---|
| 488 | work(2*i) = ar(i,j,k) |
---|
| 489 | ENDDO |
---|
| 490 | DO i = 1, (nx+1)/2 - 1 |
---|
| 491 | work(2*i+1) = ar(nx+1-i,j,k) |
---|
| 492 | ENDDO |
---|
| 493 | work(1) = 0.0 |
---|
| 494 | work(nx+2) = 0.0 |
---|
| 495 | |
---|
| 496 | CALL fft991cy( work, work1, trigs_x, ifax_x, 1, nx+1, nx+1, 1, 1 ) |
---|
| 497 | ar(0:nx,j,k) = work(0:nx) |
---|
| 498 | |
---|
| 499 | ENDDO |
---|
| 500 | ENDDO |
---|
| 501 | !$OMP END PARALLEL |
---|
| 502 | |
---|
| 503 | ENDIF |
---|
| 504 | |
---|
[1210] | 505 | ELSEIF ( fft_method == 'fftw' ) THEN |
---|
| 506 | |
---|
| 507 | #if defined( __fftw ) |
---|
| 508 | IF ( forward_fft ) THEN |
---|
| 509 | |
---|
| 510 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 511 | !$OMP DO |
---|
| 512 | DO k = nzb_x, nzt_x |
---|
| 513 | DO j = nys_x, nyn_x |
---|
| 514 | |
---|
| 515 | x_in(0:nx) = ar(0:nx,j,k) |
---|
| 516 | CALL FFTW_EXECUTE_DFT_R2C( plan_xf, x_in, x_out ) |
---|
| 517 | |
---|
[1216] | 518 | IF ( PRESENT( ar_2d ) ) THEN |
---|
[1210] | 519 | |
---|
[1216] | 520 | DO i = 0, (nx+1)/2 |
---|
| 521 | ar_2d(i,j) = REAL( x_out(i) ) / ( nx+1 ) |
---|
| 522 | ENDDO |
---|
| 523 | DO i = 1, (nx+1)/2 - 1 |
---|
| 524 | ar_2d(nx+1-i,j) = AIMAG( x_out(i) ) / ( nx+1 ) |
---|
| 525 | ENDDO |
---|
| 526 | |
---|
| 527 | ELSE |
---|
| 528 | |
---|
| 529 | DO i = 0, (nx+1)/2 |
---|
| 530 | ar(i,j,k) = REAL( x_out(i) ) / ( nx+1 ) |
---|
| 531 | ENDDO |
---|
| 532 | DO i = 1, (nx+1)/2 - 1 |
---|
| 533 | ar(nx+1-i,j,k) = AIMAG( x_out(i) ) / ( nx+1 ) |
---|
| 534 | ENDDO |
---|
| 535 | |
---|
| 536 | ENDIF |
---|
| 537 | |
---|
[1210] | 538 | ENDDO |
---|
| 539 | ENDDO |
---|
| 540 | !$OMP END PARALLEL |
---|
| 541 | |
---|
[1216] | 542 | ELSE |
---|
[1210] | 543 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 544 | !$OMP DO |
---|
| 545 | DO k = nzb_x, nzt_x |
---|
| 546 | DO j = nys_x, nyn_x |
---|
| 547 | |
---|
[1216] | 548 | IF ( PRESENT( ar_2d ) ) THEN |
---|
[1210] | 549 | |
---|
[1216] | 550 | x_out(0) = CMPLX( ar_2d(0,j), 0.0 ) |
---|
| 551 | DO i = 1, (nx+1)/2 - 1 |
---|
| 552 | x_out(i) = CMPLX( ar_2d(i,j), ar_2d(nx+1-i,j) ) |
---|
| 553 | ENDDO |
---|
| 554 | x_out((nx+1)/2) = CMPLX( ar_2d((nx+1)/2,j), 0.0 ) |
---|
| 555 | |
---|
| 556 | ELSE |
---|
| 557 | |
---|
| 558 | x_out(0) = CMPLX( ar(0,j,k), 0.0 ) |
---|
| 559 | DO i = 1, (nx+1)/2 - 1 |
---|
| 560 | x_out(i) = CMPLX( ar(i,j,k), ar(nx+1-i,j,k) ) |
---|
| 561 | ENDDO |
---|
| 562 | x_out((nx+1)/2) = CMPLX( ar((nx+1)/2,j,k), 0.0 ) |
---|
| 563 | |
---|
| 564 | ENDIF |
---|
| 565 | |
---|
[1210] | 566 | CALL FFTW_EXECUTE_DFT_C2R( plan_xi, x_out, x_in) |
---|
| 567 | ar(0:nx,j,k) = x_in(0:nx) |
---|
| 568 | |
---|
| 569 | ENDDO |
---|
| 570 | ENDDO |
---|
| 571 | !$OMP END PARALLEL |
---|
| 572 | |
---|
[1216] | 573 | ENDIF |
---|
[1210] | 574 | #endif |
---|
| 575 | |
---|
[1106] | 576 | ELSEIF ( fft_method == 'system-specific' ) THEN |
---|
| 577 | |
---|
| 578 | #if defined( __ibm ) && ! defined( __ibmy_special ) |
---|
| 579 | IF ( forward_fft ) THEN |
---|
| 580 | |
---|
| 581 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 582 | !$OMP DO |
---|
| 583 | DO k = nzb_x, nzt_x |
---|
| 584 | DO j = nys_x, nyn_x |
---|
| 585 | |
---|
[1320] | 586 | CALL DRCFT( 0, ar, 1, work, 1, nx+1, 1, 1, sqr_dnx, aux1, & |
---|
| 587 | nau1, aux2, nau2 ) |
---|
[1106] | 588 | |
---|
| 589 | DO i = 0, (nx+1)/2 |
---|
| 590 | ar(i,j,k) = work(2*i) |
---|
| 591 | ENDDO |
---|
| 592 | DO i = 1, (nx+1)/2 - 1 |
---|
| 593 | ar(nx+1-i,j,k) = work(2*i+1) |
---|
| 594 | ENDDO |
---|
| 595 | |
---|
| 596 | ENDDO |
---|
| 597 | ENDDO |
---|
| 598 | !$OMP END PARALLEL |
---|
| 599 | |
---|
| 600 | ELSE |
---|
| 601 | |
---|
| 602 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 603 | !$OMP DO |
---|
| 604 | DO k = nzb_x, nzt_x |
---|
| 605 | DO j = nys_x, nyn_x |
---|
| 606 | |
---|
| 607 | DO i = 0, (nx+1)/2 |
---|
| 608 | work(2*i) = ar(i,j,k) |
---|
| 609 | ENDDO |
---|
| 610 | DO i = 1, (nx+1)/2 - 1 |
---|
| 611 | work(2*i+1) = ar(nx+1-i,j,k) |
---|
| 612 | ENDDO |
---|
| 613 | work(1) = 0.0 |
---|
| 614 | work(nx+2) = 0.0 |
---|
| 615 | |
---|
[1320] | 616 | CALL DCRFT( 0, work, 1, work, 1, nx+1, 1, -1, sqr_dnx, & |
---|
| 617 | aux3, nau1, aux4, nau2 ) |
---|
[1106] | 618 | |
---|
| 619 | DO i = 0, nx |
---|
| 620 | ar(i,j,k) = work(i) |
---|
| 621 | ENDDO |
---|
| 622 | |
---|
| 623 | ENDDO |
---|
| 624 | ENDDO |
---|
| 625 | !$OMP END PARALLEL |
---|
| 626 | |
---|
| 627 | ENDIF |
---|
| 628 | |
---|
| 629 | #elif defined( __nec ) |
---|
| 630 | |
---|
| 631 | IF ( forward_fft ) THEN |
---|
| 632 | |
---|
| 633 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 634 | !$OMP DO |
---|
| 635 | DO k = nzb_x, nzt_x |
---|
| 636 | DO j = nys_x, nyn_x |
---|
| 637 | |
---|
| 638 | work(0:nx) = ar(0:nx,j,k) |
---|
| 639 | |
---|
| 640 | CALL DZFFT( 1, nx+1, sqr_dnx, work, work, trig_xf, work2, 0 ) |
---|
| 641 | |
---|
| 642 | DO i = 0, (nx+1)/2 |
---|
| 643 | ar(i,j,k) = work(2*i) |
---|
| 644 | ENDDO |
---|
| 645 | DO i = 1, (nx+1)/2 - 1 |
---|
| 646 | ar(nx+1-i,j,k) = work(2*i+1) |
---|
| 647 | ENDDO |
---|
| 648 | |
---|
| 649 | ENDDO |
---|
| 650 | ENDDO |
---|
| 651 | !$END OMP PARALLEL |
---|
| 652 | |
---|
| 653 | ELSE |
---|
| 654 | |
---|
| 655 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 656 | !$OMP DO |
---|
| 657 | DO k = nzb_x, nzt_x |
---|
| 658 | DO j = nys_x, nyn_x |
---|
| 659 | |
---|
| 660 | DO i = 0, (nx+1)/2 |
---|
| 661 | work(2*i) = ar(i,j,k) |
---|
| 662 | ENDDO |
---|
| 663 | DO i = 1, (nx+1)/2 - 1 |
---|
| 664 | work(2*i+1) = ar(nx+1-i,j,k) |
---|
| 665 | ENDDO |
---|
| 666 | work(1) = 0.0 |
---|
| 667 | work(nx+2) = 0.0 |
---|
| 668 | |
---|
| 669 | CALL ZDFFT( -1, nx+1, sqr_dnx, work, work, trig_xb, work2, 0 ) |
---|
| 670 | |
---|
| 671 | ar(0:nx,j,k) = work(0:nx) |
---|
| 672 | |
---|
| 673 | ENDDO |
---|
| 674 | ENDDO |
---|
| 675 | !$OMP END PARALLEL |
---|
| 676 | |
---|
| 677 | ENDIF |
---|
| 678 | |
---|
| 679 | #elif defined( __cuda_fft ) |
---|
| 680 | |
---|
| 681 | IF ( forward_fft ) THEN |
---|
| 682 | |
---|
[1111] | 683 | !$acc data present( ar ) |
---|
| 684 | CALL CUFFTEXECD2Z( plan_xf, ar, ar_tmp ) |
---|
[1106] | 685 | |
---|
[1111] | 686 | !$acc kernels |
---|
[1106] | 687 | DO k = nzb_x, nzt_x |
---|
| 688 | DO j = nys_x, nyn_x |
---|
| 689 | |
---|
| 690 | DO i = 0, (nx+1)/2 |
---|
[1111] | 691 | ar(i,j,k) = REAL( ar_tmp(i,j,k) ) * dnx |
---|
[1106] | 692 | ENDDO |
---|
| 693 | |
---|
| 694 | DO i = 1, (nx+1)/2 - 1 |
---|
[1111] | 695 | ar(nx+1-i,j,k) = AIMAG( ar_tmp(i,j,k) ) * dnx |
---|
[1106] | 696 | ENDDO |
---|
| 697 | |
---|
| 698 | ENDDO |
---|
| 699 | ENDDO |
---|
[1111] | 700 | !$acc end kernels |
---|
| 701 | !$acc end data |
---|
[1106] | 702 | |
---|
| 703 | ELSE |
---|
| 704 | |
---|
[1111] | 705 | !$acc data present( ar ) |
---|
| 706 | !$acc kernels |
---|
[1106] | 707 | DO k = nzb_x, nzt_x |
---|
| 708 | DO j = nys_x, nyn_x |
---|
| 709 | |
---|
[1111] | 710 | ar_tmp(0,j,k) = CMPLX( ar(0,j,k), 0.0 ) |
---|
[1106] | 711 | |
---|
| 712 | DO i = 1, (nx+1)/2 - 1 |
---|
[1111] | 713 | ar_tmp(i,j,k) = CMPLX( ar(i,j,k), ar(nx+1-i,j,k) ) |
---|
[1106] | 714 | ENDDO |
---|
[1111] | 715 | ar_tmp((nx+1)/2,j,k) = CMPLX( ar((nx+1)/2,j,k), 0.0 ) |
---|
[1106] | 716 | |
---|
| 717 | ENDDO |
---|
| 718 | ENDDO |
---|
[1111] | 719 | !$acc end kernels |
---|
[1106] | 720 | |
---|
[1111] | 721 | CALL CUFFTEXECZ2D( plan_xi, ar_tmp, ar ) |
---|
| 722 | !$acc end data |
---|
[1106] | 723 | |
---|
| 724 | ENDIF |
---|
| 725 | |
---|
| 726 | #else |
---|
| 727 | message_string = 'no system-specific fft-call available' |
---|
| 728 | CALL message( 'fft_x', 'PA0188', 1, 2, 0, 6, 0 ) |
---|
| 729 | #endif |
---|
| 730 | |
---|
| 731 | ELSE |
---|
| 732 | |
---|
| 733 | message_string = 'fft method "' // TRIM( fft_method) // & |
---|
| 734 | '" not available' |
---|
| 735 | CALL message( 'fft_x', 'PA0189', 1, 2, 0, 6, 0 ) |
---|
| 736 | |
---|
| 737 | ENDIF |
---|
| 738 | |
---|
| 739 | END SUBROUTINE fft_x |
---|
| 740 | |
---|
| 741 | SUBROUTINE fft_x_1d( ar, direction ) |
---|
| 742 | |
---|
| 743 | !----------------------------------------------------------------------! |
---|
| 744 | ! fft_x_1d ! |
---|
| 745 | ! ! |
---|
| 746 | ! Fourier-transformation along x-direction ! |
---|
| 747 | ! Version for 1D-decomposition ! |
---|
| 748 | ! ! |
---|
| 749 | ! fft_x uses internal algorithms (Singleton or Temperton) or ! |
---|
| 750 | ! system-specific routines, if they are available ! |
---|
| 751 | !----------------------------------------------------------------------! |
---|
| 752 | |
---|
| 753 | IMPLICIT NONE |
---|
| 754 | |
---|
[1320] | 755 | CHARACTER (LEN=*) :: direction !: |
---|
| 756 | |
---|
| 757 | INTEGER(iwp) :: i !: |
---|
| 758 | INTEGER(iwp) :: ishape(1) !: |
---|
[1] | 759 | |
---|
[1320] | 760 | LOGICAL :: forward_fft !: |
---|
[1106] | 761 | |
---|
[1320] | 762 | REAL(wp), DIMENSION(0:nx) :: ar !: |
---|
| 763 | REAL(wp), DIMENSION(0:nx+2) :: work !: |
---|
| 764 | REAL(wp), DIMENSION(nx+2) :: work1 !: |
---|
| 765 | |
---|
| 766 | COMPLEX(wp), DIMENSION(:), ALLOCATABLE :: cwork !: |
---|
| 767 | |
---|
[1] | 768 | #if defined( __ibm ) |
---|
[1320] | 769 | REAL(wp), DIMENSION(nau2) :: aux2 !: |
---|
| 770 | REAL(wp), DIMENSION(nau2) :: aux4 !: |
---|
[1] | 771 | #elif defined( __nec ) |
---|
[1320] | 772 | REAL(wp), DIMENSION(6*(nx+1)) :: work2 !: |
---|
[1] | 773 | #endif |
---|
| 774 | |
---|
[1106] | 775 | IF ( direction == 'forward' ) THEN |
---|
| 776 | forward_fft = .TRUE. |
---|
| 777 | ELSE |
---|
| 778 | forward_fft = .FALSE. |
---|
| 779 | ENDIF |
---|
| 780 | |
---|
[1] | 781 | IF ( fft_method == 'singleton-algorithm' ) THEN |
---|
| 782 | |
---|
| 783 | ! |
---|
| 784 | !-- Performing the fft with singleton's software works on every system, |
---|
| 785 | !-- since it is part of the model |
---|
| 786 | ALLOCATE( cwork(0:nx) ) |
---|
| 787 | |
---|
[1106] | 788 | IF ( forward_fft ) then |
---|
[1] | 789 | |
---|
| 790 | DO i = 0, nx |
---|
| 791 | cwork(i) = CMPLX( ar(i) ) |
---|
| 792 | ENDDO |
---|
| 793 | ishape = SHAPE( cwork ) |
---|
| 794 | CALL FFTN( cwork, ishape ) |
---|
| 795 | DO i = 0, (nx+1)/2 |
---|
| 796 | ar(i) = REAL( cwork(i) ) |
---|
| 797 | ENDDO |
---|
| 798 | DO i = 1, (nx+1)/2 - 1 |
---|
| 799 | ar(nx+1-i) = -AIMAG( cwork(i) ) |
---|
| 800 | ENDDO |
---|
| 801 | |
---|
| 802 | ELSE |
---|
| 803 | |
---|
| 804 | cwork(0) = CMPLX( ar(0), 0.0 ) |
---|
| 805 | DO i = 1, (nx+1)/2 - 1 |
---|
| 806 | cwork(i) = CMPLX( ar(i), -ar(nx+1-i) ) |
---|
| 807 | cwork(nx+1-i) = CMPLX( ar(i), ar(nx+1-i) ) |
---|
| 808 | ENDDO |
---|
| 809 | cwork((nx+1)/2) = CMPLX( ar((nx+1)/2), 0.0 ) |
---|
| 810 | |
---|
| 811 | ishape = SHAPE( cwork ) |
---|
| 812 | CALL FFTN( cwork, ishape, inv = .TRUE. ) |
---|
| 813 | |
---|
| 814 | DO i = 0, nx |
---|
| 815 | ar(i) = REAL( cwork(i) ) |
---|
| 816 | ENDDO |
---|
| 817 | |
---|
| 818 | ENDIF |
---|
| 819 | |
---|
| 820 | DEALLOCATE( cwork ) |
---|
| 821 | |
---|
| 822 | ELSEIF ( fft_method == 'temperton-algorithm' ) THEN |
---|
| 823 | |
---|
| 824 | ! |
---|
| 825 | !-- Performing the fft with Temperton's software works on every system, |
---|
| 826 | !-- since it is part of the model |
---|
[1106] | 827 | IF ( forward_fft ) THEN |
---|
[1] | 828 | |
---|
| 829 | work(0:nx) = ar |
---|
| 830 | CALL fft991cy( work, work1, trigs_x, ifax_x, 1, nx+1, nx+1, 1, -1 ) |
---|
| 831 | |
---|
| 832 | DO i = 0, (nx+1)/2 |
---|
| 833 | ar(i) = work(2*i) |
---|
| 834 | ENDDO |
---|
| 835 | DO i = 1, (nx+1)/2 - 1 |
---|
| 836 | ar(nx+1-i) = work(2*i+1) |
---|
| 837 | ENDDO |
---|
| 838 | |
---|
| 839 | ELSE |
---|
| 840 | |
---|
| 841 | DO i = 0, (nx+1)/2 |
---|
| 842 | work(2*i) = ar(i) |
---|
| 843 | ENDDO |
---|
| 844 | DO i = 1, (nx+1)/2 - 1 |
---|
| 845 | work(2*i+1) = ar(nx+1-i) |
---|
| 846 | ENDDO |
---|
| 847 | work(1) = 0.0 |
---|
| 848 | work(nx+2) = 0.0 |
---|
| 849 | |
---|
| 850 | CALL fft991cy( work, work1, trigs_x, ifax_x, 1, nx+1, nx+1, 1, 1 ) |
---|
| 851 | ar = work(0:nx) |
---|
| 852 | |
---|
| 853 | ENDIF |
---|
| 854 | |
---|
[1216] | 855 | ELSEIF ( fft_method == 'fftw' ) THEN |
---|
| 856 | |
---|
| 857 | #if defined( __fftw ) |
---|
| 858 | IF ( forward_fft ) THEN |
---|
| 859 | |
---|
| 860 | x_in(0:nx) = ar(0:nx) |
---|
| 861 | CALL FFTW_EXECUTE_DFT_R2C( plan_xf, x_in, x_out ) |
---|
| 862 | |
---|
| 863 | DO i = 0, (nx+1)/2 |
---|
| 864 | ar(i) = REAL( x_out(i) ) / ( nx+1 ) |
---|
| 865 | ENDDO |
---|
| 866 | DO i = 1, (nx+1)/2 - 1 |
---|
| 867 | ar(nx+1-i) = AIMAG( x_out(i) ) / ( nx+1 ) |
---|
| 868 | ENDDO |
---|
| 869 | |
---|
| 870 | ELSE |
---|
| 871 | |
---|
| 872 | x_out(0) = CMPLX( ar(0), 0.0 ) |
---|
| 873 | DO i = 1, (nx+1)/2 - 1 |
---|
| 874 | x_out(i) = CMPLX( ar(i), ar(nx+1-i) ) |
---|
| 875 | ENDDO |
---|
| 876 | x_out((nx+1)/2) = CMPLX( ar((nx+1)/2), 0.0 ) |
---|
| 877 | |
---|
| 878 | CALL FFTW_EXECUTE_DFT_C2R( plan_xi, x_out, x_in) |
---|
| 879 | ar(0:nx) = x_in(0:nx) |
---|
| 880 | |
---|
| 881 | ENDIF |
---|
| 882 | #endif |
---|
| 883 | |
---|
[1] | 884 | ELSEIF ( fft_method == 'system-specific' ) THEN |
---|
| 885 | |
---|
| 886 | #if defined( __ibm ) && ! defined( __ibmy_special ) |
---|
[1106] | 887 | IF ( forward_fft ) THEN |
---|
[1] | 888 | |
---|
[1320] | 889 | CALL DRCFT( 0, ar, 1, work, 1, nx+1, 1, 1, sqr_dnx, aux1, nau1, & |
---|
[1] | 890 | aux2, nau2 ) |
---|
| 891 | |
---|
| 892 | DO i = 0, (nx+1)/2 |
---|
| 893 | ar(i) = work(2*i) |
---|
| 894 | ENDDO |
---|
| 895 | DO i = 1, (nx+1)/2 - 1 |
---|
| 896 | ar(nx+1-i) = work(2*i+1) |
---|
| 897 | ENDDO |
---|
| 898 | |
---|
| 899 | ELSE |
---|
| 900 | |
---|
| 901 | DO i = 0, (nx+1)/2 |
---|
| 902 | work(2*i) = ar(i) |
---|
| 903 | ENDDO |
---|
| 904 | DO i = 1, (nx+1)/2 - 1 |
---|
| 905 | work(2*i+1) = ar(nx+1-i) |
---|
| 906 | ENDDO |
---|
| 907 | work(1) = 0.0 |
---|
| 908 | work(nx+2) = 0.0 |
---|
| 909 | |
---|
[1106] | 910 | CALL DCRFT( 0, work, 1, work, 1, nx+1, 1, -1, sqr_dnx, aux3, nau1, & |
---|
[1] | 911 | aux4, nau2 ) |
---|
| 912 | |
---|
| 913 | DO i = 0, nx |
---|
| 914 | ar(i) = work(i) |
---|
| 915 | ENDDO |
---|
| 916 | |
---|
| 917 | ENDIF |
---|
| 918 | #elif defined( __nec ) |
---|
[1106] | 919 | IF ( forward_fft ) THEN |
---|
[1] | 920 | |
---|
| 921 | work(0:nx) = ar(0:nx) |
---|
| 922 | |
---|
[1106] | 923 | CALL DZFFT( 1, nx+1, sqr_dnx, work, work, trig_xf, work2, 0 ) |
---|
| 924 | |
---|
[1] | 925 | DO i = 0, (nx+1)/2 |
---|
| 926 | ar(i) = work(2*i) |
---|
| 927 | ENDDO |
---|
| 928 | DO i = 1, (nx+1)/2 - 1 |
---|
| 929 | ar(nx+1-i) = work(2*i+1) |
---|
| 930 | ENDDO |
---|
| 931 | |
---|
| 932 | ELSE |
---|
| 933 | |
---|
| 934 | DO i = 0, (nx+1)/2 |
---|
| 935 | work(2*i) = ar(i) |
---|
| 936 | ENDDO |
---|
| 937 | DO i = 1, (nx+1)/2 - 1 |
---|
| 938 | work(2*i+1) = ar(nx+1-i) |
---|
| 939 | ENDDO |
---|
| 940 | work(1) = 0.0 |
---|
| 941 | work(nx+2) = 0.0 |
---|
| 942 | |
---|
[1106] | 943 | CALL ZDFFT( -1, nx+1, sqr_dnx, work, work, trig_xb, work2, 0 ) |
---|
[1] | 944 | |
---|
| 945 | ar(0:nx) = work(0:nx) |
---|
| 946 | |
---|
| 947 | ENDIF |
---|
| 948 | #else |
---|
[254] | 949 | message_string = 'no system-specific fft-call available' |
---|
[1106] | 950 | CALL message( 'fft_x_1d', 'PA0188', 1, 2, 0, 6, 0 ) |
---|
[1] | 951 | #endif |
---|
| 952 | ELSE |
---|
[274] | 953 | message_string = 'fft method "' // TRIM( fft_method) // & |
---|
| 954 | '" not available' |
---|
[1106] | 955 | CALL message( 'fft_x_1d', 'PA0189', 1, 2, 0, 6, 0 ) |
---|
[1] | 956 | |
---|
| 957 | ENDIF |
---|
| 958 | |
---|
[1106] | 959 | END SUBROUTINE fft_x_1d |
---|
[1] | 960 | |
---|
[1216] | 961 | SUBROUTINE fft_y( ar, direction, ar_tr, nxl_y_bound, nxr_y_bound, nxl_y_l, & |
---|
| 962 | nxr_y_l ) |
---|
[1] | 963 | |
---|
| 964 | !----------------------------------------------------------------------! |
---|
| 965 | ! fft_y ! |
---|
| 966 | ! ! |
---|
| 967 | ! Fourier-transformation along y-direction ! |
---|
[1106] | 968 | ! Version for 2D-decomposition ! |
---|
[1] | 969 | ! ! |
---|
| 970 | ! fft_y uses internal algorithms (Singleton or Temperton) or ! |
---|
| 971 | ! system-specific routines, if they are available ! |
---|
[1216] | 972 | ! ! |
---|
| 973 | ! direction: 'forward' or 'backward' ! |
---|
| 974 | ! ar, ar_tr: 3D data arrays ! |
---|
| 975 | ! forward: ar: before ar_tr: after transformation ! |
---|
| 976 | ! backward: ar_tr: before ar: after transfosition ! |
---|
| 977 | ! ! |
---|
| 978 | ! In case of non-overlapping transposition/transformation: ! |
---|
| 979 | ! nxl_y_bound = nxl_y_l = nxl_y ! |
---|
| 980 | ! nxr_y_bound = nxr_y_l = nxr_y ! |
---|
| 981 | ! ! |
---|
| 982 | ! In case of overlapping transposition/transformation ! |
---|
| 983 | ! - nxl_y_bound and nxr_y_bound have the original values of ! |
---|
| 984 | ! nxl_y, nxr_y. ar_tr is dimensioned using these values. ! |
---|
| 985 | ! - nxl_y_l = nxr_y_r. ar is dimensioned with these values, so that ! |
---|
| 986 | ! transformation is carried out for a 2D-plane only. ! |
---|
[1] | 987 | !----------------------------------------------------------------------! |
---|
| 988 | |
---|
[1106] | 989 | USE cuda_fft_interfaces |
---|
[1153] | 990 | #if defined( __cuda_fft ) |
---|
| 991 | USE ISO_C_BINDING |
---|
| 992 | #endif |
---|
[1106] | 993 | |
---|
[1] | 994 | IMPLICIT NONE |
---|
| 995 | |
---|
[1320] | 996 | CHARACTER (LEN=*) :: direction !: |
---|
| 997 | |
---|
| 998 | INTEGER(iwp) :: i !: |
---|
| 999 | INTEGER(iwp) :: j !: |
---|
| 1000 | INTEGER(iwp) :: jshape(1) !: |
---|
| 1001 | INTEGER(iwp) :: k !: |
---|
| 1002 | INTEGER(iwp) :: nxl_y_bound !: |
---|
| 1003 | INTEGER(iwp) :: nxl_y_l !: |
---|
| 1004 | INTEGER(iwp) :: nxr_y_bound !: |
---|
| 1005 | INTEGER(iwp) :: nxr_y_l !: |
---|
[1106] | 1006 | |
---|
[1320] | 1007 | LOGICAL :: forward_fft !: |
---|
[1106] | 1008 | |
---|
[1320] | 1009 | REAL(wp), DIMENSION(0:ny+2) :: work !: |
---|
| 1010 | REAL(wp), DIMENSION(ny+2) :: work1 !: |
---|
| 1011 | |
---|
| 1012 | COMPLEX(wp), DIMENSION(:), ALLOCATABLE :: cwork !: |
---|
| 1013 | |
---|
[1106] | 1014 | #if defined( __ibm ) |
---|
[1320] | 1015 | REAL(wp), DIMENSION(nau2) :: auy2 !: |
---|
| 1016 | REAL(wp), DIMENSION(nau2) :: auy4 !: |
---|
[1106] | 1017 | #elif defined( __nec ) |
---|
[1320] | 1018 | REAL(wp), DIMENSION(6*(ny+1)) :: work2 !: |
---|
[1106] | 1019 | #elif defined( __cuda_fft ) |
---|
[1320] | 1020 | COMPLEX(dpk), DIMENSION(0:(ny+1)/2,nxl_y:nxr_y,nzb_y:nzt_y) :: & |
---|
| 1021 | ar_tmp !: |
---|
[1111] | 1022 | !$acc declare create( ar_tmp ) |
---|
[1106] | 1023 | #endif |
---|
| 1024 | |
---|
[1320] | 1025 | REAL(wp), DIMENSION(0:ny,nxl_y_l:nxr_y_l,nzb_y:nzt_y) :: & |
---|
| 1026 | ar !: |
---|
| 1027 | REAL(wp), DIMENSION(0:ny,nxl_y_bound:nxr_y_bound,nzb_y:nzt_y) :: & |
---|
| 1028 | ar_tr !: |
---|
| 1029 | |
---|
[1106] | 1030 | IF ( direction == 'forward' ) THEN |
---|
| 1031 | forward_fft = .TRUE. |
---|
| 1032 | ELSE |
---|
| 1033 | forward_fft = .FALSE. |
---|
| 1034 | ENDIF |
---|
| 1035 | |
---|
| 1036 | IF ( fft_method == 'singleton-algorithm' ) THEN |
---|
| 1037 | |
---|
| 1038 | ! |
---|
| 1039 | !-- Performing the fft with singleton's software works on every system, |
---|
| 1040 | !-- since it is part of the model |
---|
| 1041 | ALLOCATE( cwork(0:ny) ) |
---|
| 1042 | |
---|
| 1043 | IF ( forward_fft ) then |
---|
| 1044 | |
---|
| 1045 | !$OMP PARALLEL PRIVATE ( cwork, i, jshape, j, k ) |
---|
| 1046 | !$OMP DO |
---|
| 1047 | DO k = nzb_y, nzt_y |
---|
[1216] | 1048 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1049 | |
---|
| 1050 | DO j = 0, ny |
---|
| 1051 | cwork(j) = CMPLX( ar(j,i,k) ) |
---|
| 1052 | ENDDO |
---|
| 1053 | |
---|
| 1054 | jshape = SHAPE( cwork ) |
---|
| 1055 | CALL FFTN( cwork, jshape ) |
---|
| 1056 | |
---|
| 1057 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1058 | ar_tr(j,i,k) = REAL( cwork(j) ) |
---|
[1106] | 1059 | ENDDO |
---|
| 1060 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1061 | ar_tr(ny+1-j,i,k) = -AIMAG( cwork(j) ) |
---|
[1106] | 1062 | ENDDO |
---|
| 1063 | |
---|
| 1064 | ENDDO |
---|
| 1065 | ENDDO |
---|
| 1066 | !$OMP END PARALLEL |
---|
| 1067 | |
---|
| 1068 | ELSE |
---|
| 1069 | |
---|
| 1070 | !$OMP PARALLEL PRIVATE ( cwork, i, jshape, j, k ) |
---|
| 1071 | !$OMP DO |
---|
| 1072 | DO k = nzb_y, nzt_y |
---|
[1216] | 1073 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1074 | |
---|
[1216] | 1075 | cwork(0) = CMPLX( ar_tr(0,i,k), 0.0 ) |
---|
[1106] | 1076 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1077 | cwork(j) = CMPLX( ar_tr(j,i,k), -ar_tr(ny+1-j,i,k) ) |
---|
| 1078 | cwork(ny+1-j) = CMPLX( ar_tr(j,i,k), ar_tr(ny+1-j,i,k) ) |
---|
[1106] | 1079 | ENDDO |
---|
[1216] | 1080 | cwork((ny+1)/2) = CMPLX( ar_tr((ny+1)/2,i,k), 0.0 ) |
---|
[1106] | 1081 | |
---|
| 1082 | jshape = SHAPE( cwork ) |
---|
| 1083 | CALL FFTN( cwork, jshape, inv = .TRUE. ) |
---|
| 1084 | |
---|
| 1085 | DO j = 0, ny |
---|
| 1086 | ar(j,i,k) = REAL( cwork(j) ) |
---|
| 1087 | ENDDO |
---|
| 1088 | |
---|
| 1089 | ENDDO |
---|
| 1090 | ENDDO |
---|
| 1091 | !$OMP END PARALLEL |
---|
| 1092 | |
---|
| 1093 | ENDIF |
---|
| 1094 | |
---|
| 1095 | DEALLOCATE( cwork ) |
---|
| 1096 | |
---|
| 1097 | ELSEIF ( fft_method == 'temperton-algorithm' ) THEN |
---|
| 1098 | |
---|
| 1099 | ! |
---|
| 1100 | !-- Performing the fft with Temperton's software works on every system, |
---|
| 1101 | !-- since it is part of the model |
---|
| 1102 | IF ( forward_fft ) THEN |
---|
| 1103 | |
---|
[1304] | 1104 | !$OMP PARALLEL PRIVATE ( work, work1, i, j, k ) |
---|
[1106] | 1105 | !$OMP DO |
---|
| 1106 | DO k = nzb_y, nzt_y |
---|
[1216] | 1107 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1108 | |
---|
| 1109 | work(0:ny) = ar(0:ny,i,k) |
---|
| 1110 | CALL fft991cy( work, work1, trigs_y, ifax_y, 1, ny+1, ny+1, 1, -1 ) |
---|
| 1111 | |
---|
| 1112 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1113 | ar_tr(j,i,k) = work(2*j) |
---|
[1106] | 1114 | ENDDO |
---|
| 1115 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1116 | ar_tr(ny+1-j,i,k) = work(2*j+1) |
---|
[1106] | 1117 | ENDDO |
---|
| 1118 | |
---|
| 1119 | ENDDO |
---|
| 1120 | ENDDO |
---|
| 1121 | !$OMP END PARALLEL |
---|
| 1122 | |
---|
| 1123 | ELSE |
---|
| 1124 | |
---|
[1304] | 1125 | !$OMP PARALLEL PRIVATE ( work, work1, i, j, k ) |
---|
[1106] | 1126 | !$OMP DO |
---|
| 1127 | DO k = nzb_y, nzt_y |
---|
[1216] | 1128 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1129 | |
---|
| 1130 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1131 | work(2*j) = ar_tr(j,i,k) |
---|
[1106] | 1132 | ENDDO |
---|
| 1133 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1134 | work(2*j+1) = ar_tr(ny+1-j,i,k) |
---|
[1106] | 1135 | ENDDO |
---|
| 1136 | work(1) = 0.0 |
---|
| 1137 | work(ny+2) = 0.0 |
---|
| 1138 | |
---|
| 1139 | CALL fft991cy( work, work1, trigs_y, ifax_y, 1, ny+1, ny+1, 1, 1 ) |
---|
| 1140 | ar(0:ny,i,k) = work(0:ny) |
---|
| 1141 | |
---|
| 1142 | ENDDO |
---|
| 1143 | ENDDO |
---|
| 1144 | !$OMP END PARALLEL |
---|
| 1145 | |
---|
| 1146 | ENDIF |
---|
| 1147 | |
---|
[1210] | 1148 | ELSEIF ( fft_method == 'fftw' ) THEN |
---|
| 1149 | |
---|
| 1150 | #if defined( __fftw ) |
---|
| 1151 | IF ( forward_fft ) THEN |
---|
| 1152 | |
---|
| 1153 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 1154 | !$OMP DO |
---|
| 1155 | DO k = nzb_y, nzt_y |
---|
[1216] | 1156 | DO i = nxl_y_l, nxr_y_l |
---|
[1210] | 1157 | |
---|
| 1158 | y_in(0:ny) = ar(0:ny,i,k) |
---|
| 1159 | CALL FFTW_EXECUTE_DFT_R2C( plan_yf, y_in, y_out ) |
---|
| 1160 | |
---|
| 1161 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1162 | ar_tr(j,i,k) = REAL( y_out(j) ) / (ny+1) |
---|
[1210] | 1163 | ENDDO |
---|
| 1164 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1165 | ar_tr(ny+1-j,i,k) = AIMAG( y_out(j) ) / (ny+1) |
---|
[1210] | 1166 | ENDDO |
---|
| 1167 | |
---|
| 1168 | ENDDO |
---|
| 1169 | ENDDO |
---|
| 1170 | !$OMP END PARALLEL |
---|
| 1171 | |
---|
| 1172 | ELSE |
---|
| 1173 | |
---|
| 1174 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 1175 | !$OMP DO |
---|
| 1176 | DO k = nzb_y, nzt_y |
---|
[1216] | 1177 | DO i = nxl_y_l, nxr_y_l |
---|
[1210] | 1178 | |
---|
[1216] | 1179 | y_out(0) = CMPLX( ar_tr(0,i,k), 0.0 ) |
---|
[1210] | 1180 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1181 | y_out(j) = CMPLX( ar_tr(j,i,k), ar_tr(ny+1-j,i,k) ) |
---|
[1210] | 1182 | ENDDO |
---|
[1216] | 1183 | y_out((ny+1)/2) = CMPLX( ar_tr((ny+1)/2,i,k), 0.0 ) |
---|
[1210] | 1184 | |
---|
| 1185 | CALL FFTW_EXECUTE_DFT_C2R( plan_yi, y_out, y_in ) |
---|
| 1186 | ar(0:ny,i,k) = y_in(0:ny) |
---|
| 1187 | |
---|
| 1188 | ENDDO |
---|
| 1189 | ENDDO |
---|
| 1190 | !$OMP END PARALLEL |
---|
| 1191 | |
---|
| 1192 | ENDIF |
---|
| 1193 | #endif |
---|
| 1194 | |
---|
[1106] | 1195 | ELSEIF ( fft_method == 'system-specific' ) THEN |
---|
| 1196 | |
---|
| 1197 | #if defined( __ibm ) && ! defined( __ibmy_special ) |
---|
| 1198 | IF ( forward_fft) THEN |
---|
| 1199 | |
---|
| 1200 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 1201 | !$OMP DO |
---|
| 1202 | DO k = nzb_y, nzt_y |
---|
[1216] | 1203 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1204 | |
---|
[1320] | 1205 | CALL DRCFT( 0, ar, 1, work, 1, ny+1, 1, 1, sqr_dny, auy1, & |
---|
| 1206 | nau1, auy2, nau2 ) |
---|
[1106] | 1207 | |
---|
| 1208 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1209 | ar_tr(j,i,k) = work(2*j) |
---|
[1106] | 1210 | ENDDO |
---|
| 1211 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1212 | ar_tr(ny+1-j,i,k) = work(2*j+1) |
---|
[1106] | 1213 | ENDDO |
---|
| 1214 | |
---|
| 1215 | ENDDO |
---|
| 1216 | ENDDO |
---|
| 1217 | !$OMP END PARALLEL |
---|
| 1218 | |
---|
| 1219 | ELSE |
---|
| 1220 | |
---|
| 1221 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 1222 | !$OMP DO |
---|
| 1223 | DO k = nzb_y, nzt_y |
---|
[1216] | 1224 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1225 | |
---|
| 1226 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1227 | work(2*j) = ar_tr(j,i,k) |
---|
[1106] | 1228 | ENDDO |
---|
| 1229 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1230 | work(2*j+1) = ar_tr(ny+1-j,i,k) |
---|
[1106] | 1231 | ENDDO |
---|
| 1232 | work(1) = 0.0 |
---|
| 1233 | work(ny+2) = 0.0 |
---|
| 1234 | |
---|
[1320] | 1235 | CALL DCRFT( 0, work, 1, work, 1, ny+1, 1, -1, sqr_dny, & |
---|
| 1236 | auy3, nau1, auy4, nau2 ) |
---|
[1106] | 1237 | |
---|
| 1238 | DO j = 0, ny |
---|
| 1239 | ar(j,i,k) = work(j) |
---|
| 1240 | ENDDO |
---|
| 1241 | |
---|
| 1242 | ENDDO |
---|
| 1243 | ENDDO |
---|
| 1244 | !$OMP END PARALLEL |
---|
| 1245 | |
---|
| 1246 | ENDIF |
---|
| 1247 | #elif defined( __nec ) |
---|
| 1248 | IF ( forward_fft ) THEN |
---|
| 1249 | |
---|
| 1250 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 1251 | !$OMP DO |
---|
| 1252 | DO k = nzb_y, nzt_y |
---|
[1216] | 1253 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1254 | |
---|
| 1255 | work(0:ny) = ar(0:ny,i,k) |
---|
| 1256 | |
---|
| 1257 | CALL DZFFT( 1, ny+1, sqr_dny, work, work, trig_yf, work2, 0 ) |
---|
| 1258 | |
---|
| 1259 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1260 | ar_tr(j,i,k) = work(2*j) |
---|
[1106] | 1261 | ENDDO |
---|
| 1262 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1263 | ar_tr(ny+1-j,i,k) = work(2*j+1) |
---|
[1106] | 1264 | ENDDO |
---|
| 1265 | |
---|
| 1266 | ENDDO |
---|
| 1267 | ENDDO |
---|
| 1268 | !$END OMP PARALLEL |
---|
| 1269 | |
---|
| 1270 | ELSE |
---|
| 1271 | |
---|
| 1272 | !$OMP PARALLEL PRIVATE ( work, i, j, k ) |
---|
| 1273 | !$OMP DO |
---|
| 1274 | DO k = nzb_y, nzt_y |
---|
[1216] | 1275 | DO i = nxl_y_l, nxr_y_l |
---|
[1106] | 1276 | |
---|
| 1277 | DO j = 0, (ny+1)/2 |
---|
[1216] | 1278 | work(2*j) = ar_tr(j,i,k) |
---|
[1106] | 1279 | ENDDO |
---|
| 1280 | DO j = 1, (ny+1)/2 - 1 |
---|
[1216] | 1281 | work(2*j+1) = ar_tr(ny+1-j,i,k) |
---|
[1106] | 1282 | ENDDO |
---|
| 1283 | work(1) = 0.0 |
---|
| 1284 | work(ny+2) = 0.0 |
---|
| 1285 | |
---|
| 1286 | CALL ZDFFT( -1, ny+1, sqr_dny, work, work, trig_yb, work2, 0 ) |
---|
| 1287 | |
---|
| 1288 | ar(0:ny,i,k) = work(0:ny) |
---|
| 1289 | |
---|
| 1290 | ENDDO |
---|
| 1291 | ENDDO |
---|
| 1292 | !$OMP END PARALLEL |
---|
| 1293 | |
---|
| 1294 | ENDIF |
---|
| 1295 | #elif defined( __cuda_fft ) |
---|
| 1296 | |
---|
| 1297 | IF ( forward_fft ) THEN |
---|
| 1298 | |
---|
[1111] | 1299 | !$acc data present( ar ) |
---|
| 1300 | CALL CUFFTEXECD2Z( plan_yf, ar, ar_tmp ) |
---|
[1106] | 1301 | |
---|
[1111] | 1302 | !$acc kernels |
---|
[1106] | 1303 | DO k = nzb_y, nzt_y |
---|
| 1304 | DO i = nxl_y, nxr_y |
---|
| 1305 | |
---|
| 1306 | DO j = 0, (ny+1)/2 |
---|
[1111] | 1307 | ar(j,i,k) = REAL( ar_tmp(j,i,k) ) * dny |
---|
[1106] | 1308 | ENDDO |
---|
| 1309 | |
---|
| 1310 | DO j = 1, (ny+1)/2 - 1 |
---|
[1111] | 1311 | ar(ny+1-j,i,k) = AIMAG( ar_tmp(j,i,k) ) * dny |
---|
[1106] | 1312 | ENDDO |
---|
| 1313 | |
---|
| 1314 | ENDDO |
---|
| 1315 | ENDDO |
---|
[1111] | 1316 | !$acc end kernels |
---|
| 1317 | !$acc end data |
---|
[1106] | 1318 | |
---|
| 1319 | ELSE |
---|
| 1320 | |
---|
[1111] | 1321 | !$acc data present( ar ) |
---|
| 1322 | !$acc kernels |
---|
[1106] | 1323 | DO k = nzb_y, nzt_y |
---|
| 1324 | DO i = nxl_y, nxr_y |
---|
| 1325 | |
---|
[1111] | 1326 | ar_tmp(0,i,k) = CMPLX( ar(0,i,k), 0.0 ) |
---|
[1106] | 1327 | |
---|
| 1328 | DO j = 1, (ny+1)/2 - 1 |
---|
[1111] | 1329 | ar_tmp(j,i,k) = CMPLX( ar(j,i,k), ar(ny+1-j,i,k) ) |
---|
[1106] | 1330 | ENDDO |
---|
[1111] | 1331 | ar_tmp((ny+1)/2,i,k) = CMPLX( ar((ny+1)/2,i,k), 0.0 ) |
---|
[1106] | 1332 | |
---|
| 1333 | ENDDO |
---|
| 1334 | ENDDO |
---|
[1111] | 1335 | !$acc end kernels |
---|
[1106] | 1336 | |
---|
[1111] | 1337 | CALL CUFFTEXECZ2D( plan_yi, ar_tmp, ar ) |
---|
| 1338 | !$acc end data |
---|
[1106] | 1339 | |
---|
| 1340 | ENDIF |
---|
| 1341 | |
---|
| 1342 | #else |
---|
| 1343 | message_string = 'no system-specific fft-call available' |
---|
| 1344 | CALL message( 'fft_y', 'PA0188', 1, 2, 0, 6, 0 ) |
---|
| 1345 | #endif |
---|
| 1346 | |
---|
| 1347 | ELSE |
---|
| 1348 | |
---|
| 1349 | message_string = 'fft method "' // TRIM( fft_method) // & |
---|
| 1350 | '" not available' |
---|
| 1351 | CALL message( 'fft_y', 'PA0189', 1, 2, 0, 6, 0 ) |
---|
| 1352 | |
---|
| 1353 | ENDIF |
---|
| 1354 | |
---|
| 1355 | END SUBROUTINE fft_y |
---|
| 1356 | |
---|
| 1357 | SUBROUTINE fft_y_1d( ar, direction ) |
---|
| 1358 | |
---|
| 1359 | !----------------------------------------------------------------------! |
---|
| 1360 | ! fft_y_1d ! |
---|
| 1361 | ! ! |
---|
| 1362 | ! Fourier-transformation along y-direction ! |
---|
| 1363 | ! Version for 1D-decomposition ! |
---|
| 1364 | ! ! |
---|
| 1365 | ! fft_y uses internal algorithms (Singleton or Temperton) or ! |
---|
| 1366 | ! system-specific routines, if they are available ! |
---|
| 1367 | !----------------------------------------------------------------------! |
---|
| 1368 | |
---|
| 1369 | IMPLICIT NONE |
---|
| 1370 | |
---|
| 1371 | CHARACTER (LEN=*) :: direction |
---|
[1320] | 1372 | |
---|
| 1373 | INTEGER(iwp) :: j !: |
---|
| 1374 | INTEGER(iwp) :: jshape(1) !: |
---|
[1] | 1375 | |
---|
[1320] | 1376 | LOGICAL :: forward_fft !: |
---|
[1106] | 1377 | |
---|
[1320] | 1378 | REAL(wp), DIMENSION(0:ny) :: ar !: |
---|
| 1379 | REAL(wp), DIMENSION(0:ny+2) :: work !: |
---|
| 1380 | REAL(wp), DIMENSION(ny+2) :: work1 !: |
---|
| 1381 | |
---|
| 1382 | COMPLEX(wp), DIMENSION(:), ALLOCATABLE :: cwork !: |
---|
| 1383 | |
---|
[1] | 1384 | #if defined( __ibm ) |
---|
[1320] | 1385 | REAL(wp), DIMENSION(nau2) :: auy2 !: |
---|
| 1386 | REAL(wp), DIMENSION(nau2) :: auy4 !: |
---|
[1] | 1387 | #elif defined( __nec ) |
---|
[1320] | 1388 | REAL(wp), DIMENSION(6*(ny+1)) :: work2 !: |
---|
[1] | 1389 | #endif |
---|
| 1390 | |
---|
[1106] | 1391 | IF ( direction == 'forward' ) THEN |
---|
| 1392 | forward_fft = .TRUE. |
---|
| 1393 | ELSE |
---|
| 1394 | forward_fft = .FALSE. |
---|
| 1395 | ENDIF |
---|
| 1396 | |
---|
[1] | 1397 | IF ( fft_method == 'singleton-algorithm' ) THEN |
---|
| 1398 | |
---|
| 1399 | ! |
---|
| 1400 | !-- Performing the fft with singleton's software works on every system, |
---|
| 1401 | !-- since it is part of the model |
---|
| 1402 | ALLOCATE( cwork(0:ny) ) |
---|
| 1403 | |
---|
[1106] | 1404 | IF ( forward_fft ) THEN |
---|
[1] | 1405 | |
---|
| 1406 | DO j = 0, ny |
---|
| 1407 | cwork(j) = CMPLX( ar(j) ) |
---|
| 1408 | ENDDO |
---|
| 1409 | |
---|
| 1410 | jshape = SHAPE( cwork ) |
---|
| 1411 | CALL FFTN( cwork, jshape ) |
---|
| 1412 | |
---|
| 1413 | DO j = 0, (ny+1)/2 |
---|
| 1414 | ar(j) = REAL( cwork(j) ) |
---|
| 1415 | ENDDO |
---|
| 1416 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1417 | ar(ny+1-j) = -AIMAG( cwork(j) ) |
---|
| 1418 | ENDDO |
---|
| 1419 | |
---|
| 1420 | ELSE |
---|
| 1421 | |
---|
| 1422 | cwork(0) = CMPLX( ar(0), 0.0 ) |
---|
| 1423 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1424 | cwork(j) = CMPLX( ar(j), -ar(ny+1-j) ) |
---|
| 1425 | cwork(ny+1-j) = CMPLX( ar(j), ar(ny+1-j) ) |
---|
| 1426 | ENDDO |
---|
| 1427 | cwork((ny+1)/2) = CMPLX( ar((ny+1)/2), 0.0 ) |
---|
| 1428 | |
---|
| 1429 | jshape = SHAPE( cwork ) |
---|
| 1430 | CALL FFTN( cwork, jshape, inv = .TRUE. ) |
---|
| 1431 | |
---|
| 1432 | DO j = 0, ny |
---|
| 1433 | ar(j) = REAL( cwork(j) ) |
---|
| 1434 | ENDDO |
---|
| 1435 | |
---|
| 1436 | ENDIF |
---|
| 1437 | |
---|
| 1438 | DEALLOCATE( cwork ) |
---|
| 1439 | |
---|
| 1440 | ELSEIF ( fft_method == 'temperton-algorithm' ) THEN |
---|
| 1441 | |
---|
| 1442 | ! |
---|
| 1443 | !-- Performing the fft with Temperton's software works on every system, |
---|
| 1444 | !-- since it is part of the model |
---|
[1106] | 1445 | IF ( forward_fft ) THEN |
---|
[1] | 1446 | |
---|
| 1447 | work(0:ny) = ar |
---|
| 1448 | CALL fft991cy( work, work1, trigs_y, ifax_y, 1, ny+1, ny+1, 1, -1 ) |
---|
| 1449 | |
---|
| 1450 | DO j = 0, (ny+1)/2 |
---|
| 1451 | ar(j) = work(2*j) |
---|
| 1452 | ENDDO |
---|
| 1453 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1454 | ar(ny+1-j) = work(2*j+1) |
---|
| 1455 | ENDDO |
---|
| 1456 | |
---|
| 1457 | ELSE |
---|
| 1458 | |
---|
| 1459 | DO j = 0, (ny+1)/2 |
---|
| 1460 | work(2*j) = ar(j) |
---|
| 1461 | ENDDO |
---|
| 1462 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1463 | work(2*j+1) = ar(ny+1-j) |
---|
| 1464 | ENDDO |
---|
| 1465 | work(1) = 0.0 |
---|
| 1466 | work(ny+2) = 0.0 |
---|
| 1467 | |
---|
| 1468 | CALL fft991cy( work, work1, trigs_y, ifax_y, 1, ny+1, ny+1, 1, 1 ) |
---|
| 1469 | ar = work(0:ny) |
---|
| 1470 | |
---|
| 1471 | ENDIF |
---|
| 1472 | |
---|
[1216] | 1473 | ELSEIF ( fft_method == 'fftw' ) THEN |
---|
| 1474 | |
---|
| 1475 | #if defined( __fftw ) |
---|
| 1476 | IF ( forward_fft ) THEN |
---|
| 1477 | |
---|
| 1478 | y_in(0:ny) = ar(0:ny) |
---|
| 1479 | CALL FFTW_EXECUTE_DFT_R2C( plan_yf, y_in, y_out ) |
---|
| 1480 | |
---|
| 1481 | DO j = 0, (ny+1)/2 |
---|
| 1482 | ar(j) = REAL( y_out(j) ) / (ny+1) |
---|
| 1483 | ENDDO |
---|
| 1484 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1485 | ar(ny+1-j) = AIMAG( y_out(j) ) / (ny+1) |
---|
| 1486 | ENDDO |
---|
| 1487 | |
---|
| 1488 | ELSE |
---|
| 1489 | |
---|
| 1490 | y_out(0) = CMPLX( ar(0), 0.0 ) |
---|
| 1491 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1492 | y_out(j) = CMPLX( ar(j), ar(ny+1-j) ) |
---|
| 1493 | ENDDO |
---|
| 1494 | y_out((ny+1)/2) = CMPLX( ar((ny+1)/2), 0.0 ) |
---|
| 1495 | |
---|
| 1496 | CALL FFTW_EXECUTE_DFT_C2R( plan_yi, y_out, y_in ) |
---|
| 1497 | ar(0:ny) = y_in(0:ny) |
---|
| 1498 | |
---|
| 1499 | ENDIF |
---|
| 1500 | #endif |
---|
| 1501 | |
---|
[1] | 1502 | ELSEIF ( fft_method == 'system-specific' ) THEN |
---|
| 1503 | |
---|
| 1504 | #if defined( __ibm ) && ! defined( __ibmy_special ) |
---|
[1106] | 1505 | IF ( forward_fft ) THEN |
---|
[1] | 1506 | |
---|
[1320] | 1507 | CALL DRCFT( 0, ar, 1, work, 1, ny+1, 1, 1, sqr_dny, auy1, nau1, & |
---|
[1] | 1508 | auy2, nau2 ) |
---|
| 1509 | |
---|
| 1510 | DO j = 0, (ny+1)/2 |
---|
| 1511 | ar(j) = work(2*j) |
---|
| 1512 | ENDDO |
---|
| 1513 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1514 | ar(ny+1-j) = work(2*j+1) |
---|
| 1515 | ENDDO |
---|
| 1516 | |
---|
| 1517 | ELSE |
---|
| 1518 | |
---|
| 1519 | DO j = 0, (ny+1)/2 |
---|
| 1520 | work(2*j) = ar(j) |
---|
| 1521 | ENDDO |
---|
| 1522 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1523 | work(2*j+1) = ar(ny+1-j) |
---|
| 1524 | ENDDO |
---|
| 1525 | work(1) = 0.0 |
---|
| 1526 | work(ny+2) = 0.0 |
---|
| 1527 | |
---|
[1320] | 1528 | CALL DCRFT( 0, work, 1, work, 1, ny+1, 1, -1, sqr_dny, auy3, & |
---|
| 1529 | nau1, auy4, nau2 ) |
---|
[1] | 1530 | |
---|
| 1531 | DO j = 0, ny |
---|
| 1532 | ar(j) = work(j) |
---|
| 1533 | ENDDO |
---|
| 1534 | |
---|
| 1535 | ENDIF |
---|
| 1536 | #elif defined( __nec ) |
---|
[1106] | 1537 | IF ( forward_fft ) THEN |
---|
[1] | 1538 | |
---|
| 1539 | work(0:ny) = ar(0:ny) |
---|
| 1540 | |
---|
[1106] | 1541 | CALL DZFFT( 1, ny+1, sqr_dny, work, work, trig_yf, work2, 0 ) |
---|
[1] | 1542 | |
---|
| 1543 | DO j = 0, (ny+1)/2 |
---|
| 1544 | ar(j) = work(2*j) |
---|
| 1545 | ENDDO |
---|
| 1546 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1547 | ar(ny+1-j) = work(2*j+1) |
---|
| 1548 | ENDDO |
---|
| 1549 | |
---|
| 1550 | ELSE |
---|
| 1551 | |
---|
| 1552 | DO j = 0, (ny+1)/2 |
---|
| 1553 | work(2*j) = ar(j) |
---|
| 1554 | ENDDO |
---|
| 1555 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1556 | work(2*j+1) = ar(ny+1-j) |
---|
| 1557 | ENDDO |
---|
| 1558 | work(1) = 0.0 |
---|
| 1559 | work(ny+2) = 0.0 |
---|
| 1560 | |
---|
[1106] | 1561 | CALL ZDFFT( -1, ny+1, sqr_dny, work, work, trig_yb, work2, 0 ) |
---|
[1] | 1562 | |
---|
| 1563 | ar(0:ny) = work(0:ny) |
---|
| 1564 | |
---|
| 1565 | ENDIF |
---|
| 1566 | #else |
---|
[254] | 1567 | message_string = 'no system-specific fft-call available' |
---|
[1106] | 1568 | CALL message( 'fft_y_1d', 'PA0188', 1, 2, 0, 6, 0 ) |
---|
[254] | 1569 | |
---|
[1] | 1570 | #endif |
---|
| 1571 | |
---|
| 1572 | ELSE |
---|
| 1573 | |
---|
[274] | 1574 | message_string = 'fft method "' // TRIM( fft_method) // & |
---|
| 1575 | '" not available' |
---|
[1106] | 1576 | CALL message( 'fft_y_1d', 'PA0189', 1, 2, 0, 6, 0 ) |
---|
[1] | 1577 | |
---|
| 1578 | ENDIF |
---|
| 1579 | |
---|
[1106] | 1580 | END SUBROUTINE fft_y_1d |
---|
[1] | 1581 | |
---|
| 1582 | SUBROUTINE fft_x_m( ar, direction ) |
---|
| 1583 | |
---|
| 1584 | !----------------------------------------------------------------------! |
---|
| 1585 | ! fft_x_m ! |
---|
| 1586 | ! ! |
---|
| 1587 | ! Fourier-transformation along x-direction ! |
---|
| 1588 | ! Version for 1d domain decomposition ! |
---|
| 1589 | ! using multiple 1D FFT from Math Keisan on NEC ! |
---|
| 1590 | ! or Temperton-algorithm ! |
---|
| 1591 | ! (no singleton-algorithm on NEC because it does not vectorize) ! |
---|
| 1592 | ! ! |
---|
| 1593 | !----------------------------------------------------------------------! |
---|
| 1594 | |
---|
| 1595 | IMPLICIT NONE |
---|
| 1596 | |
---|
[1320] | 1597 | CHARACTER (LEN=*) :: direction !: |
---|
| 1598 | |
---|
| 1599 | INTEGER(iwp) :: i !: |
---|
| 1600 | INTEGER(iwp) :: k !: |
---|
| 1601 | INTEGER(iwp) :: siza !: |
---|
[1] | 1602 | |
---|
[1320] | 1603 | REAL(wp), DIMENSION(0:nx,nz) :: ar !: |
---|
| 1604 | REAL(wp), DIMENSION(0:nx+3,nz+1) :: ai !: |
---|
| 1605 | REAL(wp), DIMENSION(6*(nx+4),nz+1) :: work1 !: |
---|
| 1606 | |
---|
[1] | 1607 | #if defined( __nec ) |
---|
[1320] | 1608 | INTEGER(iwp) :: sizw !: |
---|
| 1609 | |
---|
| 1610 | COMPLEX(wp), DIMENSION((nx+4)/2+1,nz+1) :: work !: |
---|
[1] | 1611 | #endif |
---|
| 1612 | |
---|
| 1613 | IF ( fft_method == 'temperton-algorithm' ) THEN |
---|
| 1614 | |
---|
| 1615 | siza = SIZE( ai, 1 ) |
---|
| 1616 | |
---|
| 1617 | IF ( direction == 'forward') THEN |
---|
| 1618 | |
---|
| 1619 | ai(0:nx,1:nz) = ar(0:nx,1:nz) |
---|
| 1620 | ai(nx+1:,:) = 0.0 |
---|
| 1621 | |
---|
| 1622 | CALL fft991cy( ai, work1, trigs_x, ifax_x, 1, siza, nx+1, nz, -1 ) |
---|
| 1623 | |
---|
| 1624 | DO k = 1, nz |
---|
| 1625 | DO i = 0, (nx+1)/2 |
---|
| 1626 | ar(i,k) = ai(2*i,k) |
---|
| 1627 | ENDDO |
---|
| 1628 | DO i = 1, (nx+1)/2 - 1 |
---|
| 1629 | ar(nx+1-i,k) = ai(2*i+1,k) |
---|
| 1630 | ENDDO |
---|
| 1631 | ENDDO |
---|
| 1632 | |
---|
| 1633 | ELSE |
---|
| 1634 | |
---|
| 1635 | DO k = 1, nz |
---|
| 1636 | DO i = 0, (nx+1)/2 |
---|
| 1637 | ai(2*i,k) = ar(i,k) |
---|
| 1638 | ENDDO |
---|
| 1639 | DO i = 1, (nx+1)/2 - 1 |
---|
| 1640 | ai(2*i+1,k) = ar(nx+1-i,k) |
---|
| 1641 | ENDDO |
---|
| 1642 | ai(1,k) = 0.0 |
---|
| 1643 | ai(nx+2,k) = 0.0 |
---|
| 1644 | ENDDO |
---|
| 1645 | |
---|
| 1646 | CALL fft991cy( ai, work1, trigs_x, ifax_x, 1, siza, nx+1, nz, 1 ) |
---|
| 1647 | |
---|
| 1648 | ar(0:nx,1:nz) = ai(0:nx,1:nz) |
---|
| 1649 | |
---|
| 1650 | ENDIF |
---|
| 1651 | |
---|
| 1652 | ELSEIF ( fft_method == 'system-specific' ) THEN |
---|
| 1653 | |
---|
| 1654 | #if defined( __nec ) |
---|
| 1655 | siza = SIZE( ai, 1 ) |
---|
| 1656 | sizw = SIZE( work, 1 ) |
---|
| 1657 | |
---|
| 1658 | IF ( direction == 'forward') THEN |
---|
| 1659 | |
---|
| 1660 | ! |
---|
| 1661 | !-- Tables are initialized once more. This call should not be |
---|
| 1662 | !-- necessary, but otherwise program aborts in asymmetric case |
---|
[1320] | 1663 | CALL DZFFTM( 0, nx+1, nz1, sqr_dnx, work, nx+4, work, nx+4, & |
---|
[1] | 1664 | trig_xf, work1, 0 ) |
---|
| 1665 | |
---|
| 1666 | ai(0:nx,1:nz) = ar(0:nx,1:nz) |
---|
| 1667 | IF ( nz1 > nz ) THEN |
---|
| 1668 | ai(:,nz1) = 0.0 |
---|
| 1669 | ENDIF |
---|
| 1670 | |
---|
[1320] | 1671 | CALL DZFFTM( 1, nx+1, nz1, sqr_dnx, ai, siza, work, sizw, & |
---|
[1] | 1672 | trig_xf, work1, 0 ) |
---|
| 1673 | |
---|
| 1674 | DO k = 1, nz |
---|
| 1675 | DO i = 0, (nx+1)/2 |
---|
| 1676 | ar(i,k) = REAL( work(i+1,k) ) |
---|
| 1677 | ENDDO |
---|
| 1678 | DO i = 1, (nx+1)/2 - 1 |
---|
| 1679 | ar(nx+1-i,k) = AIMAG( work(i+1,k) ) |
---|
| 1680 | ENDDO |
---|
| 1681 | ENDDO |
---|
| 1682 | |
---|
| 1683 | ELSE |
---|
| 1684 | |
---|
| 1685 | ! |
---|
| 1686 | !-- Tables are initialized once more. This call should not be |
---|
| 1687 | !-- necessary, but otherwise program aborts in asymmetric case |
---|
[1320] | 1688 | CALL ZDFFTM( 0, nx+1, nz1, sqr_dnx, work, nx+4, work, nx+4, & |
---|
[1] | 1689 | trig_xb, work1, 0 ) |
---|
| 1690 | |
---|
| 1691 | IF ( nz1 > nz ) THEN |
---|
| 1692 | work(:,nz1) = 0.0 |
---|
| 1693 | ENDIF |
---|
| 1694 | DO k = 1, nz |
---|
| 1695 | work(1,k) = CMPLX( ar(0,k), 0.0 ) |
---|
| 1696 | DO i = 1, (nx+1)/2 - 1 |
---|
| 1697 | work(i+1,k) = CMPLX( ar(i,k), ar(nx+1-i,k) ) |
---|
| 1698 | ENDDO |
---|
| 1699 | work(((nx+1)/2)+1,k) = CMPLX( ar((nx+1)/2,k), 0.0 ) |
---|
| 1700 | ENDDO |
---|
| 1701 | |
---|
[1106] | 1702 | CALL ZDFFTM( -1, nx+1, nz1, sqr_dnx, work, sizw, ai, siza, & |
---|
[1] | 1703 | trig_xb, work1, 0 ) |
---|
| 1704 | |
---|
| 1705 | ar(0:nx,1:nz) = ai(0:nx,1:nz) |
---|
| 1706 | |
---|
| 1707 | ENDIF |
---|
| 1708 | |
---|
| 1709 | #else |
---|
[254] | 1710 | message_string = 'no system-specific fft-call available' |
---|
| 1711 | CALL message( 'fft_x_m', 'PA0188', 1, 2, 0, 6, 0 ) |
---|
[1] | 1712 | #endif |
---|
| 1713 | |
---|
| 1714 | ELSE |
---|
| 1715 | |
---|
[274] | 1716 | message_string = 'fft method "' // TRIM( fft_method) // & |
---|
| 1717 | '" not available' |
---|
[254] | 1718 | CALL message( 'fft_x_m', 'PA0189', 1, 2, 0, 6, 0 ) |
---|
[1] | 1719 | |
---|
| 1720 | ENDIF |
---|
| 1721 | |
---|
| 1722 | END SUBROUTINE fft_x_m |
---|
| 1723 | |
---|
| 1724 | SUBROUTINE fft_y_m( ar, ny1, direction ) |
---|
| 1725 | |
---|
| 1726 | !----------------------------------------------------------------------! |
---|
| 1727 | ! fft_y_m ! |
---|
| 1728 | ! ! |
---|
| 1729 | ! Fourier-transformation along y-direction ! |
---|
| 1730 | ! Version for 1d domain decomposition ! |
---|
| 1731 | ! using multiple 1D FFT from Math Keisan on NEC ! |
---|
| 1732 | ! or Temperton-algorithm ! |
---|
| 1733 | ! (no singleton-algorithm on NEC because it does not vectorize) ! |
---|
| 1734 | ! ! |
---|
| 1735 | !----------------------------------------------------------------------! |
---|
| 1736 | |
---|
| 1737 | IMPLICIT NONE |
---|
| 1738 | |
---|
[1320] | 1739 | CHARACTER (LEN=*) :: direction !: |
---|
| 1740 | |
---|
| 1741 | INTEGER(iwp) :: j !: |
---|
| 1742 | INTEGER(iwp) :: k !: |
---|
| 1743 | INTEGER(iwp) :: ny1 !: |
---|
| 1744 | INTEGER(iwp) :: siza !: |
---|
[1] | 1745 | |
---|
[1320] | 1746 | REAL(wp), DIMENSION(0:ny1,nz) :: ar !: |
---|
| 1747 | REAL(wp), DIMENSION(0:ny+3,nz+1) :: ai !: |
---|
| 1748 | REAL(wp), DIMENSION(6*(ny+4),nz+1) :: work1 !: |
---|
| 1749 | |
---|
[1] | 1750 | #if defined( __nec ) |
---|
[1320] | 1751 | INTEGER(iwp) :: sizw !: |
---|
| 1752 | |
---|
| 1753 | COMPLEX(wp), DIMENSION((ny+4)/2+1,nz+1) :: work !: |
---|
[1] | 1754 | #endif |
---|
| 1755 | |
---|
| 1756 | IF ( fft_method == 'temperton-algorithm' ) THEN |
---|
| 1757 | |
---|
| 1758 | siza = SIZE( ai, 1 ) |
---|
| 1759 | |
---|
| 1760 | IF ( direction == 'forward') THEN |
---|
| 1761 | |
---|
| 1762 | ai(0:ny,1:nz) = ar(0:ny,1:nz) |
---|
| 1763 | ai(ny+1:,:) = 0.0 |
---|
| 1764 | |
---|
| 1765 | CALL fft991cy( ai, work1, trigs_y, ifax_y, 1, siza, ny+1, nz, -1 ) |
---|
| 1766 | |
---|
| 1767 | DO k = 1, nz |
---|
| 1768 | DO j = 0, (ny+1)/2 |
---|
| 1769 | ar(j,k) = ai(2*j,k) |
---|
| 1770 | ENDDO |
---|
| 1771 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1772 | ar(ny+1-j,k) = ai(2*j+1,k) |
---|
| 1773 | ENDDO |
---|
| 1774 | ENDDO |
---|
| 1775 | |
---|
| 1776 | ELSE |
---|
| 1777 | |
---|
| 1778 | DO k = 1, nz |
---|
| 1779 | DO j = 0, (ny+1)/2 |
---|
| 1780 | ai(2*j,k) = ar(j,k) |
---|
| 1781 | ENDDO |
---|
| 1782 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1783 | ai(2*j+1,k) = ar(ny+1-j,k) |
---|
| 1784 | ENDDO |
---|
| 1785 | ai(1,k) = 0.0 |
---|
| 1786 | ai(ny+2,k) = 0.0 |
---|
| 1787 | ENDDO |
---|
| 1788 | |
---|
| 1789 | CALL fft991cy( ai, work1, trigs_y, ifax_y, 1, siza, ny+1, nz, 1 ) |
---|
| 1790 | |
---|
| 1791 | ar(0:ny,1:nz) = ai(0:ny,1:nz) |
---|
| 1792 | |
---|
| 1793 | ENDIF |
---|
| 1794 | |
---|
| 1795 | ELSEIF ( fft_method == 'system-specific' ) THEN |
---|
| 1796 | |
---|
| 1797 | #if defined( __nec ) |
---|
| 1798 | siza = SIZE( ai, 1 ) |
---|
| 1799 | sizw = SIZE( work, 1 ) |
---|
| 1800 | |
---|
| 1801 | IF ( direction == 'forward') THEN |
---|
| 1802 | |
---|
| 1803 | ! |
---|
| 1804 | !-- Tables are initialized once more. This call should not be |
---|
| 1805 | !-- necessary, but otherwise program aborts in asymmetric case |
---|
[1106] | 1806 | CALL DZFFTM( 0, ny+1, nz1, sqr_dny, work, ny+4, work, ny+4, & |
---|
[1] | 1807 | trig_yf, work1, 0 ) |
---|
| 1808 | |
---|
| 1809 | ai(0:ny,1:nz) = ar(0:ny,1:nz) |
---|
| 1810 | IF ( nz1 > nz ) THEN |
---|
| 1811 | ai(:,nz1) = 0.0 |
---|
| 1812 | ENDIF |
---|
| 1813 | |
---|
[1106] | 1814 | CALL DZFFTM( 1, ny+1, nz1, sqr_dny, ai, siza, work, sizw, & |
---|
[1] | 1815 | trig_yf, work1, 0 ) |
---|
| 1816 | |
---|
| 1817 | DO k = 1, nz |
---|
| 1818 | DO j = 0, (ny+1)/2 |
---|
| 1819 | ar(j,k) = REAL( work(j+1,k) ) |
---|
| 1820 | ENDDO |
---|
| 1821 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1822 | ar(ny+1-j,k) = AIMAG( work(j+1,k) ) |
---|
| 1823 | ENDDO |
---|
| 1824 | ENDDO |
---|
| 1825 | |
---|
| 1826 | ELSE |
---|
| 1827 | |
---|
| 1828 | ! |
---|
| 1829 | !-- Tables are initialized once more. This call should not be |
---|
| 1830 | !-- necessary, but otherwise program aborts in asymmetric case |
---|
[1106] | 1831 | CALL ZDFFTM( 0, ny+1, nz1, sqr_dny, work, ny+4, work, ny+4, & |
---|
[1] | 1832 | trig_yb, work1, 0 ) |
---|
| 1833 | |
---|
| 1834 | IF ( nz1 > nz ) THEN |
---|
| 1835 | work(:,nz1) = 0.0 |
---|
| 1836 | ENDIF |
---|
| 1837 | DO k = 1, nz |
---|
| 1838 | work(1,k) = CMPLX( ar(0,k), 0.0 ) |
---|
| 1839 | DO j = 1, (ny+1)/2 - 1 |
---|
| 1840 | work(j+1,k) = CMPLX( ar(j,k), ar(ny+1-j,k) ) |
---|
| 1841 | ENDDO |
---|
| 1842 | work(((ny+1)/2)+1,k) = CMPLX( ar((ny+1)/2,k), 0.0 ) |
---|
| 1843 | ENDDO |
---|
| 1844 | |
---|
[1106] | 1845 | CALL ZDFFTM( -1, ny+1, nz1, sqr_dny, work, sizw, ai, siza, & |
---|
[1] | 1846 | trig_yb, work1, 0 ) |
---|
| 1847 | |
---|
| 1848 | ar(0:ny,1:nz) = ai(0:ny,1:nz) |
---|
| 1849 | |
---|
| 1850 | ENDIF |
---|
| 1851 | |
---|
| 1852 | #else |
---|
[254] | 1853 | message_string = 'no system-specific fft-call available' |
---|
| 1854 | CALL message( 'fft_y_m', 'PA0188', 1, 2, 0, 6, 0 ) |
---|
[1] | 1855 | #endif |
---|
| 1856 | |
---|
| 1857 | ELSE |
---|
[254] | 1858 | |
---|
[274] | 1859 | message_string = 'fft method "' // TRIM( fft_method) // & |
---|
| 1860 | '" not available' |
---|
[254] | 1861 | CALL message( 'fft_x_m', 'PA0189', 1, 2, 0, 6, 0 ) |
---|
[1] | 1862 | |
---|
| 1863 | ENDIF |
---|
| 1864 | |
---|
| 1865 | END SUBROUTINE fft_y_m |
---|
| 1866 | |
---|
[1106] | 1867 | |
---|
[1] | 1868 | END MODULE fft_xy |
---|