1 | MODULE lib_fortran |
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2 | !!====================================================================== |
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3 | !! *** MODULE lib_fortran *** |
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4 | !! Fortran utilities: includes some low levels fortran functionality |
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5 | !!====================================================================== |
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6 | !! History : 3.2 ! 2010-05 (M. Dunphy, R. Benshila) Original code |
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7 | !!---------------------------------------------------------------------- |
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8 | |
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9 | !!---------------------------------------------------------------------- |
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10 | !! glob_sum : generic interface for global masked summation over |
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11 | !! the interior domain for 1 or 2 2D or 3D arrays |
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12 | !! it works only for T points |
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13 | !! SIGN : generic interface for SIGN to overwrite f95 behaviour |
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14 | !! of intrinsinc sign function |
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15 | !!---------------------------------------------------------------------- |
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16 | USE par_oce ! Ocean parameter |
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17 | USE lib_mpp ! distributed memory computing |
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18 | USE dom_oce ! ocean domain |
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19 | USE in_out_manager ! I/O manager |
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20 | |
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21 | IMPLICIT NONE |
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22 | PRIVATE |
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23 | |
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24 | PUBLIC glob_sum |
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25 | #if defined key_nosignedzero |
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26 | PUBLIC SIGN |
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27 | #endif |
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28 | |
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29 | INTERFACE glob_sum |
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30 | MODULE PROCEDURE glob_sum_2d, glob_sum_3d, glob_sum_2d_a, glob_sum_3d_a |
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31 | END INTERFACE |
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32 | |
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33 | #if defined key_nosignedzero |
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34 | INTERFACE SIGN |
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35 | MODULE PROCEDURE SIGN_SCALAR, SIGN_ARRAY_1D, SIGN_ARRAY_2D, SIGN_ARRAY_3D, & |
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36 | & SIGN_ARRAY_1D_A, SIGN_ARRAY_2D_A, SIGN_ARRAY_3D_A, & |
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37 | & SIGN_ARRAY_1D_B, SIGN_ARRAY_2D_B, SIGN_ARRAY_3D_B |
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38 | END INTERFACE |
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39 | #endif |
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40 | |
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41 | !! * Control permutation of array indices |
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42 | # include "dom_oce_ftrans.h90" |
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43 | |
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44 | !!---------------------------------------------------------------------- |
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45 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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46 | !! $Id$ |
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47 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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48 | !!---------------------------------------------------------------------- |
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49 | CONTAINS |
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50 | |
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51 | #if ! defined key_mpp_rep |
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52 | FUNCTION glob_sum_2d( ptab ) RESULT( glob_sum ) |
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53 | !!----------------------------------------------------------------------- |
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54 | !! *** FUNCTION glob_sum_2D *** |
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55 | !! |
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56 | !! ** Purpose : perform a masked sum on the inner global domain of a 2D array |
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57 | !!----------------------------------------------------------------------- |
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58 | REAL(wp), INTENT(in), DIMENSION(:,:) :: ptab ! input 2D array |
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59 | REAL(wp) :: glob_sum ! global masked sum |
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60 | !!----------------------------------------------------------------------- |
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61 | ! |
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62 | glob_sum = SUM( ptab(:,:)*tmask_i(:,:) ) |
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63 | IF( lk_mpp ) CALL mpp_sum( glob_sum ) |
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64 | ! |
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65 | END FUNCTION glob_sum_2d |
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66 | |
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67 | |
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68 | FUNCTION glob_sum_3d( ptab ) RESULT( glob_sum ) |
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69 | !!----------------------------------------------------------------------- |
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70 | !! *** FUNCTION glob_sum_3D *** |
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71 | !! |
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72 | !! ** Purpose : perform a masked sum on the inner global domain of a 3D array |
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73 | !!----------------------------------------------------------------------- |
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74 | !FTRANS ptab :I :I :z |
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75 | REAL(wp), INTENT(in), DIMENSION(:,:,:) :: ptab ! input 3D array |
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76 | REAL(wp) :: glob_sum ! global masked sum |
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77 | !! |
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78 | INTEGER :: jk |
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79 | #if defined key_z_first |
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80 | INTEGER :: ji, jj |
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81 | REAL(wp) :: ztmask |
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82 | #endif |
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83 | !!----------------------------------------------------------------------- |
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84 | ! |
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85 | glob_sum = 0.e0 |
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86 | #if defined key_z_first |
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87 | DO jj = 1, jpj |
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88 | DO ji = 1, jpi |
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89 | ztmask = tmask_i(ji,jj) |
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90 | DO jk = 1, jpk |
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91 | glob_sum = glob_sum + ptab(ji,jj,jk)*ztmask |
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92 | END DO |
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93 | END DO |
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94 | END DO |
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95 | #else |
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96 | DO jk = 1, jpk |
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97 | glob_sum = glob_sum + SUM( ptab(:,:,jk)*tmask_i(:,:) ) |
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98 | END DO |
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99 | #endif |
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100 | IF( lk_mpp ) CALL mpp_sum( glob_sum ) |
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101 | ! |
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102 | END FUNCTION glob_sum_3d |
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103 | |
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104 | |
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105 | FUNCTION glob_sum_2d_a( ptab1, ptab2 ) RESULT( glob_sum ) |
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106 | !!----------------------------------------------------------------------- |
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107 | !! *** FUNCTION glob_sum_2D _a *** |
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108 | !! |
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109 | !! ** Purpose : perform a masked sum on the inner global domain of two 2D array |
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110 | !!----------------------------------------------------------------------- |
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111 | REAL(wp), INTENT(in), DIMENSION(:,:) :: ptab1, ptab2 ! input 2D array |
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112 | REAL(wp) , DIMENSION(2) :: glob_sum ! global masked sum |
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113 | !!----------------------------------------------------------------------- |
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114 | ! |
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115 | glob_sum(1) = SUM( ptab1(:,:)*tmask_i(:,:) ) |
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116 | glob_sum(2) = SUM( ptab2(:,:)*tmask_i(:,:) ) |
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117 | IF( lk_mpp ) CALL mpp_sum( glob_sum, 2 ) |
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118 | ! |
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119 | END FUNCTION glob_sum_2d_a |
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120 | |
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121 | |
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122 | FUNCTION glob_sum_3d_a( ptab1, ptab2 ) RESULT( glob_sum ) |
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123 | !!----------------------------------------------------------------------- |
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124 | !! *** FUNCTION glob_sum_3D_a *** |
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125 | !! |
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126 | !! ** Purpose : perform a masked sum on the inner global domain of two 3D array |
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127 | !!----------------------------------------------------------------------- |
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128 | !FTRANS ptab1 :I :I :z |
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129 | !FTRANS ptab2 :I :I :z |
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130 | REAL(wp), INTENT(in), DIMENSION(:,:,:) :: ptab1, ptab2 ! input 3D array |
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131 | REAL(wp) , DIMENSION(2) :: glob_sum ! global masked sum |
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132 | !! |
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133 | INTEGER :: jk |
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134 | #if defined key_z_first |
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135 | INTEGER :: ji, jj |
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136 | REAL(wp) :: ztmask |
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137 | #endif |
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138 | !!----------------------------------------------------------------------- |
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139 | ! |
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140 | glob_sum(:) = 0.e0 |
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141 | #if defined key_z_first |
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142 | DO jj = 1, jpj |
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143 | DO ji = 1, jpi |
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144 | ztmask = tmask_i(ji,jj) |
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145 | DO jk = 1, jpk |
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146 | glob_sum(1) = glob_sum(1) + ptab1(ji,jj,jk)*ztmask |
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147 | glob_sum(2) = glob_sum(2) + ptab2(ji,jj,jk)*ztmask |
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148 | END DO |
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149 | END DO |
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150 | END DO |
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151 | #else |
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152 | DO jk = 1, jpk |
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153 | glob_sum(1) = glob_sum(1) + SUM( ptab1(:,:,jk)*tmask_i(:,:) ) |
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154 | glob_sum(2) = glob_sum(2) + SUM( ptab2(:,:,jk)*tmask_i(:,:) ) |
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155 | END DO |
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156 | #endif |
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157 | IF( lk_mpp ) CALL mpp_sum( glob_sum, 2 ) |
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158 | ! |
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159 | END FUNCTION glob_sum_3d_a |
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160 | |
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161 | #else |
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162 | !!---------------------------------------------------------------------- |
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163 | !! 'key_mpp_rep' MPP reproducibility |
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164 | !!---------------------------------------------------------------------- |
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165 | |
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166 | FUNCTION glob_sum_2d( ptab ) RESULT( glob_sum ) |
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167 | !!---------------------------------------------------------------------- |
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168 | !! *** FUNCTION glob_sum_2d *** |
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169 | !! |
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170 | !! ** Purpose : perform a sum in calling DDPDD routine |
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171 | !!---------------------------------------------------------------------- |
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172 | REAL(wp), INTENT(in), DIMENSION(jpi,jpj) :: ptab |
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173 | REAL(wp) :: glob_sum ! global masked sum |
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174 | !! |
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175 | COMPLEX(wp):: ctmp |
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176 | REAL(wp) :: ztmp |
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177 | INTEGER :: ji, jj ! dummy loop indices |
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178 | !!----------------------------------------------------------------------- |
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179 | ! |
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180 | ztmp = 0.e0 |
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181 | ctmp = CMPLX( 0.e0, 0.e0, wp ) |
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182 | DO jj = 1, jpj |
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183 | DO ji =1, jpi |
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184 | ztmp = ptab(ji,jj) * tmask_i(ji,jj) |
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185 | CALL DDPDD( CMPLX( ztmp, 0.e0, wp ), ctmp ) |
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186 | END DO |
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187 | END DO |
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188 | IF( lk_mpp ) CALL mpp_sum( ctmp ) ! sum over the global domain |
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189 | glob_sum = REAL(ctmp,wp) |
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190 | ! |
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191 | END FUNCTION glob_sum_2d |
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192 | |
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193 | |
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194 | FUNCTION glob_sum_3d( ptab ) RESULT( glob_sum ) |
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195 | !!---------------------------------------------------------------------- |
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196 | !! *** FUNCTION glob_sum_3d *** |
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197 | !! |
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198 | !! ** Purpose : perform a sum on a 3D array in calling DDPDD routine |
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199 | !!---------------------------------------------------------------------- |
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200 | !FTRANS ptab :I :I :z |
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201 | REAL(wp), INTENT(in), DIMENSION(:,:,:) :: ptab |
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202 | REAL(wp) :: glob_sum ! global masked sum |
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203 | !! |
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204 | COMPLEX(wp):: ctmp |
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205 | REAL(wp) :: ztmp |
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206 | INTEGER :: ji, jj, jk ! dummy loop indices |
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207 | !!----------------------------------------------------------------------- |
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208 | ! |
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209 | ztmp = 0.e0 |
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210 | ctmp = CMPLX( 0.e0, 0.e0, wp ) |
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211 | #if defined key_z_first |
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212 | DO jj = 1, jpj |
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213 | DO ji =1, jpi |
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214 | DO jk = 1, jpk |
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215 | #else |
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216 | DO jk = 1, jpk |
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217 | DO jj = 1, jpj |
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218 | DO ji =1, jpi |
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219 | #endif |
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220 | ztmp = ptab(ji,jj,jk) * tmask_i(ji,jj) |
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221 | CALL DDPDD( CMPLX( ztmp, 0.e0, wp ), ctmp ) |
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222 | END DO |
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223 | END DO |
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224 | END DO |
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225 | IF( lk_mpp ) CALL mpp_sum( ctmp ) ! sum over the global domain |
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226 | glob_sum = REAL(ctmp,wp) |
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227 | ! |
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228 | END FUNCTION glob_sum_3d |
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229 | |
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230 | |
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231 | FUNCTION glob_sum_2d_a( ptab1, ptab2 ) RESULT( glob_sum ) |
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232 | !!---------------------------------------------------------------------- |
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233 | !! *** FUNCTION glob_sum_2d_a *** |
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234 | !! |
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235 | !! ** Purpose : perform a sum on two 2D arrays in calling DDPDD routine |
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236 | !!---------------------------------------------------------------------- |
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237 | REAL(wp), INTENT(in), DIMENSION(jpi,jpj) :: ptab1, ptab2 |
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238 | REAL(wp) :: glob_sum ! global masked sum |
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239 | !! |
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240 | COMPLEX(wp):: ctmp |
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241 | REAL(wp) :: ztmp |
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242 | INTEGER :: ji, jj ! dummy loop indices |
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243 | !!----------------------------------------------------------------------- |
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244 | ! |
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245 | ztmp = 0.e0 |
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246 | ctmp = CMPLX( 0.e0, 0.e0, wp ) |
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247 | DO jj = 1, jpj |
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248 | DO ji =1, jpi |
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249 | ztmp = ptab1(ji,jj) * tmask_i(ji,jj) |
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250 | CALL DDPDD( CMPLX( ztmp, 0.e0, wp ), ctmp ) |
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251 | ztmp = ptab2(ji,jj) * tmask_i(ji,jj) |
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252 | CALL DDPDD( CMPLX( ztmp, 0.e0, wp ), ctmp ) |
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253 | END DO |
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254 | END DO |
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255 | IF( lk_mpp ) CALL mpp_sum( ctmp ) ! sum over the global domain |
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256 | glob_sum = REAL(ctmp,wp) |
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257 | ! |
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258 | END FUNCTION glob_sum_2d_a |
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259 | |
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260 | |
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261 | FUNCTION glob_sum_3d_a( ptab1, ptab2 ) RESULT( glob_sum ) |
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262 | !!---------------------------------------------------------------------- |
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263 | !! *** FUNCTION glob_sum_3d_a *** |
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264 | !! |
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265 | !! ** Purpose : perform a sum on two 3D array in calling DDPDD routine |
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266 | !!---------------------------------------------------------------------- |
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267 | REAL(wp), INTENT(in), DIMENSION(:,:,:) :: ptab1, ptab2 |
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268 | !FTRANS ptab1 :I :I :z |
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269 | !FTRANS ptab2 :I :I :z |
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270 | REAL(wp) :: glob_sum ! global masked sum |
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271 | !! |
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272 | COMPLEX(wp):: ctmp |
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273 | REAL(wp) :: ztmp |
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274 | INTEGER :: ji, jj, jk ! dummy loop indices |
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275 | !!----------------------------------------------------------------------- |
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276 | ! |
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277 | ztmp = 0.e0 |
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278 | ctmp = CMPLX( 0.e0, 0.e0, wp ) |
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279 | #if defined key_z_first |
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280 | DO jj = 1, jpj |
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281 | DO ji =1, jpi |
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282 | DO jk = 1, jpk |
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283 | #else |
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284 | DO jk = 1, jpk |
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285 | DO jj = 1, jpj |
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286 | DO ji =1, jpi |
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287 | #endif |
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288 | ztmp = ptab1(ji,jj,jk) * tmask_i(ji,jj) |
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289 | CALL DDPDD( CMPLX( ztmp, 0.e0, wp ), ctmp ) |
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290 | ztmp = ptab2(ji,jj,jk) * tmask_i(ji,jj) |
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291 | CALL DDPDD( CMPLX( ztmp, 0.e0, wp ), ctmp ) |
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292 | END DO |
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293 | END DO |
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294 | END DO |
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295 | IF( lk_mpp ) CALL mpp_sum( ctmp ) ! sum over the global domain |
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296 | glob_sum = REAL(ctmp,wp) |
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297 | ! |
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298 | END FUNCTION glob_sum_3d_a |
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299 | |
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300 | |
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301 | SUBROUTINE DDPDD( ydda, yddb ) |
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302 | !!---------------------------------------------------------------------- |
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303 | !! *** ROUTINE DDPDD *** |
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304 | !! |
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305 | !! ** Purpose : Add a scalar element to a sum |
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306 | !! |
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307 | !! |
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308 | !! ** Method : The code uses the compensated summation with doublet |
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309 | !! (sum,error) emulated useing complex numbers. ydda is the |
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310 | !! scalar to add to the summ yddb |
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311 | !! |
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312 | !! ** Action : This does only work for MPI. |
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313 | !! |
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314 | !! References : Using Acurate Arithmetics to Improve Numerical |
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315 | !! Reproducibility and Sability in Parallel Applications |
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316 | !! Yun HE and Chris H. Q. DING, Journal of Supercomputing 18, 259-277, 2001 |
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317 | !!---------------------------------------------------------------------- |
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318 | COMPLEX(wp), INTENT(in ) :: ydda |
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319 | COMPLEX(wp), INTENT(inout) :: yddb |
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320 | ! |
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321 | REAL(wp) :: zerr, zt1, zt2 ! local work variables |
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322 | !!----------------------------------------------------------------------- |
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323 | ! |
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324 | ! Compute ydda + yddb using Knuth's trick. |
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325 | zt1 = REAL(ydda) + REAL(yddb) |
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326 | zerr = zt1 - REAL(ydda) |
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327 | zt2 = ( (REAL(yddb) - zerr) + (REAL(ydda) - (zt1 - zerr)) ) & |
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328 | & + AIMAG(ydda) + AIMAG(yddb) |
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329 | ! |
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330 | ! The result is t1 + t2, after normalization. |
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331 | yddb = CMPLX( zt1 + zt2, zt2 - ((zt1 + zt2) - zt1), wp ) |
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332 | ! |
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333 | END SUBROUTINE DDPDD |
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334 | #endif |
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335 | |
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336 | #if defined key_nosignedzero |
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337 | !!---------------------------------------------------------------------- |
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338 | !! 'key_nosignedzero' F90 SIGN |
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339 | !!---------------------------------------------------------------------- |
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340 | |
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341 | FUNCTION SIGN_SCALAR( pa, pb ) |
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342 | !!----------------------------------------------------------------------- |
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343 | !! *** FUNCTION SIGN_SCALAR *** |
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344 | !! |
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345 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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346 | !!----------------------------------------------------------------------- |
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347 | REAL(wp) :: pa,pb ! input |
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348 | REAL(wp) :: SIGN_SCALAR ! result |
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349 | !!----------------------------------------------------------------------- |
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350 | IF ( pb >= 0.e0) THEN ; SIGN_SCALAR = ABS(pa) |
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351 | ELSE ; SIGN_SCALAR =-ABS(pa) |
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352 | ENDIF |
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353 | END FUNCTION SIGN_SCALAR |
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354 | |
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355 | |
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356 | FUNCTION SIGN_ARRAY_1D( pa, pb ) |
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357 | !!----------------------------------------------------------------------- |
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358 | !! *** FUNCTION SIGN_ARRAY_1D *** |
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359 | !! |
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360 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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361 | !!----------------------------------------------------------------------- |
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362 | REAL(wp) :: pa,pb(:) ! input |
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363 | REAL(wp) :: SIGN_ARRAY_1D(SIZE(pb,1)) ! result |
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364 | !!----------------------------------------------------------------------- |
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365 | WHERE ( pb >= 0.e0 ) ; SIGN_ARRAY_1D = ABS(pa) |
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366 | ELSEWHERE ; SIGN_ARRAY_1D =-ABS(pa) |
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367 | END WHERE |
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368 | END FUNCTION SIGN_ARRAY_1D |
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369 | |
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370 | |
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371 | FUNCTION SIGN_ARRAY_2D(pa,pb) |
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372 | !!----------------------------------------------------------------------- |
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373 | !! *** FUNCTION SIGN_ARRAY_2D *** |
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374 | !! |
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375 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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376 | !!----------------------------------------------------------------------- |
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377 | REAL(wp) :: pa,pb(:,:) ! input |
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378 | REAL(wp) :: SIGN_ARRAY_2D(SIZE(pb,1),SIZE(pb,2)) ! result |
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379 | !!----------------------------------------------------------------------- |
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380 | WHERE ( pb >= 0.e0 ) ; SIGN_ARRAY_2D = ABS(pa) |
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381 | ELSEWHERE ; SIGN_ARRAY_2D =-ABS(pa) |
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382 | END WHERE |
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383 | END FUNCTION SIGN_ARRAY_2D |
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384 | |
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385 | FUNCTION SIGN_ARRAY_3D(pa,pb) |
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386 | !!----------------------------------------------------------------------- |
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387 | !! *** FUNCTION SIGN_ARRAY_3D *** |
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388 | !! |
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389 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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390 | !!----------------------------------------------------------------------- |
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391 | REAL(wp) :: pa,pb(:,:,:) ! input |
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392 | REAL(wp) :: SIGN_ARRAY_3D(SIZE(pb,1),SIZE(pb,2),SIZE(pb,3)) ! result |
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393 | !!----------------------------------------------------------------------- |
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394 | WHERE ( pb >= 0.e0 ) ; SIGN_ARRAY_3D = ABS(pa) |
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395 | ELSEWHERE ; SIGN_ARRAY_3D =-ABS(pa) |
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396 | END WHERE |
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397 | END FUNCTION SIGN_ARRAY_3D |
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398 | |
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399 | |
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400 | FUNCTION SIGN_ARRAY_1D_A(pa,pb) |
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401 | !!----------------------------------------------------------------------- |
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402 | !! *** FUNCTION SIGN_ARRAY_1D_A *** |
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403 | !! |
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404 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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405 | !!----------------------------------------------------------------------- |
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406 | REAL(wp) :: pa(:),pb(:) ! input |
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407 | REAL(wp) :: SIGN_ARRAY_1D_A(SIZE(pb,1)) ! result |
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408 | !!----------------------------------------------------------------------- |
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409 | WHERE ( pb >= 0.e0 ) ; SIGN_ARRAY_1D_A = ABS(pa) |
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410 | ELSEWHERE ; SIGN_ARRAY_1D_A =-ABS(pa) |
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411 | END WHERE |
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412 | END FUNCTION SIGN_ARRAY_1D_A |
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413 | |
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414 | |
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415 | FUNCTION SIGN_ARRAY_2D_A(pa,pb) |
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416 | !!----------------------------------------------------------------------- |
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417 | !! *** FUNCTION SIGN_ARRAY_2D_A *** |
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418 | !! |
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419 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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420 | !!----------------------------------------------------------------------- |
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421 | REAL(wp) :: pa(:,:),pb(:,:) ! input |
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422 | REAL(wp) :: SIGN_ARRAY_2D_A(SIZE(pb,1),SIZE(pb,2)) ! result |
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423 | !!----------------------------------------------------------------------- |
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424 | WHERE ( pb >= 0.e0 ) ; SIGN_ARRAY_2D_A = ABS(pa) |
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425 | ELSEWHERE ; SIGN_ARRAY_2D_A =-ABS(pa) |
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426 | END WHERE |
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427 | END FUNCTION SIGN_ARRAY_2D_A |
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428 | |
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429 | |
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430 | FUNCTION SIGN_ARRAY_3D_A(pa,pb) |
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431 | !!----------------------------------------------------------------------- |
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432 | !! *** FUNCTION SIGN_ARRAY_3D_A *** |
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433 | !! |
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434 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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435 | !!----------------------------------------------------------------------- |
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436 | REAL(wp) :: pa(:,:,:),pb(:,:,:) ! input |
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437 | REAL(wp) :: SIGN_ARRAY_3D_A(SIZE(pb,1),SIZE(pb,2),SIZE(pb,3)) ! result |
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438 | !!----------------------------------------------------------------------- |
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439 | WHERE ( pb >= 0.e0 ) ; SIGN_ARRAY_3D_A = ABS(pa) |
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440 | ELSEWHERE ; SIGN_ARRAY_3D_A =-ABS(pa) |
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441 | END WHERE |
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442 | END FUNCTION SIGN_ARRAY_3D_A |
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443 | |
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444 | |
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445 | FUNCTION SIGN_ARRAY_1D_B(pa,pb) |
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446 | !!----------------------------------------------------------------------- |
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447 | !! *** FUNCTION SIGN_ARRAY_1D_B *** |
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448 | !! |
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449 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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450 | !!----------------------------------------------------------------------- |
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451 | REAL(wp) :: pa(:),pb ! input |
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452 | REAL(wp) :: SIGN_ARRAY_1D_B(SIZE(pa,1)) ! result |
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453 | !!----------------------------------------------------------------------- |
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454 | IF( pb >= 0.e0 ) THEN ; SIGN_ARRAY_1D_B = ABS(pa) |
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455 | ELSE ; SIGN_ARRAY_1D_B =-ABS(pa) |
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456 | ENDIF |
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457 | END FUNCTION SIGN_ARRAY_1D_B |
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458 | |
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459 | |
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460 | FUNCTION SIGN_ARRAY_2D_B(pa,pb) |
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461 | !!----------------------------------------------------------------------- |
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462 | !! *** FUNCTION SIGN_ARRAY_2D_B *** |
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463 | !! |
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464 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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465 | !!----------------------------------------------------------------------- |
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466 | REAL(wp) :: pa(:,:),pb ! input |
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467 | REAL(wp) :: SIGN_ARRAY_2D_B(SIZE(pa,1),SIZE(pa,2)) ! result |
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468 | !!----------------------------------------------------------------------- |
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469 | IF( pb >= 0.e0 ) THEN ; SIGN_ARRAY_2D_B = ABS(pa) |
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470 | ELSE ; SIGN_ARRAY_2D_B =-ABS(pa) |
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471 | ENDIF |
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472 | END FUNCTION SIGN_ARRAY_2D_B |
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473 | |
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474 | |
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475 | FUNCTION SIGN_ARRAY_3D_B(pa,pb) |
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476 | !!----------------------------------------------------------------------- |
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477 | !! *** FUNCTION SIGN_ARRAY_3D_B *** |
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478 | !! |
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479 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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480 | !!----------------------------------------------------------------------- |
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481 | REAL(wp) :: pa(:,:,:),pb ! input |
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482 | REAL(wp) :: SIGN_ARRAY_3D_B(SIZE(pa,1),SIZE(pa,2),SIZE(pa,3)) ! result |
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483 | !!----------------------------------------------------------------------- |
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484 | IF( pb >= 0.e0 ) THEN ; SIGN_ARRAY_3D_B = ABS(pa) |
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485 | ELSE ; SIGN_ARRAY_3D_B =-ABS(pa) |
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486 | ENDIF |
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487 | END FUNCTION SIGN_ARRAY_3D_B |
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488 | #endif |
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489 | |
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490 | !!====================================================================== |
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491 | END MODULE lib_fortran |
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