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 Michael Dunphy, Rachid BENSHILA Original code |
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7 | !!---------------------------------------------------------------------- |
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8 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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9 | !! $Id$ |
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10 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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11 | !!---------------------------------------------------------------------- |
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12 | USE par_oce |
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13 | USE par_kind |
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14 | USE lib_mpp ! distributed memory computing |
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15 | USE dom_oce |
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16 | USE in_out_manager |
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17 | |
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18 | IMPLICIT NONE |
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19 | PRIVATE |
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20 | |
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21 | PUBLIC glob_sum |
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22 | #if defined key_nosignedzeo |
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23 | PUBLIC SIGN |
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24 | #endif |
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25 | |
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26 | INTERFACE glob_sum |
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27 | #if defined key_mpp_rep |
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28 | MODULE PROCEDURE mpp_sum_cmpx |
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29 | #else |
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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 | #endif |
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32 | END INTERFACE |
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33 | |
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34 | #if defined key_nosignedzeo |
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35 | INTERFACE SIGN |
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36 | MODULE PROCEDURE SIGN_SCALAR, SIGN_ARRAY_1D, SIGN_ARRAY_2D, SIGN_ARRAY_3D, & |
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37 | SIGN_ARRAY_1D_A, SIGN_ARRAY_2D_A, SIGN_ARRAY_3D_A, & |
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38 | SIGN_ARRAY_1D_B, SIGN_ARRAY_2D_B, SIGN_ARRAY_3D_B |
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39 | END INTERFACE |
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40 | #endif |
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41 | |
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42 | CONTAINS |
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43 | |
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44 | FUNCTION glob_sum_2d( ptab ) |
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45 | !!----------------------------------------------------------------------- |
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46 | !! *** FUNCTION glob_sum_2D *** |
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47 | !! |
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48 | !! ** Purpose : perform a sum on the global domain of a 2D array |
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49 | !!----------------------------------------------------------------------- |
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50 | REAL(wp), DIMENSION(:,:),INTENT(in) :: ptab |
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51 | REAL(wp) :: glob_sum_2d |
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52 | !!----------------------------------------------------------------------- |
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53 | |
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54 | glob_sum_2d = SUM( ptab(:,:)*tmask_i(:,:) ) |
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55 | IF( lk_mpp ) CALL mpp_sum( glob_sum_2d ) |
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56 | |
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57 | END FUNCTION glob_sum_2d |
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58 | |
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59 | FUNCTION glob_sum_3d( ptab ) |
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60 | !!----------------------------------------------------------------------- |
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61 | !! *** FUNCTION glob_sum_3D *** |
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62 | !! |
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63 | !! ** Purpose : perform a sum on the global domain of a 3D array |
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64 | !!----------------------------------------------------------------------- |
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65 | REAL(wp), DIMENSION(:,:,:) :: ptab |
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66 | REAL(wp) :: glob_sum_3d |
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67 | ! |
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68 | INTEGER :: jk |
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69 | !!----------------------------------------------------------------------- |
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70 | |
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71 | GLOB_SUM_3D = 0.e0 |
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72 | DO jk = 1, jpk |
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73 | glob_sum_3d = glob_sum_3d + SUM( ptab(:,:,jk)*tmask_i(:,:) ) |
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74 | END DO |
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75 | IF( lk_mpp ) CALL mpp_sum( glob_sum_3d ) |
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76 | |
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77 | END FUNCTION glob_sum_3d |
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78 | |
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79 | FUNCTION glob_sum_2d_a( ptab1, ptab2 ) |
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80 | !!----------------------------------------------------------------------- |
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81 | !! *** FUNCTION glob_sum_2D _a *** |
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82 | !! |
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83 | !! ** Purpose : perform a sum on the global domain of two 2D array |
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84 | !!----------------------------------------------------------------------- |
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85 | REAL(wp), DIMENSION(:,:) :: ptab1, ptab2 |
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86 | REAL(wp), DIMENSION(2) :: glob_sum_2d_a |
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87 | !!----------------------------------------------------------------------- |
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88 | |
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89 | glob_sum_2d_a(1) = SUM( ptab1(:,:)*tmask_i(:,:) ) |
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90 | glob_sum_2d_a(2) = SUM( ptab2(:,:)*tmask_i(:,:) ) |
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91 | IF( lk_mpp ) CALL mpp_sum( glob_sum_2d_a,2 ) |
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92 | |
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93 | END FUNCTION glob_sum_2d_a |
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94 | |
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95 | FUNCTION glob_sum_3d_a( ptab1, ptab2 ) |
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96 | !!----------------------------------------------------------------------- |
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97 | !! *** FUNCTION glob_sum_3D_a *** |
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98 | !! |
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99 | !! ** Purpose : perform a sum on the global domain of two 3D array |
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100 | !!----------------------------------------------------------------------- |
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101 | REAL(wp), DIMENSION(:,:,:) :: ptab1, ptab2 |
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102 | REAL(wp), DIMENSION(2) :: glob_sum_3d_a |
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103 | ! |
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104 | INTEGER :: jk |
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105 | !!----------------------------------------------------------------------- |
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106 | |
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107 | glob_sum_3d_a(:) = 0.e0 |
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108 | DO jk = 1, jpk |
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109 | glob_sum_3d_a(1) = glob_sum_3d_a(1) + SUM( ptab1(:,:,jk)*tmask_i(:,:) ) |
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110 | glob_sum_3d_a(2) = glob_sum_3d_a(2) + SUM( ptab2(:,:,jk)*tmask_i(:,:) ) |
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111 | END DO |
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112 | IF( lk_mpp ) CALL mpp_sum( glob_sum_3d_a,2 ) |
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113 | |
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114 | END FUNCTION glob_sum_3d_a |
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115 | |
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116 | #if defined key_mpp_rep |
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117 | FUNCTION mpp_sum_cmpx( pval ) |
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118 | !!---------------------------------------------------------------------- |
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119 | !! *** FUNCTION mpp_sum_cmpx *** |
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120 | !! |
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121 | !! ** Purpose : perform a sum in calling DDPDD routine |
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122 | !! |
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123 | !!---------------------------------------------------------------------- |
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124 | REAL(wp) :: mpp_sum_cmpx |
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125 | ! |
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126 | REAL(wp), DIMENSION(jpi,jpj), INTENT(IN) :: & |
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127 | & pval |
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128 | COMPLEX(wp):: ctmp |
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129 | REAL(wp) ::ztmp |
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130 | INTEGER :: ji,jj |
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131 | !!----------------------------------------------------------------------- |
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132 | |
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133 | ztmp = 0.e0 |
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134 | ctmp = CMPLX(0.e0,0.e0,wp) |
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135 | DO jj = 1,jpj |
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136 | DO ji =1, jpi |
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137 | ztmp = pval(ji,jj) * tmask_i(ji,jj) |
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138 | CALL DDPDD(CMPLX(ztmp,0.e0,wp),ctmp) |
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139 | END DO |
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140 | END DO |
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141 | IF( lk_mpp ) CALL mpp_sum( ctmp ) ! sum over the global domain |
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142 | mpp_sum_cmpx= REAL(ctmp,wp) |
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143 | |
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144 | END FUNCTION mpp_sum_cmpx |
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145 | |
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146 | SUBROUTINE DDPDD( ydda, yddb ) |
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147 | !!---------------------------------------------------------------------- |
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148 | !! *** ROUTINE DDPDD *** |
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149 | !! |
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150 | !! ** Purpose : Add a scalar element to a sum |
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151 | !! |
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152 | !! |
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153 | !! ** Method : The code uses the compensated summation with doublet |
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154 | !! (sum,error) emulated useing complex numbers. ydda is the |
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155 | !! scalar to add to the summ yddb |
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156 | !! |
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157 | !! ** Action : This does only work for MPI. |
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158 | !! |
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159 | !! References : Using Acurate Arithmetics to Improve Numerical |
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160 | !! Reproducibility and Sability in Parallel Applications |
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161 | !! Yun HE and Chris H. Q. DING, Journal of Supercomputing |
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162 | !! 18, 259-277, 2001 |
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163 | !!---------------------------------------------------------------------- |
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164 | |
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165 | COMPLEX(wp), INTENT(in) :: ydda |
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166 | COMPLEX(wp), INTENT(inout) :: yddb |
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167 | |
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168 | REAL(wp) :: zerr, zt1, zt2 ! local work variables |
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169 | |
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170 | ! Compute ydda + yddb using Knuth's trick. |
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171 | zt1 = real(ydda) + real(yddb) |
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172 | zerr = zt1 - real(ydda) |
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173 | zt2 = ((real(yddb) - zerr) + (real(ydda) - (zt1 - zerr))) & |
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174 | + aimag(ydda) + aimag(yddb) |
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175 | |
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176 | ! The result is t1 + t2, after normalization. |
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177 | yddb = cmplx ( zt1 + zt2, zt2 - ((zt1 + zt2) - zt1),wp ) |
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178 | |
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179 | END SUBROUTINE DDPDD |
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180 | #endif |
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181 | |
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182 | #if defined key_nosignedzero |
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183 | FUNCTION SIGN_SCALAR(pa,pb) |
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184 | !!----------------------------------------------------------------------- |
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185 | !! *** FUNCTION SIGN_SCALAR *** |
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186 | !! |
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187 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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188 | !!----------------------------------------------------------------------- |
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189 | REAL(wp) :: pa,pb ! input |
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190 | REAL(wp) :: SIGN_SCALAR ! result |
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191 | IF ( pb >= 0.e0) THEN |
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192 | SIGN_SCALAR = ABS(pa) |
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193 | ELSE |
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194 | SIGN_SCALAR =-ABS(pa) |
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195 | ENDIF |
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196 | |
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197 | END FUNCTION SIGN_SCALAR |
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198 | |
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199 | FUNCTION SIGN_ARRAY_1D(pa,pb) |
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200 | !!----------------------------------------------------------------------- |
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201 | !! *** FUNCTION SIGN_ARRAY_1D *** |
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202 | !! |
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203 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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204 | !!----------------------------------------------------------------------- |
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205 | REAL(wp) :: pa,pb(:) ! input |
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206 | REAL(wp) :: SIGN_ARRAY_1D(SIZE(pb,1)) ! result |
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207 | WHERE ( pb >= 0.e0 ) |
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208 | SIGN_ARRAY_1D = ABS(pa) |
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209 | ELSEWHERE |
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210 | SIGN_ARRAY_1D =-ABS(pa) |
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211 | END WHERE |
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212 | |
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213 | END FUNCTION SIGN_ARRAY_1D |
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214 | |
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215 | FUNCTION SIGN_ARRAY_2D(pa,pb) |
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216 | !!----------------------------------------------------------------------- |
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217 | !! *** FUNCTION SIGN_ARRAY_2D *** |
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218 | !! |
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219 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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220 | !!----------------------------------------------------------------------- |
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221 | REAL(wp) :: pa,pb(:,:) ! input |
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222 | REAL(wp) :: SIGN_ARRAY_2D(SIZE(pb,1),SIZE(pb,2)) ! result |
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223 | |
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224 | WHERE ( pb >= 0.e0 ) |
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225 | SIGN_ARRAY_2D = ABS(pa) |
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226 | ELSEWHERE |
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227 | SIGN_ARRAY_2D =-ABS(pa) |
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228 | END WHERE |
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229 | |
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230 | END FUNCTION SIGN_ARRAY_2D |
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231 | |
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232 | FUNCTION SIGN_ARRAY_3D(pa,pb) |
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233 | !!----------------------------------------------------------------------- |
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234 | !! *** FUNCTION SIGN_ARRAY_3D *** |
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235 | !! |
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236 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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237 | !!----------------------------------------------------------------------- |
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238 | REAL(wp) :: pa,pb(:,:,:) ! input |
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239 | REAL(wp) :: SIGN_ARRAY_3D(SIZE(pb,1),SIZE(pb,2),SIZE(pb,3)) ! result |
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240 | WHERE ( pb >= 0.e0 ) |
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241 | SIGN_ARRAY_3D = ABS(pa) |
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242 | ELSEWHERE |
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243 | SIGN_ARRAY_3D =-ABS(pa) |
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244 | END WHERE |
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245 | |
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246 | END FUNCTION SIGN_ARRAY_3D |
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247 | |
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248 | FUNCTION SIGN_ARRAY_1D_A(pa,pb) |
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249 | !!----------------------------------------------------------------------- |
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250 | !! *** FUNCTION SIGN_ARRAY_1D_A *** |
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251 | !! |
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252 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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253 | !!----------------------------------------------------------------------- |
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254 | REAL(wp) :: pa(:),pb(:) ! input |
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255 | REAL(wp) :: SIGN_ARRAY_1D_A(SIZE(b,1)) ! result |
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256 | |
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257 | WHERE ( pb >= 0.e0 ) |
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258 | SIGN_ARRAY_1D_A = ABS(pa) |
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259 | ELSEWHERE |
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260 | SIGN_ARRAY_1D_A =-ABS(pa) |
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261 | END WHERE |
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262 | |
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263 | END FUNCTION SIGN_ARRAY_1D_A |
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264 | |
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265 | FUNCTION SIGN_ARRAY_2D_A(pa,pb) |
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266 | !!----------------------------------------------------------------------- |
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267 | !! *** FUNCTION SIGN_ARRAY_2D_A *** |
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268 | !! |
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269 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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270 | !!----------------------------------------------------------------------- |
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271 | REAL(wp) :: pa(:,:),pb(:,:) ! input |
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272 | REAL(wp) :: SIGN_ARRAY_2D_A(SIZE(pb,1),SIZE(pb,2)) ! result |
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273 | |
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274 | WHERE ( pb >= 0.e0 ) |
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275 | SIGN_ARRAY_2D_A = ABS(pa) |
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276 | ELSEWHERE |
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277 | SIGN_ARRAY_2D_A =-ABS(pa) |
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278 | END WHERE |
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279 | |
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280 | END FUNCTION SIGN_ARRAY_2D_A |
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281 | |
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282 | FUNCTION SIGN_ARRAY_3D_A(pa,pb) |
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283 | !!----------------------------------------------------------------------- |
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284 | !! *** FUNCTION SIGN_ARRAY_3D_A *** |
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285 | !! |
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286 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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287 | !!----------------------------------------------------------------------- |
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288 | REAL(wp) :: pa(:,:,:),pb(:,:,:) ! input |
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289 | REAL(wp) :: SIGN_ARRAY_3D_A(SIZE(pb,1),SIZE(pb,2),SIZE(pb,3)) ! result |
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290 | |
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291 | WHERE ( pb >= 0.e0 ) |
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292 | SIGN_ARRAY_3D_A = ABS(pa) |
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293 | ELSEWHERE |
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294 | SIGN_ARRAY_3D_A =-ABS(pa) |
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295 | END WHERE |
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296 | |
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297 | END FUNCTION SIGN_ARRAY_3D_A |
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298 | |
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299 | FUNCTION SIGN_ARRAY_1D_B(pa,pb) |
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300 | !!----------------------------------------------------------------------- |
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301 | !! *** FUNCTION SIGN_ARRAY_1D_B *** |
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302 | !! |
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303 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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304 | !!----------------------------------------------------------------------- |
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305 | REAL(wp) :: pa(:),pb ! input |
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306 | REAL(wp) :: SIGN_ARRAY_1D_B(SIZE(pa,1)) ! result |
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307 | |
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308 | IF ( pb >= 0.e0 ) THEN |
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309 | SIGN_ARRAY_1D_B = ABS(pa) |
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310 | ELSE |
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311 | SIGN_ARRAY_1D_B =-ABS(pa) |
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312 | ENDIF |
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313 | |
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314 | END FUNCTION SIGN_ARRAY_1D_B |
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315 | |
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316 | FUNCTION SIGN_ARRAY_2D_B(pa,pb) |
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317 | !!----------------------------------------------------------------------- |
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318 | !! *** FUNCTION SIGN_ARRAY_2D_B *** |
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319 | !! |
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320 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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321 | !!----------------------------------------------------------------------- |
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322 | REAL(wp) :: pa(:,:),pb ! input |
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323 | REAL(wp) :: SIGN_ARRAY_2D_B(SIZE(pa,1),SIZE(pa,2)) ! result |
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324 | |
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325 | IF ( pb >= 0.e0 ) THEN |
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326 | SIGN_ARRAY_2D_B = ABS(pa) |
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327 | ELSE |
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328 | SIGN_ARRAY_2D_B =-ABS(pa) |
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329 | ENDIF |
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330 | |
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331 | END FUNCTION SIGN_ARRAY_2D_B |
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332 | |
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333 | FUNCTION SIGN_ARRAY_3D_B(pa,pb) |
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334 | !!----------------------------------------------------------------------- |
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335 | !! *** FUNCTION SIGN_ARRAY_3D_B *** |
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336 | !! |
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337 | !! ** Purpose : overwrite f95 behaviour of intrinsinc sign function |
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338 | !!----------------------------------------------------------------------- |
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339 | REAL(wp) :: pa(:,:,:),pb ! input |
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340 | REAL(wp) :: SIGN_ARRAY_3D_B(SIZE(pa,1),SIZE(pa,2),SIZE(pa,3)) ! result |
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341 | |
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342 | IF (pb >= 0.e0 ) THEN |
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343 | SIGN_ARRAY_3D_B = ABS(pa) |
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344 | ELSE |
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345 | SIGN_ARRAY_3D_B =-ABS(pa) |
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346 | ENDIF |
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347 | |
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348 | END FUNCTION SIGN_ARRAY_3D_B |
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349 | #endif |
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350 | |
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351 | END MODULE lib_fortran |
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