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C $Header: /u/gcmpack/MITgcm/model/src/solve_tridiagonal.F,v 1.10 2012/03/15 15:25:18 jmc Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: SOLVE_UV_TRIDIAGO |
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C !INTERFACE: |
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SUBROUTINE SOLVE_UV_TRIDIAGO( |
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I kSize, ols, solve4u, solve4v, |
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I aU, bU, cU, rhsU, |
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I aV, bV, cV, rhsV, |
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O uFld, vFld, |
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O errCode, |
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I subIter, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R SOLVE_UV_TRIDIAGO |
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C | o Solve a pair of tri-diagonal system along X and Y lines |
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C | (in X-dir for uFld and in Y-dir for vFld) |
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C *==========================================================* |
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C | o Used, e.g., in linear part of seaice LSR solver |
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C *==========================================================* |
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C \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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C == Global data == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
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C kSize :: size in 3rd dimension |
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C ols :: size of overlap (of input arg array) |
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C solve4u :: logical flag, do solve for u-component if true |
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C solve4v :: logical flag, do solve for v-component if true |
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C aU,bU,cU :: u-matrix (lower diagonal, main diagonal & upper diagonal) |
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C rhsU :: RHS vector (u-component) |
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C aV,bV,cV :: v-matrix (lower diagonal, main diagonal & upper diagonal) |
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C rhsV :: RHS vector (v-component) |
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C uFld :: X = solution of: A_u * X = rhsU |
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C vFld :: X = solution of: A_v * X = rhsV |
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C errCode :: > 0 if singular matrix |
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C subIter :: current sub-iteration number |
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C myIter :: current iteration number |
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C myThid :: my Thread Id number |
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INTEGER kSize, ols |
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LOGICAL solve4u, solve4v |
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_RL aU (1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL bU (1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL cU (1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL rhsU(1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL aV (1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL bV (1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL cV (1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL rhsV(1-ols:sNx+ols,1-ols:sNy+ols,kSize,nSx,nSy) |
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_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
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_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
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INTEGER errCode |
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INTEGER subIter, myIter, myThid |
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|
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C !SHARED LOCAL VARIABLES: |
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C aTu, cTu, yTu :: tile edges coeff and RHS for u-component |
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C aTv, cTv, yTv :: tile edges coeff and RHS for v-component |
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COMMON /SOLVE_UV_3DIAG_LOCAL/ |
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& aTu, cTu, yTu, aTv, cTv, yTv |
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_RL aTu(2,1:sNy,nSx,nSy) |
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_RL cTu(2,1:sNy,nSx,nSy) |
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_RL yTu(2,1:sNy,nSx,nSy) |
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_RL aTv(2,1:sNx,nSx,nSy) |
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_RL cTv(2,1:sNx,nSx,nSy) |
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_RL yTv(2,1:sNx,nSx,nSy) |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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INTEGER bi, bj, bm, bp |
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INTEGER i,j,k |
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INTEGER ii, im, ip |
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INTEGER jj, jm, jp |
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_RL tmpVar |
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_RL uTmp1, uTmp2, vTmp1, vTmp2 |
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_RL alpU(1:sNx,1:sNy,nSx,nSy) |
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_RL gamU(1:sNx,1:sNy,nSx,nSy) |
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_RL yy_U(1:sNx,1:sNy,nSx,nSy) |
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_RL alpV(1:sNx,1:sNy,nSx,nSy) |
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_RL gamV(1:sNx,1:sNy,nSx,nSy) |
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_RL yy_V(1:sNx,1:sNy,nSx,nSy) |
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CEOP |
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|
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errCode = 0 |
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IF ( .NOT.solve4u .AND. .NOT.solve4v ) RETURN |
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|
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C-- outside loop on level number k |
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DO k = 1,kSize |
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|
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IF ( solve4u ) THEN |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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|
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C-- work on local copy: |
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DO j= 1,sNy |
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DO i= 1,sNx |
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alpU(i,j,bi,bj) = aU(i,j,k,bi,bj) |
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gamU(i,j,bi,bj) = cU(i,j,k,bi,bj) |
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yy_U(i,j,bi,bj) = rhsU(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- Beginning of forward sweep (i=1) |
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i = 1 |
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DO j= 1,sNy |
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C- normalise row [1] ( 1 on main diagonal) |
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tmpVar = bU(i,j,k,bi,bj) |
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IF ( tmpVar.NE.0. _d 0 ) THEN |
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tmpVar = 1. _d 0 / tmpVar |
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ELSE |
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tmpVar = 0. _d 0 |
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errCode = 1 |
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ENDIF |
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gamU(i,j,bi,bj) = gamU(i,j,bi,bj)*tmpVar |
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alpU(i,j,bi,bj) = alpU(i,j,bi,bj)*tmpVar |
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yy_U(i,j,bi,bj) = yy_U(i,j,bi,bj)*tmpVar |
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ENDDO |
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|
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C-- Middle of forward sweep (i=2:sNx) |
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DO j= 1,sNy |
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DO i= 2,sNx |
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im = i-1 |
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C- update row [i] <-- [i] - alp_i * [i-1] and normalise (main diagonal = 1) |
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tmpVar = bU(i,j,k,bi,bj) - alpU(i,j,bi,bj)*gamU(im,j,bi,bj) |
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IF ( tmpVar.NE.0. _d 0 ) THEN |
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tmpVar = 1. _d 0 / tmpVar |
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ELSE |
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tmpVar = 0. _d 0 |
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errCode = 1 |
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ENDIF |
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yy_U(i,j,bi,bj) = ( yy_U(i,j,bi,bj) |
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& - alpU(i,j,bi,bj)*yy_U(im,j,bi,bj) |
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& )*tmpVar |
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gamU(i,j,bi,bj) = gamU(i,j,bi,bj)*tmpVar |
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alpU(i,j,bi,bj) = - alpU(i,j,bi,bj)*alpU(im,j,bi,bj)*tmpVar |
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ENDDO |
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ENDDO |
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|
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C-- Backward sweep (i=sNx-1:-1:1) |
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DO j= 1,sNy |
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DO ii= 1,sNx-1 |
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i = sNx - ii |
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ip = i+1 |
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C- update row [i] <-- [i] - gam_i * [i+1] |
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yy_U(i,j,bi,bj) = yy_U(i,j,bi,bj) |
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& - gamU(i,j,bi,bj)*yy_U(ip,j,bi,bj) |
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alpU(i,j,bi,bj) = alpU(i,j,bi,bj) |
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& - gamU(i,j,bi,bj)*alpU(ip,j,bi,bj) |
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gamU(i,j,bi,bj) = -gamU(i,j,bi,bj)*gamU(ip,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C-- At this stage, the 3-diagonal system is reduced to Identity with two |
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C more columns (alp & gam) corresponding to unknow X(i=0) and X(i=sNx+1): |
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C X_0 |
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C alp 1 0 ... 0 0 gam X_1 Y_1 |
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C alp 0 1 ... 0 0 gam X_2 Y_2 |
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C |
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C . . . ... . . . . . |
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C ( . . . ... . . . )( . ) = ( . ) |
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C . . . ... . . . . . |
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C |
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C alp 0 0 ... 1 0 gam X_n-1 Y_n-1 |
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C alp 0 0 ... 0 1 gam X_n Y_n |
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C X_n+1 |
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C----- |
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|
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C-- Store tile edges coeff: (1) <--> i=1 ; (2) <--> i=sNx |
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DO j= 1,sNy |
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aTu(1,j,bi,bj) = alpU( 1, j,bi,bj) |
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cTu(1,j,bi,bj) = gamU( 1, j,bi,bj) |
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yTu(1,j,bi,bj) = yy_U( 1, j,bi,bj) |
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aTu(2,j,bi,bj) = alpU(sNx,j,bi,bj) |
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cTu(2,j,bi,bj) = gamU(sNx,j,bi,bj) |
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yTu(2,j,bi,bj) = yy_U(sNx,j,bi,bj) |
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ENDDO |
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|
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C end bi,bj-loops |
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ENDDO |
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ENDDO |
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|
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C-- Solve for tile edges values |
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IF ( nPx*nPy.GT.1 .OR. useCubedSphereExchange ) THEN |
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STOP 'ABNORMAL END: S/R SOLVE_UV_TRIDIAGO: missing code' |
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ENDIF |
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_BARRIER |
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_BEGIN_MASTER(myThid) |
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DO bj=1,nSy |
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DO j=1,sNy |
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|
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DO bi=2,nSx |
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bm = bi-1 |
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C- update row [1,bi] <- [1,bi] - a(1,bi)*[2,bi-1] (& normalise diag) |
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tmpVar = oneRL - aTu(1,j,bi,bj)*cTu(2,j,bm,bj) |
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IF ( tmpVar.NE.0. _d 0 ) THEN |
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tmpVar = 1. _d 0 / tmpVar |
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ELSE |
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tmpVar = 0. _d 0 |
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errCode = 1 |
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ENDIF |
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yTu(1,j,bi,bj) = ( yTu(1,j,bi,bj) |
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& - aTu(1,j,bi,bj)*yTu(2,j,bm,bj) |
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& )*tmpVar |
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cTu(1,j,bi,bj) = cTu(1,j,bi,bj)*tmpVar |
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aTu(1,j,bi,bj) = - aTu(1,j,bi,bj)*aTu(2,j,bm,bj)*tmpVar |
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|
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C- update row [2,bi] <- [2,bi] - a(2,bi)*[2,bi-1] + a(2,bi)*c(2,bi-1)*[1,bi] |
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tmpVar = aTu(2,j,bi,bj)*cTu(2,j,bm,bj) |
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yTu(2,j,bi,bj) = yTu(2,j,bi,bj) |
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& - aTu(2,j,bi,bj)*yTu(2,j,bm,bj) |
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& + tmpVar*yTu(1,j,bi,bj) |
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cTu(2,j,bi,bj) = cTu(2,j,bi,bj) |
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& + tmpVar*cTu(1,j,bi,bj) |
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aTu(2,j,bi,bj) = -aTu(2,j,bi,bj)*aTu(2,j,bm,bj) |
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& + tmpVar*aTu(1,j,bi,bj) |
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ENDDO |
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|
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DO bi=nSx-1,1,-1 |
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bp = bi+1 |
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DO i=1,2 |
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C- update row [1,bi] <- [1,bi] - c(1,bi)*[1,bi+1] |
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C- update row [2,bi] <- [2,bi] - c(2,bi)*[1,bi+1] |
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aTu(i,j,bi,bj) = aTu(i,j,bi,bj) |
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& - cTu(i,j,bi,bj)*aTu(1,j,bp,bj) |
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yTu(i,j,bi,bj) = yTu(i,j,bi,bj) |
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& - cTu(i,j,bi,bj)*yTu(1,j,bp,bj) |
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cTu(i,j,bi,bj) = -cTu(i,j,bi,bj)*cTu(1,j,bp,bj) |
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ENDDO |
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ENDDO |
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|
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C-- periodic in X: X_0 <=> X_Nx and X_(N+1) <=> X_1 ; |
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C find the value at the 2 opposite location (i=1 and i=Nx) |
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bm = 1 |
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bp = nSx |
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cTu(1,j,bm,bj) = oneRL + cTu(1,j,bm,bj) |
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aTu(2,j,bp,bj) = oneRL + aTu(2,j,bp,bj) |
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tmpVar = cTu(1,j,bm,bj) * aTu(2,j,bp,bj) |
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& - aTu(1,j,bm,bj) * cTu(2,j,bp,bj) |
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IF ( tmpVar.NE.0. _d 0 ) THEN |
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tmpVar = 1. _d 0 / tmpVar |
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ELSE |
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tmpVar = 0. _d 0 |
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errCode = 1 |
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ENDIF |
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uTmp1 = ( aTu(2,j,bp,bj) * yTu(1,j,bm,bj) |
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& - aTu(1,j,bm,bj) * yTu(2,j,bp,bj) |
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& )*tmpVar |
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uTmp2 = ( cTu(1,j,bm,bj) * yTu(2,j,bp,bj) |
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& - cTu(2,j,bp,bj) * yTu(1,j,bm,bj) |
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& )*tmpVar |
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|
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C- finalise tile-edges solution (put into RHS "yTu"): |
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DO bi=1,nSx |
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DO i=1,2 |
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IF ( bi+i .EQ.2 ) THEN |
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yTu(i,j,bi,bj) = uTmp1 |
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ELSEIF ( bi+i .EQ. nSx+2 ) THEN |
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yTu(i,j,bi,bj) = uTmp2 |
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ELSE |
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yTu(i,j,bi,bj) = yTu(i,j,bi,bj) |
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& - aTu(i,j,bi,bj) * uTmp2 |
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& - cTu(i,j,bi,bj) * uTmp1 |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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ENDDO |
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ENDDO |
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_END_MASTER(myThid) |
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_BARRIER |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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bm = 1 + MOD(bi-2+nSx,nSx) |
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bp = 1 + MOD(bi-0+nSx,nSx) |
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DO j= 1,sNy |
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DO i= 1,sNx |
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uFld(i,j,k,bi,bj) = yy_U(i,j,bi,bj) |
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& - alpU(i,j,bi,bj) * yTu(2,j,bm,bj) |
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& - gamU(i,j,bi,bj) * yTu(1,j,bp,bj) |
| 288 |
ENDDO |
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ENDDO |
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ENDDO |
| 291 |
ENDDO |
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|
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C end solve for uFld |
| 294 |
ENDIF |
| 295 |
|
| 296 |
IF ( solve4v ) THEN |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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|
| 300 |
C-- work on local copy: |
| 301 |
DO j= 1,sNy |
| 302 |
DO i= 1,sNx |
| 303 |
alpV(i,j,bi,bj) = aV(i,j,k,bi,bj) |
| 304 |
gamV(i,j,bi,bj) = cV(i,j,k,bi,bj) |
| 305 |
yy_V(i,j,bi,bj) = rhsV(i,j,k,bi,bj) |
| 306 |
ENDDO |
| 307 |
ENDDO |
| 308 |
|
| 309 |
C-- Beginning of forward sweep (j=1) |
| 310 |
j = 1 |
| 311 |
DO i= 1,sNx |
| 312 |
C- normalise row [1] ( 1 on main diagonal) |
| 313 |
tmpVar = bV(i,j,k,bi,bj) |
| 314 |
IF ( tmpVar.NE.0. _d 0 ) THEN |
| 315 |
tmpVar = 1. _d 0 / tmpVar |
| 316 |
ELSE |
| 317 |
tmpVar = 0. _d 0 |
| 318 |
errCode = 1 |
| 319 |
ENDIF |
| 320 |
gamV(i,j,bi,bj) = gamV(i,j,bi,bj)*tmpVar |
| 321 |
alpV(i,j,bi,bj) = alpV(i,j,bi,bj)*tmpVar |
| 322 |
yy_V(i,j,bi,bj) = yy_V(i,j,bi,bj)*tmpVar |
| 323 |
ENDDO |
| 324 |
|
| 325 |
C-- Middle of forward sweep (j=2:sNy) |
| 326 |
DO i= 1,sNx |
| 327 |
DO j= 2,sNy |
| 328 |
jm = j-1 |
| 329 |
C- update row [j] <-- [j] - alp_j * [j-1] and normalise (main diagonal = 1) |
| 330 |
tmpVar = bV(i,j,k,bi,bj) - alpV(i,j,bi,bj)*gamV(i,jm,bi,bj) |
| 331 |
IF ( tmpVar.NE.0. _d 0 ) THEN |
| 332 |
tmpVar = 1. _d 0 / tmpVar |
| 333 |
ELSE |
| 334 |
tmpVar = 0. _d 0 |
| 335 |
errCode = 1 |
| 336 |
ENDIF |
| 337 |
yy_V(i,j,bi,bj) = ( yy_V(i,j,bi,bj) |
| 338 |
& - alpV(i,j,bi,bj)*yy_V(i,jm,bi,bj) |
| 339 |
& )*tmpVar |
| 340 |
gamV(i,j,bi,bj) = gamV(i,j,bi,bj)*tmpVar |
| 341 |
alpV(i,j,bi,bj) = - alpV(i,j,bi,bj)*alpV(i,jm,bi,bj)*tmpVar |
| 342 |
ENDDO |
| 343 |
ENDDO |
| 344 |
|
| 345 |
C-- Backward sweep (j=sNy-1:-1:1) |
| 346 |
DO i= 1,sNx |
| 347 |
DO jj= 1,sNy-1 |
| 348 |
j = sNy - jj |
| 349 |
jp = j+1 |
| 350 |
C- update row [j] <-- [j] - gam_j * [j+1] |
| 351 |
yy_V(i,j,bi,bj) = yy_V(i,j,bi,bj) |
| 352 |
& - gamV(i,j,bi,bj)*yy_V(i,jp,bi,bj) |
| 353 |
alpV(i,j,bi,bj) = alpV(i,j,bi,bj) |
| 354 |
& - gamV(i,j,bi,bj)*alpV(i,jp,bi,bj) |
| 355 |
gamV(i,j,bi,bj) = -gamV(i,j,bi,bj)*gamV(i,jp,bi,bj) |
| 356 |
ENDDO |
| 357 |
ENDDO |
| 358 |
|
| 359 |
C-- At this stage, the 3-diagonal system is reduced to Identity with two |
| 360 |
C more columns (alp & gam) corresponding to unknow X(j=0) and X(j=sNy+1) |
| 361 |
|
| 362 |
C-- Store tile edges coeff: (1) <--> j=1 ; (2) <--> j=sNy |
| 363 |
DO i= 1,sNx |
| 364 |
aTv(1,i,bi,bj) = alpV(i, 1, bi,bj) |
| 365 |
cTv(1,i,bi,bj) = gamV(i, 1, bi,bj) |
| 366 |
yTv(1,i,bi,bj) = yy_V(i, 1, bi,bj) |
| 367 |
aTv(2,i,bi,bj) = alpV(i,sNy,bi,bj) |
| 368 |
cTv(2,i,bi,bj) = gamV(i,sNy,bi,bj) |
| 369 |
yTv(2,i,bi,bj) = yy_V(i,sNy,bi,bj) |
| 370 |
ENDDO |
| 371 |
|
| 372 |
C end bi,bj-loops |
| 373 |
ENDDO |
| 374 |
ENDDO |
| 375 |
|
| 376 |
C-- Solve for tile edges values |
| 377 |
IF ( nPx*nPy.GT.1 .OR. useCubedSphereExchange ) THEN |
| 378 |
STOP 'ABNORMAL END: S/R SOLVE_UV_TRIDIAGO: missing code' |
| 379 |
ENDIF |
| 380 |
_BARRIER |
| 381 |
_BEGIN_MASTER(myThid) |
| 382 |
DO bi=1,nSx |
| 383 |
DO i=1,sNx |
| 384 |
|
| 385 |
DO bj=2,nSy |
| 386 |
bm = bj-1 |
| 387 |
C- update row [1,bj] <- [1,bj] - a(1,bj)*[2,bj-1] (& normalise diag) |
| 388 |
tmpVar = oneRL - aTv(1,i,bi,bj)*cTv(2,i,bi,bm) |
| 389 |
IF ( tmpVar.NE.0. _d 0 ) THEN |
| 390 |
tmpVar = 1. _d 0 / tmpVar |
| 391 |
ELSE |
| 392 |
tmpVar = 0. _d 0 |
| 393 |
errCode = 1 |
| 394 |
ENDIF |
| 395 |
yTv(1,i,bi,bj) = ( yTv(1,i,bi,bj) |
| 396 |
& - aTv(1,i,bi,bj)*yTv(2,i,bi,bm) |
| 397 |
& )*tmpVar |
| 398 |
cTv(1,i,bi,bj) = cTv(1,i,bi,bj)*tmpVar |
| 399 |
aTv(1,i,bi,bj) = - aTv(1,i,bi,bj)*aTv(2,i,bi,bm)*tmpVar |
| 400 |
|
| 401 |
C- update row [2,bj] <- [2,bj] - a(2,bj)*[2,bj-1] + a(2,bj)*c(2,bj-1)*[1,bj] |
| 402 |
tmpVar = aTv(2,i,bi,bj)*cTv(2,i,bi,bm) |
| 403 |
yTv(2,i,bi,bj) = yTv(2,i,bi,bj) |
| 404 |
& - aTv(2,i,bi,bj)*yTv(2,i,bi,bm) |
| 405 |
& + tmpVar*yTv(1,i,bi,bj) |
| 406 |
cTv(2,i,bi,bj) = cTv(2,i,bi,bj) |
| 407 |
& + tmpVar*cTv(1,i,bi,bj) |
| 408 |
aTv(2,i,bi,bj) = -aTv(2,i,bi,bj)*aTv(2,i,bi,bm) |
| 409 |
& + tmpVar*aTv(1,i,bi,bj) |
| 410 |
ENDDO |
| 411 |
|
| 412 |
DO bj=nSy-1,1,-1 |
| 413 |
bp = bj+1 |
| 414 |
DO j=1,2 |
| 415 |
C- update row [1,bj] <- [1,bj] - c(1,bj)*[1,bj+1] |
| 416 |
C- update row [2,bj] <- [2,bj] - c(2,bj)*[1,bj+1] |
| 417 |
aTv(j,i,bi,bj) = aTv(j,i,bi,bj) |
| 418 |
& - cTv(j,i,bi,bj)*aTv(1,i,bi,bp) |
| 419 |
yTv(j,i,bi,bj) = yTv(j,i,bi,bj) |
| 420 |
& - cTv(j,i,bi,bj)*yTv(1,i,bi,bp) |
| 421 |
cTv(j,i,bi,bj) = -cTv(j,i,bi,bj)*cTv(1,i,bi,bp) |
| 422 |
ENDDO |
| 423 |
ENDDO |
| 424 |
|
| 425 |
C-- periodic in Y: X_0 <=> X_Ny and X_(N+1) <=> X_1 ; |
| 426 |
C find the value at the 2 opposite location (j=1 and j=Ny) |
| 427 |
bm = 1 |
| 428 |
bp = nSy |
| 429 |
cTv(1,i,bi,bm) = oneRL + cTv(1,i,bi,bm) |
| 430 |
aTv(2,i,bi,bp) = oneRL + aTv(2,i,bi,bp) |
| 431 |
tmpVar = cTv(1,i,bi,bm) * aTv(2,i,bi,bp) |
| 432 |
& - aTv(1,i,bi,bm) * cTv(2,i,bi,bp) |
| 433 |
IF ( tmpVar.NE.0. _d 0 ) THEN |
| 434 |
tmpVar = 1. _d 0 / tmpVar |
| 435 |
ELSE |
| 436 |
tmpVar = 0. _d 0 |
| 437 |
errCode = 1 |
| 438 |
ENDIF |
| 439 |
vTmp1 = ( aTv(2,i,bi,bp) * yTv(1,i,bi,bm) |
| 440 |
& - aTv(1,i,bi,bm) * yTv(2,i,bi,bp) |
| 441 |
& )*tmpVar |
| 442 |
vTmp2 = ( cTv(1,i,bi,bm) * yTv(2,i,bi,bp) |
| 443 |
& - cTv(2,i,bi,bp) * yTv(1,i,bi,bm) |
| 444 |
& )*tmpVar |
| 445 |
|
| 446 |
C- finalise tile-edges solution (put into RHS "yTv"): |
| 447 |
DO bj=1,nSy |
| 448 |
DO j=1,2 |
| 449 |
IF ( bj+j .EQ.2 ) THEN |
| 450 |
yTv(j,i,bi,bj) = vTmp1 |
| 451 |
ELSEIF ( bj+j .EQ. nSy+2 ) THEN |
| 452 |
yTv(j,i,bi,bj) = vTmp2 |
| 453 |
ELSE |
| 454 |
yTv(j,i,bi,bj) = yTv(j,i,bi,bj) |
| 455 |
& - aTv(j,i,bi,bj) * vTmp2 |
| 456 |
& - cTv(j,i,bi,bj) * vTmp1 |
| 457 |
ENDIF |
| 458 |
ENDDO |
| 459 |
ENDDO |
| 460 |
|
| 461 |
ENDDO |
| 462 |
ENDDO |
| 463 |
_END_MASTER(myThid) |
| 464 |
_BARRIER |
| 465 |
|
| 466 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 467 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 468 |
bm = 1 + MOD(bj-2+nSy,nSy) |
| 469 |
bp = 1 + MOD(bj-0+nSy,nSy) |
| 470 |
DO j= 1,sNy |
| 471 |
DO i= 1,sNx |
| 472 |
vFld(i,j,k,bi,bj) = yy_V(i,j,bi,bj) |
| 473 |
& - alpV(i,j,bi,bj) * yTv(2,i,bi,bm) |
| 474 |
& - gamV(i,j,bi,bj) * yTv(1,i,bi,bp) |
| 475 |
ENDDO |
| 476 |
ENDDO |
| 477 |
ENDDO |
| 478 |
ENDDO |
| 479 |
|
| 480 |
C end solve for vFld |
| 481 |
ENDIF |
| 482 |
|
| 483 |
C end k-loop |
| 484 |
ENDDO |
| 485 |
|
| 486 |
RETURN |
| 487 |
END |
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