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C $Header: /u/gcmpack/MITgcm/model/inc/CG2D.h,v 1.16 2009/11/23 16:13:57 mlosch Exp $ |
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C $Name: $ |
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CBOP |
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C !ROUTINE: CG2D.h |
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C !INTERFACE: |
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C include "CG2D.h" |
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C |
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C !DESCRIPTION: |
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C \bv |
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C *==========================================================* |
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C | CG2D.h |
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C | o Two-dimensional conjugate gradient solver header. |
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C *==========================================================* |
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C | Internal (private) data structures. |
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C *==========================================================* |
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C \ev |
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CEOP |
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C-- COMMON /CG2D_I_L/ cg2dNormaliseRHS |
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C cg2dNormaliseRHS :: flag set to TRUE if normalise RHS in the Solver |
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COMMON /CG2D_I_L/ cg2dNormaliseRHS |
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LOGICAL cg2dNormaliseRHS |
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C-- COMMON /CG2D_R/ DEL**2 Laplacian operators |
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C aW2d :: East-west operator. |
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C aS2d :: North-south operator. |
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C aC2d :: 2D operator main diagonal term. |
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C pW :: East-west off-diagonal term of preconditioner. |
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C pS :: North-south off-diagonal term of preconditioner. |
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C pC :: Main diagonal term of preconditioner. |
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C cg2dNorm :: A matrix normalisation factor. |
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C cg2dTolerance :: cg2d solver Tolerance (solver unit = m2/s2 or no unit, |
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C depending on cg2dNormaliseRHS) |
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COMMON /CG2D_I_R/ |
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& aW2d, aS2d, aC2d, |
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& pW, pS, pC, |
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& cg2dNorm, cg2dTolerance |
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_RS aW2d (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS aS2d (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS aC2d (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS pW (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS pS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS pC (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL cg2dNorm, cg2dTolerance |
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C-- COMMON /CG2D_I_WK_R/ Work array common block |
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C cg2d_q :: Intermediate matrix-vector product term |
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C cg2d_r :: *same* |
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C cg2d_s :: *same* |
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COMMON /CG2D_I_WK_R/ |
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& cg2d_q, cg2d_r, cg2d_s |
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_RL cg2d_q(1-1:sNx+1,1-1:sNy+1,nSx,nSy) |
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!#ifdef ALLOW_CG2D_NSA |
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#if defined (ALLOW_CG2D_NSA) || defined (ALLOW_DIFFERENTIATE_CG2D_MATRIX) |
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_RL cg2d_r(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL cg2d_s(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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#else /* ALLOW_CG2D_NSA */ |
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_RL cg2d_r(1-1:sNx+1,1-1:sNy+1,nSx,nSy) |
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_RL cg2d_s(1-1:sNx+1,1-1:sNy+1,nSx,nSy) |
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#endif /* ALLOW_CG2D_NSA */ |
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#ifdef ALLOW_CG2D_NSA |
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C-- COMMON /CG2D_I_WK_R2/ extra work array common block |
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C cg2d_z :: Intermediate matrix-vector product term |
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C :: reduces the number of recomputation in adjoint mode |
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C :: this field is superfluous if your cg2d is self-adjoint. |
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COMMON /CG2D_I_WK_R2/ cg2d_z |
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_RL cg2d_z(1-1:sNx+1,1-1:sNy+1,nSx,nSy) |
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#endif /* ALLOW_CG2D_NSA */ |
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#ifdef ALLOW_SRCG |
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C-- COMMON /CG2D_I_WK_R3/ Work array common block |
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C cg2d_y :: residual scaled by preconditioner |
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C cg2d_v :: z times the operator |
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C cg2d_q :: Intermediate matrix-vector product term |
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C cg2d_r :: *same* |
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C cg2d_s :: *same* |
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C sumPhi :: needed to call global_vec_sum_r8 when mutli-threaded |
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COMMON /CG2D_I_WK_R3/ |
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& cg2d_y,cg2d_v,sumPhi |
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_RL cg2d_y(1-1:sNx+1,1-1:sNy+1,nSx,nSy) |
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_RL cg2d_v(1-1:sNx+1,1-1:sNy+1,nSx,nSy) |
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_RL sumPhi(3,nSx,nSy) |
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#endif /* ALLOW_SRCG */ |
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