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cnh |
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C $Header: /u/gcmpack/models/MITgcmUV/model/inc/CG2D.h,v 1.8 2001/05/29 14:01:36 adcroft 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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cnh |
1.1 |
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adcroft |
1.8 |
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 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 etaNBuf - Shared buffers for accumulating con. grad vector product. |
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C alphaBuf |
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C errBuf |
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C nrmBuf |
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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, |
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& aS2d, |
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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 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 - " |
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C cg2d_s - " |
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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-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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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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