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*DECK MCGFLS
SUBROUTINE MCGFLS(IMPX,IPTRK,IPMACR,NUN,K,NREG,NLONG,M,NG,NGEFF,
1 LC,LFORW,PACA,NZON,KEYFLX,KEYCUR,NGIND,KPSYS,
2 NCONV,EPSI,MAXI,FIMEM,QFR)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Synthetic diffusion (ACA) flux calculation.
*
*Copyright:
* Copyright (C) 2002 Ecole Polytechnique de Montreal
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version
*
*Author(s): I. Suslov and R. Le Tellier
*
*Parameters: input
* IMPX print flag (equal to zero for no print).
* IPTRK pointer to the tracking (L_TRACK signature).
* IPMACR pointer to the macrolib LCM object.
* NUN number of unknowns per group.
* K number of volumes and outer surfaces.
* NREG number of volume regions.
* NLONG size of the corrective system.
* M number of material mixtures.
* NG number of groups.
* NGEFF number of groups to process.
* LC dimension of profiled matrices MCU and CQ.
* LFORW flag set to .false. to transpose the coefficient matrix.
* PACA type of preconditioner to solve the ACA corrective system.
* NZON index-number of the mixture type assigned to each volume.
* KEYFLX position of flux elements in FIMEM vector.
* KEYCUR position of current elements in FIMEM vector.
* NGIND index of the groups to process.
* KPSYS pointer to system groups.
* NCONV array of convergence flag for each group.
* EPSI stopping criterion for BICGSTAB in ACA resolution.
* MAXI maximum number of iterations allowed for BICGSTAB in ACA
* resolution.
* QFR input source vector.
*
*Parameters: input/output
* FIMEM unknown vector.
*
*-----------------------------------------------------------------------
*
USE GANLIB
*----
* SUBROUTINE ARGUMENTS
*----
TYPE(C_PTR) KPSYS(NGEFF),IPTRK,IPMACR
INTEGER IMPX,NUN,K,NREG,M,NG,NGEFF,LC,PACA,NZON(NLONG),
1 KEYFLX(NREG),KEYCUR(NLONG-NREG),NGIND(NGEFF),MAXI
REAL EPSI,FIMEM(NUN,NGEFF),QFR(NUN,NGEFF)
LOGICAL LFORW,NCONV(NGEFF)
*----
* LOCAL VARIABLES
*----
TYPE(C_PTR) JPSYS
INTEGER, TARGET, SAVE, DIMENSION(1) :: IDUMMY
REAL, TARGET, SAVE, DIMENSION(1) :: DUMMY
*----
* ALLOCATABLE ARRAYS
*----
TYPE(C_PTR) IM_PTR,MCU_PTR,JU_PTR,IM0_PTR,MCU0_PTR,IPERM_PTR,
1 DIAGF_PTR,CF_PTR,CQ_PTR,LUDF_PTR,LUCF_PTR,DIAGQ_PTR
INTEGER, POINTER, DIMENSION(:) :: IM,MCU,IPERM,JU,IM0,MCU0
REAL, POINTER, DIMENSION(:) :: DIAGQ,CQ,LUDF,LUCF,CF,DIAGF
*----
* INITIALIZE POINTERS
*----
JU=>IDUMMY
IM0=>IDUMMY
MCU0=>IDUMMY
LUDF=>DUMMY
LUCF=>DUMMY
CF=>DUMMY
DIAGF=>DUMMY
*
IF(K.LE.0) CALL XABORT('MCGFLS: INVALID VALUE OF K.')
M1=M+1
* recover connection matrices
CALL LCMGPD(IPTRK,'IM$MCCG',IM_PTR)
CALL LCMGPD(IPTRK,'MCU$MCCG',MCU_PTR)
CALL C_F_POINTER(IM_PTR,IM,(/ NLONG+1 /))
CALL C_F_POINTER(MCU_PTR,MCU,(/ LC /))
* recover permutation array
CALL LCMGPD(IPTRK,'PI$MCCG',IPERM_PTR)
CALL C_F_POINTER(IPERM_PTR,IPERM,(/ NLONG /))
IF(PACA.GE.2) THEN
CALL LCMGPD(IPTRK,'JU$MCCG',JU_PTR)
CALL C_F_POINTER(JU_PTR,JU,(/ NLONG /))
ENDIF
IF(PACA.EQ.3) THEN
CALL LCMLEN(IPTRK,'IM0$MCCG',LIM0,ITYLCM)
CALL LCMLEN(IPTRK,'MCU0$MCCG',LMCU0,ITYLCM)
CALL LCMGPD(IPTRK,'IM0$MCCG',IM0_PTR)
CALL LCMGPD(IPTRK,'MCU0$MCCG',MCU0_PTR)
CALL C_F_POINTER(IM0_PTR,IM0,(/ LIM0 /))
CALL C_F_POINTER(MCU0_PTR,MCU0,(/ LMCU0 /))
ELSE
LMCU0=0
ENDIF
DO II=1,NGEFF
IF(NCONV(II)) THEN
JPSYS=KPSYS(II)
CALL LCMGPD(JPSYS,'DIAGF$MCCG',DIAGF_PTR)
CALL LCMGPD(JPSYS,'CF$MCCG',CF_PTR)
CALL C_F_POINTER(DIAGF_PTR,DIAGF,(/ NLONG /))
CALL C_F_POINTER(CF_PTR,CF,(/ LC /))
IF(PACA.GE.2) THEN
CALL LCMGPD(JPSYS,'ILUDF$MCCG',LUDF_PTR)
CALL C_F_POINTER(LUDF_PTR,LUDF,(/ NLONG /))
IF(PACA.LT.4) THEN
CALL LCMGPD(JPSYS,'ILUCF$MCCG',LUCF_PTR)
CALL C_F_POINTER(LUCF_PTR,LUCF,(/ LC /))
ENDIF
ENDIF
CALL LCMGPD(JPSYS,'DIAGQ$MCCG',DIAGQ_PTR)
CALL LCMGPD(JPSYS,'CQ$MCCG',CQ_PTR)
CALL C_F_POINTER(DIAGQ_PTR,DIAGQ,(/ NLONG /))
CALL C_F_POINTER(CQ_PTR,CQ,(/ LC /))
CALL MCGCDD(IMPX,IPMACR,II,NG,NGEFF,NGIND,NCONV,M,NLONG,NUN,
1 NREG,LC,LFORW,PACA,NZON,KEYFLX,KEYCUR,IPERM,IM,MCU,JU,
2 EPSI,MAXI,FIMEM(1,II),QFR,DIAGQ,CQ,DIAGF,CF,LUDF,LUCF,
3 LMCU0,IM0,MCU0)
ENDIF
ENDDO
*
RETURN
END
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