C CHOLE1    SOURCE    PV        13/10/23    21:15:01     7848           
      FUNCTION CHOLE1(ILIGF,LIGN,VALF,DAAG,IPKNO,IPPVF,KHG,IVPOF,               
     # KIDEP,KI1,KQ,imasq,idep,prec)
      IMPLICIT INTEGER(I-N)
      IMPLICIT REAL*8 (A-H,O-Z)                                                 
-INC SMMATRI                                                                    
-INC CCHOLE
      DIMENSION ILIGF(1),VALF(1),DAAG(1),IPKNO(1),IPPVF(1),IVPOF(1)
      dimension imasq(1)
      IPPKHG=IPPVF(KHG)                                                         
      KBAS=IPKNO(KIDEP)                                                         
      KHAU=IPKNO(KI1)                                                           
      KDIAG=KI1+1                                                               
      DNORM=ABS(VALF(KDIAG))*PREC
      KPREM=IVPOF(KHG)-IPPKHG                                                   
      DO 10 K=KBAS,KHAU                                                         
       LIG1=ILIGF(K)                                                            
       IF (LIG1.EQ.LIGN) GOTO 20                                                
       IECAR=KQ-LIG1.IPREL+1                                                    
       ICA=MAX(1,KIDEP+IECAR)                                                   
       ICB=LIG1.IMMM(/1)                                                        
       CALL CHOLE2(LIG1.IPPVV(1),VALF(1),LIG1.VAL(1),LIG1.IVPO(1),
     >  imasq(1),idep,prec,ica,icb,iecar,kprem,dnorm)
  10  CONTINUE                                                                  
      GOTO 50                                                                   
  20  CONTINUE                                                                  
      IECAR=KQ-IPREL+1                                                          
      DO 30 NNJ=MAX(1,KIDEP+IECAR),KI1+IECAR                                    
       KK=NNJ-IECAR                                                             
       NNJJ=IPPVF(NNJ+1)                                                        
       NJ=NNJJ-IPPVF(NNJ)                                                       
       LLOL=MIN(NJ,KK)-1                                                        
       LLON=MIN(LLOL-KK+KPREM+1,LLOL-NNJJ+IVPOF(NNJ)+1)                         
       IF (LLON.GT.0) THEN                                                      
        IEC1=KK-LLOL-1                                                          
        IEC2=NNJJ-IPPKHG-KK                                                     
        ideq=1+iec1+idep-1
        if (llon.gt.masdim+1) then
        p=ddotpw(llon,VALF(1+iec1),VALF(1+iec1+iec2),
     >     imasq(1),ideq)
        else
         if (imasq(ideq/masdim+1).gt.0.or.
     >       imasq((ideq+llon)/masdim+1).gt.0)
     >   p=ddotpv(llon,VALF(1+iec1),VALF(1+iec1+iec2))
        endif
        VALF(KK)=VALF(KK)-P
       ENDIF                                                                    
       IF (ABS(VALF(KK)).GT.DNORM) then
         KPREM=KK
         imasq((kk+idep-1)/masdim+1) =1
       ENDIF
  30  CONTINUE                                                                  
  50  CONTINUE                                                                  
      AUX1=0.D0                                                                 
      kdeb=1
  43  continue
      km1=0
      im=1
      DO 9 K=kdeb,KPREM
       km=(k+idep-1)/masdim+1
       if (km.ne.km1) then
        km1=km
        im=imasq(km)
       endif
       if (im.eq.0) goto 9
       if (im.lt.0) then
        imr=-im-idep+1
        if (imr.gt.k+5) then
          kdeb=imr
*           write (6,*) ' k kdeb ',k,imasq(km)
          GOTO 43
        else
         goto 9
        endif
       ENDIF
      AUX=VALF(K)                                                               
      VALF(K)=AUX/DAAG(K)                                                       
      AUX1=AUX1+AUX*VALF(K)                                                     
   9  CONTINUE                                                                  
      IVPOF(KHG)=KPREM+IPPKHG                                                   
      DO 8 K=KPREM+1,KI1                                                        
      VALF(K)=0.D0                                                              
   8  CONTINUE                                                                  
      CHOLE1=-AUX1                                                              
      RETURN                                                                    
      END