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69 lines
2.4 KiB
Fortran
69 lines
2.4 KiB
Fortran
*DECK DVECS
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SUBROUTINE DVECS (NCOMP, LNFC, YHP, WORK, IWORK, INHOMO, IFLAG)
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C***BEGIN PROLOGUE DVECS
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C***SUBSIDIARY
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C***PURPOSE Subsidiary to DBVSUP
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C***LIBRARY SLATEC
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C***TYPE DOUBLE PRECISION (SVECS-S, DVECS-D)
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C***AUTHOR Watts, H. A., (SNLA)
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C***DESCRIPTION
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C
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C This subroutine is used for the special structure of COMPLEX*16
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C valued problems. DMGSBV is called upon to obtain LNFC vectors from an
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C original set of 2*LNFC independent vectors so that the resulting
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C LNFC vectors together with their imaginary product or mate vectors
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C form an independent set.
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C
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C***SEE ALSO DBVSUP
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C***ROUTINES CALLED DMGSBV
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C***COMMON BLOCKS DML18J
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C***REVISION HISTORY (YYMMDD)
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C 750601 DATE WRITTEN
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C 890831 Modified array declarations. (WRB)
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C 890921 Realigned order of variables in certain COMMON blocks.
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C (WRB)
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C 891009 Removed unreferenced statement label. (WRB)
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C 891214 Prologue converted to Version 4.0 format. (BAB)
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C 900328 Added TYPE section. (WRB)
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C 910722 Updated AUTHOR section. (ALS)
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C***END PROLOGUE DVECS
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C
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INTEGER ICOCO, IDP, IFLAG, INDPVT, INHOMO, INTEG, IWORK(*), K,
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1 KP, LNFC, LNFCC, MXNON, NCOMP, NDISK, NEQ, NEQIVP, NIC, NIV,
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2 NOPG, NPS, NTAPE, NTP, NUMORT, NXPTS
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DOUBLE PRECISION AE, DUM, RE, TOL, WORK(*), YHP(NCOMP,*)
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COMMON /DML18J/ AE,RE,TOL,NXPTS,NIC,NOPG,MXNON,NDISK,NTAPE,NEQ,
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1 INDPVT,INTEG,NPS,NTP,NEQIVP,NUMORT,LNFCC,
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2 ICOCO
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C***FIRST EXECUTABLE STATEMENT DVECS
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IF (LNFC .NE. 1) GO TO 20
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DO 10 K = 1, NCOMP
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YHP(K,LNFC+1) = YHP(K,LNFCC+1)
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10 CONTINUE
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IFLAG = 1
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GO TO 60
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20 CONTINUE
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NIV = LNFC
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LNFC = 2*LNFC
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LNFCC = 2*LNFCC
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KP = LNFC + 2 + LNFCC
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IDP = INDPVT
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INDPVT = 0
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CALL DMGSBV(NCOMP,LNFC,YHP,NCOMP,NIV,IFLAG,WORK(1),WORK(KP),
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1 IWORK(1),INHOMO,YHP(1,LNFC+1),WORK(LNFC+2),DUM)
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LNFC = LNFC/2
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LNFCC = LNFCC/2
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INDPVT = IDP
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IF (IFLAG .NE. 0 .OR. NIV .NE. LNFC) GO TO 40
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DO 30 K = 1, NCOMP
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YHP(K,LNFC+1) = YHP(K,LNFCC+1)
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30 CONTINUE
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IFLAG = 1
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GO TO 50
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40 CONTINUE
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IFLAG = 99
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50 CONTINUE
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60 CONTINUE
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CONTINUE
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RETURN
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END
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