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73 lines
2.4 KiB
73 lines
2.4 KiB
2 years ago
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C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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C=======================================================================
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SUBROUTINE MAKEVO (NELBLK, ISEVOK, IEV1, IEV2, IEVOUT, IEVSEL)
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C=======================================================================
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C --*** MAKEVO *** (ALGEBRA) Make up ISEVOK entry
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C -- Written by Amy Gilkey - revised 05/12/88
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C --
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C --MAKEVO makes up an ISEVOK entry based on two input entries. The output
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C --entry is true iff the two input entries are true. A flag indicates
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C --if the output entry is equal to one of the input entries, but the
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C --output entry is still set.
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C --
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C --Parameters:
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C -- NELBLK - IN - the number of element blocks
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C -- ISEVOK - IN/OUT - the variable truth table
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C -- IEV1, IEV2 - IN - the ISEVOK indices of the two input entries;
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C -- either index may be 0, but not both
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C -- IEVOUT - OUT - the ISEVOK index of the output entry
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C -- IEVSEL - OUT - the ISEVOK index of the input entry that is equal
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C -- to the output entry or the index of the output entry if
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C -- neither entry is equal
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LOGICAL ISEVOK(NELBLK,*)
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LOGICAL OK1, OK2
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OK1 = (IEV1 .GE. 1)
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OK2 = (IEV2 .GE. 1)
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IF ((IEV1 .GE. 1) .AND. (IEV2 .GE. 1)) THEN
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DO 100 IELB = 1, NELBLK
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IF (ISEVOK(IELB,IEV1) .EQV. ISEVOK(IELB,IEV2)) THEN
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ISEVOK(IELB,IEVOUT) = ISEVOK(IELB,IEV1)
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ELSE
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IF (ISEVOK(IELB,IEV1)) THEN
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OK1 = .FALSE.
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ELSE
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OK2 = .FALSE.
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END IF
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ISEVOK(IELB,IEVOUT) = .FALSE.
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END IF
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100 CONTINUE
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ELSE IF (IEV1 .GE. 1) THEN
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DO 110 IELB = 1, NELBLK
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ISEVOK(IELB,IEVOUT) = ISEVOK(IELB,IEV1)
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110 CONTINUE
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ELSE IF (IEV2 .GE. 1) THEN
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DO 120 IELB = 1, NELBLK
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ISEVOK(IELB,IEVOUT) = ISEVOK(IELB,IEV2)
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120 CONTINUE
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ELSE
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DO 130 IELB = 1, NELBLK
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ISEVOK(IELB,IEVOUT) = .TRUE.
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130 CONTINUE
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END IF
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IF (OK1) THEN
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IEVSEL = IEV1
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ELSE IF (OK2) THEN
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IEVSEL = IEV2
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ELSE
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IEVSEL = IEVOUT
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END IF
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RETURN
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END
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