[.6 Level 6 Subprograms

B.6.1 ACYCLC

 This subroutine, written by Cunningham (1973) as part of the

HASSAL subroutine package, performs the acyclic algorithm on an SIM.

It can be made to consider only elements with weights equal to zero or

all elements.

B.6.2 CALCDC

 This subroutine computes the degree of decoupling for a partial

decoupling by calculating, from function index definitions, the expected

number of functions decoupled.

B.6.3 CLRMEM

 This subroutine clears MEMORY of unneeded data items. It does

this by searching MEMDIR (the directory to MEMORY) for data items with

a type code of "-1," which indicates that the data item is no longer

needed. Each time one is found, the remaining data in both MEMDIR and

MEMORY which are to be retained are shifted up in the vector to fill the

space previously occupied by the unneeded data. The pointers in MEMDIR

are updated to reflect the shift in the data items in MEMORY.

B.6.4 EVALUS

 EVALU8 can be considered to be a FORTRAN interpreter. It

evaluates compute strings, which are actually representations of

F0RTRAN statements. EVALU8 can interpret any FORTRAN arithmetic or

logical expression which is in compute string form.

B.6.5 HASSAL

 Written by Cunningham (1973), HASSAL performs the weighted

output set assignment, described by Gupta et al. (1974), for an