SIMSCRIPT II.5 Programming Language

Advanced Topics
Table 6-2. Intrpacking Factors for Common 32-Bit Machines
Intrapacking Factor
Attribute Value
Placement
(*/2) 2 values per word
(*/4) 4 values per word
Attributes are usually assigned locations within the entity structure in order of their appearance in
an every statement, taking any explicit equivalencing and packing into account. It is also possible,
however, to specify exactly where an attribute is to be placed within a temporary entity structure by
following its declaration with the clause in word i, where is an integer constant, as in examples
1. and 2. below.
1. Declaration:
temporary entities
every PERSON owns a FAMILY, has an AGE in word 1,
and has a HEIGHT
Entity structure:
word 1 AGE
word 2
HEIGHT
word 3 F.FAMILY
word 4 L.FAMILY
word 5
N.FAMILY
It may be seen that AGE now occupies the first location.
2. Declaration:
every PERSON has an (AGE(1/4),SEX(2/4),HEIGHT(2/2))
in word 1 and a DEBT in word 2
Entity structure:
word 1 AGE SEX HEIGHT
word 2
DEBT
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