The following describes an overview of changes included within version 20060406 (3.23.21) of the following ATLAS compiler(s)

CASS/RT
ESTS/PAWS
IFTE/PAWS

1.1 Enhancements

1.2 Problem Reports

06-006

2.0 Detailed Description

2.1 Enhancements

None

2.2 Problem Reports

2.2.1 06-006 - Too many Structures - IF, FOR etc

All IEEE716/1985 based compilers, including CASS/RT, use the general workspace file for the following three purposes, as follows:

• ATLAS Symbols ('Labels')
• Program Structure Tree
• Statement Number Table

That data is organized into two pools, as follows

• ATLAS Symbols + Program Structure Tree
• Statement Number Table

The first pool, i.e. ATLAS Symbols + Program Structure, as a result of the addressing architecture, is limited in size to 131KByte. The Program Structure Tree requires an entry for each ATLAS procedure, IF statement, FOR statement, WHILE statement, MEASURE / VERIFY TIME INTERVAL statement and BEGIN, ATLAS statement. ATLAS Programs that included a large number of those statements, usually IF / FOR / WHILE could result in the overflow of that pool.

The pool containing the Statement Number Table has a size limit of 64MByte.

This release of the CASS/RT compiler has separated the ATLAS Symbols and Program Structure elements into two separate pools, each having a limit of 131KByte. The result is that ATLAS programs with a far larger number of IF / FOR / WHILE statements can now be processed. It is intended that similar changes will be implemented into all IEEE716/1985 compilers at the next major release.