Answers Database

CPLD: OPT=MERGE


Record #2215

Product Family:  Software

Product Line:  CPLD Implementation

Problem Title:
CPLD: OPT=MERGE


Problem Description:
Keywords: CPLD, opt, merge, attribute, property, 9500, 7300

Urgency: standard

General Description:

What is the OPT=MERGE attribute used for?





Solution 1:

Many users have seen this attribute in translated EDIF/ XNF
netlists. This attribute has been put on specific macros
which have a known optimization.  It is not a user attribute.

The OPT=MERGE attribute forces logic to be collapsed forward.
Where as the OPT=ON attribute gives the fitter the choice.



End of Record #2215