Question

$coverage_get_max(coverage_type, scope_def, modules_or_instance)

This function obtains the value representing 100% coverage for the specified coverage type over the specified portion of the hierarchy. This value shall remain constant across the duration of the simulation.

NOTE—This value is proportional to the design size and structure, so it also needs to be constant through multiple independent simulations and compilations of the same design, assuming any compilation options do not modify the coverage support or design structure.

The return value is an integer, with the following meanings.

-2 (‘SV_COV_OVERFLOW)
the value exceeds a number that can be represented as an integer.

-1 (‘SV_COV_ERROR)
an error occurred (typically due to using incorrect arguments).

0 (‘SV_COV_NOCOV)
no coverage is available for that coverage type on that/those hierarchy(ies).

+pos_num
the maximum coverage number (where pos_num > 0), which is the sum of all coverable items of that type over the given hierarchy(ies).

The scope of this function is specified as per $coverage_control (see Section 29.2.2.1).