International Business Machines Corporation

Globalfoundries Inc.

Ursel Hahn

Joerg Deutschle

Joerg H Walter

Ernst-Dieter Weissenberger

Lothar Felten

Klaus Keuerleber

Generating instructions, in particular for mailbox verification in a simulation environment. A sequence of instructions is received, as well as selection data representative of a plurality of commands including a special command. Repeatedly selecting one of the plurality of commands and outputting an instruction based on the selected command. The outputting of an instruction includes outputting a next instruction in the sequence of instructions if the selected command is the special command, and outputting an instruction associated with the command if the selected command is not the special command.

Instruction generation based on selection or non-selection of a special command

Instruction output dependent on a random number-based selection or non-selection of a special command from a group of commands

The present invention relates to a method for generating coverage data for a switch frequency of HDL or VHDL signals with the steps of providing a HDL or VHDL hardware description model within a register transfer level, providing a filtering algorithm or filtering rules for signals occurring in the HDL or VHDL hardware description model, extracting signals from the HDL or VHDL hardware description model according to said filtering algorithm or filtering rules in order to get relevant signals, performing a simulation process of the HDL or VHDL hardware description model, performing a checking routine for the relevant signals in every cycle and storing and/or cumulating the relevant signals in a data base. Further the present invention relates to a corresponding system.

Generating coverage data for a switch frequency of HDL or VHDL signals

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Lichtenwald, Germany

Ursel Hahn