A system for communicating simulation solutions between circuit components in a hierarchical data structure includes a simulator module having one or more computer programs for representing the circuit as a hierarchically arranged set of branches, which includes a root branch and a plurality of other branches logically organized in a graph. The hierarchically arranged set of branches includes a first branch that contains one or more driver leaf circuits and a second branch that also contains one or more receiver leaf circuits, where the first branch and second branch are interconnected in the graph through a third branch at a higher hierarchical level in the graph than the first and second branches. The simulator module further includes computer programs for simulating operation of the one or more driver leaf circuits and the one or more receiver leaf circuits, together, without simulating operation of the third branch to determine a first set of changes in signal conditions shared by the one or more driver leaf circuits and the one or more receiver leaf circuits.
A method for circuit design includes performing a timing analysis of a design of a processing stage in an integrated electronic circuit, and specifying a cycle time of the circuit. Responsively to the cycle time and to the timing analysis, a window is identifying within the processing stage containing a set of connection points among the circuit components at which the processing stage may be split for addition of multithreading capability to the circuit. A subset of the connection points is selected, and splitter components are inserted at the connection points in the subset.
