Unisys Corporation

Allen B Tabbert

James Edward Rezek

Harold E Reindel

Douglas J Gilbert

Data structure definitions set forth in one language may be shared between different programming languages. Data structures that include one or more elements are defined in both an assembly language source code file and in high-level language source code file, with the definitions in the assembly language source code file being in the high-level language. The storage requirements of the data structures are determined from the definitions set forth in the assembly source file and the definitions are removed from the assembly source file prior to processing by an assembler. Memory allocation directives that are included in the assembly source file specify memory addresses of the data structures and are removed from the assembly source program prior to processing by the assembler. The assembly source file includes references to elements of the data structures in the form of substitution directives. Using the memory allocation directives and the data structure definitions, the substitution directives are replaced with memory addresses or element sizes prior to processing by the assembler.

Method and apparatus for sharing data structures between assembly language programs and high-level language programs

A method used by an electronic design automation system for stabilizing the names of components and nets of an integrated circuit from one design version to another. A previous integrated circuit design version and a current integrated circuit design version are partitioned into multiple cones of logic design. Each cone of logic design is defined by a path from a logic designer-defined apex net to a logic designer-defined base net affecting the apex net. Selected cones of logic design are compared. If the selected cones have identical logical structure, the component and net names of the previous integrated circuit design version are transferred to the current integrated circuit design version. If the selected cones of logic design do not have identical structure, then the component and net names for subsections of the selected cones of logic design that do have identical logical structure are transferred to the current integrated circuit design version, and new component and net names are assigned to those subsections of the selected cones of logic design from the current integrated circuit design version which did not exist in the previous integrated circuit design version.

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Bloomington, MN, United States of America

Allen B Tabbert