The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1999
Filed:
Jun. 11, 1997
David P Hunter, Mountain View, CA (US);
William K Colgate, Issaquah, WA (US);
Richard L Sites, Menlo Park, CA (US);
Thomas Van Baak, Bellevue, WA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A compiler-loader system enables the creation of different loaded executable images in target computers complying with different versions of an instruction-set architecture, the different images being created from a single executable program on secondary storage. The compiler generates an executable program containing a routine executable on both versions of the target computers, and also containing an architecture entry with (i) an address of the program location from which the routine is called, (ii) an instruction executable on only one version of the target computers that performs the same function as the routine but with superior performance, and (iii) a value indicating which version of the target machines the instruction can be executed on. The loader determines whether the target machine can execute the instruction, and if so replaces the subroutine call appearing at the address in the architecture entry with the instruction appearing in the architecture entry.