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Logic Operation Completion Signal Generator

IP.com Disclosure Number: IPCOM000062323D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Broockman, EC [+details]

Abstract

In many machine and logic operations, a critical path directly determines the cycle time at which the machine will complete its operation. This, in turn, determines the effective throughput of the machine. An example is a typical arithmetic logic unit (ALU). The ALU has a carry- out signal or register which is part of the critical path. For random sets of data operations, the carry-out will be exercised only a small percentage of the time. The ALU has actually completed its operation but there may be delays between completion of the logic function and the carry-out operation. If there existed a signal to indicate the ALU had completed operation, the machine cycle time could be shrunk for that particular cycle.