Electrical computers and digital processing systems: processing – Processing control – Arithmetic operation instruction processing
Reexamination Certificate
2006-05-02
2006-05-02
Treat, William M. (Department: 2183)
Electrical computers and digital processing systems: processing
Processing control
Arithmetic operation instruction processing
Reexamination Certificate
active
07039792
ABSTRACT:
A method and system for implementing a floating point compare operation in an x86 compatible processor. The method includes the step of comparing a first bit pattern and a second bit pattern using a floating point unit of an x86 compatible processor. The EFLAGS register is set in accordance with a result of the comparison. A sign flag and an overflow flag of the EFLAGS register are encoded with information derived from the result of the comparison.
REFERENCES:
patent: 6247117 (2001-06-01), Juffa
patent: 6393555 (2002-05-01), Meier et al.
patent: 6934832 (2005-08-01), Van Dyke et al.
Transmeta Corporation
Treat William M.
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