Electrical computers and digital processing systems: processing – Processing control – Branching
Reexamination Certificate
2011-03-29
2011-03-29
Chan, Eddie P (Department: 2183)
Electrical computers and digital processing systems: processing
Processing control
Branching
Reexamination Certificate
active
07917740
ABSTRACT:
In one embodiment, a processor comprises an execution core configured to detect a freeze event responsive to an error indication, an ignore error indication, and an instruction in a guest. The instruction belongs to a predefined subset of instructions associated with the error indication and the ignore error indication. The execution core is configured to exit the guest in response to detecting the freeze event. In some embodiments, the error indication and the ignore indication may be stored in one or more registers in the processor. In some embodiments, the instruction is a floating point instruction, the error indication is a floating pointer error indication, and the ignore error indication is an ignore floating point error indication. In some embodiments, the error indication may correspond to an error signal output by the processor, and the ignore error indication may correspond to an ignore error signal input to the processor.
REFERENCES:
patent: 5134693 (1992-07-01), Saini
patent: 5303378 (1994-04-01), Cohen
patent: 5559977 (1996-09-01), Avnon et al.
patent: 5664138 (1997-09-01), Yoshida
patent: 5826084 (1998-10-01), Brooks et al.
patent: 5860000 (1999-01-01), Biswas et al.
patent: 6772327 (2004-08-01), Biswas et al.
patent: 2003/0037227 (2003-02-01), Nomura
patent: 2003/0217250 (2003-11-01), Bennett et al.
patent: 2004/0117532 (2004-06-01), Bennett et al.
P.H. Gum, “System/370 Extended Architecture: Facilities for Virtual Machines,” IBM J. Res Develop., vol. 27, No. 6, Nov. 1983, (pp. 530-544).
Jeff Lu, i486 Processor Hardware Reference Manual, 1990, (3 Pages).
James L. Turley, “Advanced 80386 Programming Techniques,” ISBN 0-07-881342-5, (35 Pages).
Greske Michael S.
Klaiber Alexander C.
Advanced Micro Devices , Inc.
Chan Eddie P
Faherty Corey
Merkel Lawrence J.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
LandOfFree
Virtualization assist for legacy x86 floating point... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Virtualization assist for legacy x86 floating point..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Virtualization assist for legacy x86 floating point... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2662901