Methods and apparatus to insure correct predecode

Details Methods and apparatus to insure correct predecode Methods and apparatus to insure correct predecode

2008-05-20

2008-05-20

Chan, Eddie (Department: 2183)

Electrical computers and digital processing systems: processing

Instruction decoding

Predecoding of instruction component

Reexamination Certificate

active

07376815

ABSTRACT:
Techniques for ensuring a synchronized predecoding of an instruction string are disclosed. The instruction string contains instructions from a variable length instruction set and embedded data. One technique includes defining a granule to be equal to the smallest length instruction in the instruction set and defining the number of granules that compose the longest length instruction in the instruction set to be MAX. The technique further includes determining the end of an embedded data segment, when a program is compiled or assembled into the instruction string and inserting a padding of length, MAX−1, into the instruction string to the end of the embedded data. Upon predecoding of the padded instruction string, a predecoder maintains synchronization with the instructions in the padded instruction string even if embedded data is coincidentally encoded to resemble an existing instruction in the variable length instruction set.

REFERENCES:
patent: 5448746 (1995-09-01), Eickemeyer et al.
patent: 6192465 (2001-02-01), Roberts
patent: 6247097 (2001-06-01), Sinharoy
patent: 6253309 (2001-06-01), Mahalingaiah
patent: 2004/0107217 (2004-06-01), Hastings
patent: 05116819 (2005-12-01), None

Affiliated with

Also associated with

Rating

Methods and apparatus to insure correct predecode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus to insure correct predecode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus to insure correct predecode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2755712