Globally or selectively disabling branch history table operation

Details Globally or selectively disabling branch history table operation Globally or selectively disabling branch history table operation

1998-04-30

2000-08-22

Kim, Kenneth S.

Electrical computers and digital processing systems: processing

Processing control

Branching

712243, G06F 932

Patent

active

061087769

ABSTRACT:
A millimode capable computer system provides control to millicode to allow the BHT operations to continue except when the these special situations occur that require control of instruction fetch operations must be provided and the BHT can be turned off for some sections of code execution, but not disabled for all. A single free running BHT functions for both a normal mode and a millimode for the central processor which can execute in millimode with a branch history table directing instruction fetch for which both a global BHT disable and millicode disables exist. Hit detection logic receives input from the global BHT disable, as well as from an initialized control register bit and a processor control register bit to select the correct set target information and generate a "branch history table hit detected" control signal.

REFERENCES:
patent: 5228131 (1993-07-01), Ueda et al.
patent: 5276882 (1994-01-01), Emma et al.
patent: 5345567 (1994-09-01), Hayden et al.
patent: 5634119 (1997-05-01), Emma et al.
patent: 5694617 (1997-12-01), Webb et al.

Affiliated with

Also associated with

Rating

Globally or selectively disabling branch history table operation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Globally or selectively disabling branch history table operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Globally or selectively disabling branch history table operation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-595081