Device for effectively controlling a branch history table for an

Details Device for effectively controlling a branch history table for an Device for effectively controlling a branch history table for an

1990-05-24

1994-05-31

Bowler, Alyssa H.

Boots, shoes, and leggings

395425, 364DIG1, 3642613, 3642631, 364254, G06F 900

Patent

active

053177029

ABSTRACT:
For use in an instruction prefetching system for carrying out instruction prefetch in a data processing system in controlling a branch history table responsive to an instruction request address for producing a historical branch instruction address and a corresponding branch destination address, a device uses a detect mode which is determined by the prefetching system to indicate whether the branch destination address should or should not be used in the instruction prefetch. When the historical branch instruction address is retrieved from the table and furthermore when the branch destination address should be used, the branch destination address is actually used in the instruction prefetch. When the historical branch instruction address is retrieved and furthermore when the branch destination address should not be used, a signal is produced to indicate that the historical branch instruction address is found. In this event, the device does not send the branch destination address to the prefetching system. The device is particularly useful when a conditional branch instruction should be executed repeatedly a predetermined number of times.

REFERENCES:
patent: 3559183 (1971-01-01), Sussenguth
patent: 4477872 (1984-10-01), Losg et al.
patent: 4760520 (1988-07-01), Shintani et al.
patent: 4763245 (1988-08-01), Emma et al.
patent: 4764866 (1988-08-01), Downey
patent: 4777594 (1988-10-01), Jones et al.
patent: 4853840 (1989-08-01), Shibuya
patent: 4943908 (1990-07-01), Emma et al.
patent: 4984154 (1991-01-01), Hanatani et al.
patent: 4991080 (1991-02-01), Emma et al.
patent: 5088030 (1992-02-01), Yoshida
patent: 5121473 (1992-06-01), Hodges
David J. Lilja, "Reducing the Branch Penalty in Pipelined Processors", Computer, Jul. 1988, pp. 47-55.

Affiliated with

Also associated with

Rating

Device for effectively controlling a branch history table for an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for effectively controlling a branch history table for an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for effectively controlling a branch history table for an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1634620