Posting out-of-sequence fetches

Details Posting out-of-sequence fetches Posting out-of-sequence fetches

1987-05-18

1991-02-05

Eng, David Y

Boots, shoes, and leggings

36424361, 3642443, 3642625, 3642629, 3642656, G06F 1106, G06F 1128

Patent

active

049910906

ABSTRACT:
Monitoring apparatus is provided to allow out-of-sequence fetching of operands while preserving the appearance of in-sequence fetching to the processor of a computer. The key elements include a stack (119) of N entries holding the addresses of the last M, where M is less than or equal to N, out-of-sequence fetches. A comparator (103) is provided for comparing addresses in the stack with a test address. This test address is supplied via an OR gate (107) as either store addresses or cross-invalidate addresses, the latter being for a multiprocessor system. The addresses in the stack that compare with the test address are set as invalid. In addition, all addresses in the stack are set as invalid on the occurrence of a cache miss or serializing instruction. Finally, a select and check entry function (113) associates an address in the stack with the instruction it represents and deletes the address from the stack when the instruction is handled in its proper sequence.

REFERENCES:
patent: 3401376 (1968-09-01), Barnes et al.
patent: 3553655 (1971-01-01), Anderson et al.
patent: 4092713 (1978-05-01), Scheuneman
patent: 4189772 (1980-02-01), Liptay
patent: 4197580 (1980-04-01), Chang et al.
patent: 4200927 (1980-04-01), Hughes et al.
patent: 4228503 (1980-10-01), Waite et al.
patent: 4279016 (1981-07-01), Leininger et al.
patent: 4354232 (1982-10-01), Ryan
patent: 4399507 (1983-08-01), Cosgrove, et al.
patent: 4438492 (1984-03-01), Harmon, Jr. et al.
patent: 4471433 (1984-09-01), Matsumoto et al.
patent: 4484267 (1984-11-01), Fletcher
patent: 4594659 (1986-06-01), Guenthner et al.
patent: 4594660 (1986-06-01), Guenthner et al.
patent: 4637024 (1987-01-01), Dixon et al.
patent: 4648030 (1987-03-01), Bomba et al.
patent: 4654819 (1987-03-01), Stiffler et al.
patent: 4683549 (1987-07-01), Takaki
patent: 4791557 (1988-12-01), Angel et al.

Affiliated with

Also associated with

Rating

Posting out-of-sequence fetches does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Posting out-of-sequence fetches, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Posting out-of-sequence fetches will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-16290