Cache store bypass for computer

Details Cache store bypass for computer Cache store bypass for computer

1985-11-12

1990-07-17

Shaw, Gareth D.

Boots, shoes, and leggings

364243, 3642434, 36424341, 36424343, 36424344, G06F 1208, G06F 15347

Patent

active

049425188

ABSTRACT:
A physical cache unit (100) is used within a computer (20). The computer (20) further includes a main memory (99) a memory control unit (22), inputs/output processors (54, 68) and a central processor (156). The central processor includes an address translation unit (118), an instruction processing unit (126), an address scalar unit (142), a vector control unit (144) and vector processing units (148, 150). The physical cache unit (100) stores operands in a data cache (180), the operands for delivery to and receipt from the control processor (156). Addresses for requested operands are received from the central processor (156) and are examined concurrently during one clock cycle in tag stores (190 and 192). The tag stores (190 and 192) produce tags which are compared in comparators (198 and 200) to the tag of physical addresses received from the central processor (156). If a comparison is made, a hit, both of the requested operands are read, during one clock period, from the data cache (180) and transmitted to the central processor (156). If the requested operands are not in the data cache (180) they are fetched from the main memory (99). The operands requested from the main memory (99) within a block are placed in a buffer (188) and/or transmitted directly through a bypass bus (179) to the central processor (156). Concurrently, the block of operands fetched from main memory (99) may be stored in the data cache (180) for subsequent delivery to the central processor (156) upon request. Further, a block of operands from the central processor (156) can be transmitted directly to the memory control unit 22 and bypass the data cache (180).

REFERENCES:
patent: 3866183 (1975-02-01), Lange
patent: 3896419 (1975-07-01), Lange et al.
patent: 4070706 (1978-01-01), Scheuneman
patent: 4169284 (1979-09-01), Hogan et al.
patent: 4315312 (1982-02-01), Schmidt
patent: 4370710 (1983-01-01), Kroft
patent: 4395763 (1983-07-01), Takahashi
patent: 4439829 (1984-03-01), Tsiang
patent: 4458310 (1984-07-01), Chang
patent: 4541046 (1985-09-01), Nagashima et al.
patent: 4594682 (1986-06-01), Drimak

Affiliated with

Also associated with

Rating

Cache store bypass for computer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cache store bypass for computer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cache store bypass for computer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-98651