0380854-A2 is referenced by 65 patents and cites 3 patents.

An instruction buffer for a digital computer controls the flow of instruction stream to an instruction decoder (32). As each instruction is consumed, a shifter (70) removes the consumed bytes and repositions the remaining bytes into the lowest order positioned. The byte positions left empty are filled by instruction stream bytes retrieved from one of a pair of prefetch buffers (64, 66) or from a virtual instruction cache (28). One prefetch buffer (66) is filled from the instrction cache (28) after being emptied, but prior to those particular bytes being requested to fill the instruction decoder (32). The two-level prefetching allows the relatively slow process of cache access to be performed during noncritical time.

Title
Instruction buffer system for a digital computer.
Application Number
EP19890309274 19890913
Publication Number
0380854 (A2)
Application Date
September 13, 1989
Publication Date
August 8, 1990
Inventor
Murray John E
Manley Dwight P
Mckeon Michael M
Hetherington Ricky C
Fite David B
Assignee
Digital Equipment
US
IPC
G06F 09/38
G06F 09/38
G06F 09/30
G06F 09/38
G06F 09/30
View Original Source Download PDF