Data dependency detection and handling in a microprocessor with

Details Data dependency detection and handling in a microprocessor with Data dependency detection and handling in a microprocessor with

1993-10-18

1995-11-28

Harrell, Robert B.

Boots, shoes, and leggings

364DIG2, 364DIG1, 3642318, 3642344, 36424341, 364964, 3649642, 395800, 395375, 395467, 395465, 395496, G06F 1300

Patent

active

054715989

ABSTRACT:
A superscalar superpipelined microprocessor having a write buffer located between the core and cache is disclosed. The write buffer is controlled to store the results of write operations to memory until such time as the cache becomes available, such as when no high-priority reads are to performed. The write buffer includes multiple entries that are split into two circular buffer sections for facilitating the interaction with the two pipelines of the core; cross-dependency tables are provided for each write buffer entry to ensure that the data is written from the write buffer to memory in program order, considering the possibility of prior data present in the opposite section. Non-cacheable reads from memory are also ordered in program order with the writing of data from the write buffer. Features for handling speculative execution, detecting and handling data dependencies and exceptions, and performing special write functions (misaligned writes and gathered writes) are also disclosed.

REFERENCES:
patent: 3916388 (1975-10-01), Shimp et al.
patent: 4131940 (1978-12-01), Moyer
patent: 4251864 (1981-02-01), Kindell et al.
patent: 4408275 (1983-10-01), Kubo et al.
patent: 4456955 (1984-06-01), Yanagita et al.
patent: 4580214 (1986-04-01), Kubo et al.
patent: 4594679 (1986-06-01), George et al.
patent: 4814976 (1989-03-01), Hansen et al.
patent: 4959771 (1990-09-01), Ardini, Jr. et al.
patent: 4961162 (1990-10-01), Nguyenphu et al.
patent: 4985825 (1991-01-01), Webb, Jr. et al.
patent: 4992938 (1991-02-01), Cocke et al.
patent: 4992977 (1991-02-01), Matoba et al.
patent: 5023776 (1991-06-01), Gregor
patent: 5073855 (1991-12-01), Staplin et al.
patent: 5075840 (1991-12-01), Grohoski et al.
patent: 5123097 (1992-06-01), Joyce et al.
patent: 5125083 (1992-06-01), Fite et al.
patent: 5125092 (1992-06-01), Prener
patent: 5142631 (1992-08-01), Murray et al.
patent: 5168561 (1992-12-01), Vo
patent: 5168571 (1992-12-01), Hoover et al.
patent: 5202972 (1993-04-01), Gusefski et al.
patent: 5222223 (1993-06-01), Webb et al.
patent: 5226126 (1993-07-01), McFarland et al.
patent: 5226169 (1993-07-01), Gregor
patent: 5291586 (1994-03-01), Jen et al.
patent: 5313613 (1994-05-01), Gregor

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