History-based carry predictor for data cache address generation

Details History-based carry predictor for data cache address generation History-based carry predictor for data cache address generation

2005-04-05

2005-04-05

Kim, Hong (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S213000, C711S214000, C711S202000, C711S104000, C711S003000, C711S220000, C708S710000, C708S670000, C712S211000

Reexamination Certificate

active

06877069

ABSTRACT:
An address translation logic and method for generating an instruction's operand address. The address generation logic includes an address generation circuit having adders that perform partial sum additions of the instruction operand's base register value with a displacement value in the instruction. The address generation logic also includes a carry prediction history block associated with the instruction that provides predicted carry-in values to the adders during the partial sum addition operation. In a related embodiment, the carry prediction history block that, in an advantageous embodiment, is appended to the instruction includes a predicted row access select (RAS) carry-in value, a predicted column access select (CAS) carry-in value and a confirmation flag that indicates whether the previous carry-in predictions for the previous predicted RAS and CAS carry-in values for the instruction were correct.

REFERENCES:
patent: 4578750 (1986-03-01), Amdahl et al.
patent: 4739470 (1988-04-01), Wada et al.
patent: 5097436 (1992-03-01), Zurawski
patent: 5297266 (1994-03-01), Tanaka
patent: 5713001 (1998-01-01), Eberhard et al.
patent: 5829049 (1998-10-01), Walker et al.
patent: 5860151 (1999-01-01), Austin et al.
patent: 6122320 (2000-09-01), Bellifemine et al.
patent: 6138223 (2000-10-01), Check et al.
patent: 6148318 (2000-11-01), Kawai et al.
patent: 6738890 (2004-05-01), Ishikawa et al.
patent: 20020184430 (2002-12-01), Ukai et al.

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