Arithmetic device capable of obtaining high-accuracy...

Details Arithmetic device capable of obtaining high-accuracy... Arithmetic device capable of obtaining high-accuracy...

2011-03-29

2011-03-29

Mai, Tan V (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S552000

Reexamination Certificate

active

07917566

ABSTRACT:
A plurality of general-purpose registers each has a first bit width. A computing unit has a first and a second input end, at least the first input end having a second bit width wider than the first bit width, and performs an arithmetical operation on data supplied from the general-purpose registers to the first and second input ends. An overflow register having a bit width narrower than the first bit width holds data on figures overflowed as a result of calculation by the computing unit as overflow data and supplies the held overflow data as higher-order bits to at least one input end of the computing unit.

REFERENCES:
patent: 5402368 (1995-03-01), Yamada et al.
patent: 5508951 (1996-04-01), Ishikawa
patent: 6151616 (2000-11-01), Mahurin
patent: 6334135 (2001-12-01), Kabuo
patent: 7-146777 (1995-06-01), None
patent: 2001-109613 (2001-04-01), None

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