Method of performing signed operations with unsigned instruction

Details Method of performing signed operations with unsigned instruction Method of performing signed operations with unsigned instruction

Filed on

1997-06-12

Date issued

2000-07-04

Examiner

Coulter, Kenneth R.

Patent Class

Electrical computers: arithmetic processing and calculating

SubClass

Electrical digital calculating computer

SubSubClass

Particular function performed

Other Related Categories

708670, 708490, 712221, G06F 738

Type

Patent

Status

active

Patent number

060852070

Description

ABSTRACT:
A method for controlling a microprocessor to transform data from a signed format to an unsigned format so that the data can be processed by unsigned instructions. In particular, a subtraction between two signed numbers can be transformed into a subtraction between two unsigned numbers.

REFERENCES:
patent: 4935890 (1990-06-01), Funyu
patent: 5745125 (1998-04-01), Deering et al.
patent: 5801975 (1998-09-01), Thayer et al.
patent: 5941938 (1999-08-01), Thayer
Japanese Abstract No. 362224830; Ushinmei, Oct. 1987.
Japanese Abstract No. 405303498; Nakamura et al, Nov. 1993.

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