Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent
1998-04-08
2000-09-19
Follansbee, John A.
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
708495, 708497, 708498, 708504, G06F 700
Patent
active
061226513
ABSTRACT:
Disclosed is a method and circuit for executing an overshifted rotate through carry instruction. The circuit and method generates an n-bit output operand and output carry flag which represents a result of rotating a combination of a first n-bit operand and a first carry flag by a selected number of bit positions in a selected direction. The selected number of bit positions correspond to a z-bit count. The n-bit output operand and output carry flag is generated by first rotating the combination of the first n-bit operand and the first carry flag in the selected direction by a first number of bit positions corresponding to the y significant bits of the z-bit rotation count. This results in a second n-bit operand and a second carry flag. Thereafter, a combination of the second n-bit operand and the second carry flag is rotated in a direction opposite of the selected direction by second number of bit positions corresponding to the x most significant bits of the z-bit rotation count. This results in the n-bit output operand and output carry flag.
REFERENCES:
patent: 4472788 (1984-09-01), Yamazaki
patent: 4490809 (1984-12-01), Ueda et al.
patent: 4631703 (1986-12-01), Sakamoto
patent: 4831571 (1989-05-01), Tokumaru
patent: 4839839 (1989-06-01), Tokumaru et al.
patent: 5262971 (1993-11-01), Yamaguchi
patent: 5379240 (1995-01-01), Byrne
patent: 5553010 (1996-09-01), Tanihira et al.
patent: 5652718 (1997-07-01), Thomson
patent: 5671166 (1997-09-01), Omote
patent: 5682339 (1997-10-01), Tam
patent: 5696954 (1997-12-01), Guttag
patent: 5726926 (1998-03-01), Makino
patent: 5822231 (1998-10-01), Wong et al.
patent: 5844828 (1998-12-01), Fujimura et al.
patent: 5991786 (1999-11-01), Mahurin
patent: 6006244 (1999-12-01), Mahurin
Advanced Micro Devices , Inc.
Follansbee John A.
Kivlin B. Noel
Whitmore Stacy
LandOfFree
Method and apparatus for performing overshifted rotate through c does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for performing overshifted rotate through c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for performing overshifted rotate through c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1083483