Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2007-04-17
2007-04-17
An, Meng-Al T. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
09651159
ABSTRACT:
A method and apparatus for overflow detection and clamping with parallel operand processing for fixed-point multipliers is disclosed. The invention predicts when a multiplication of a number of operands will exceed a pre-determined number of bits based upon the fixed-point format of the operands. The prediction is performed in parallel with the multiplication of the operands. The multiplication need not be completed in full, but only to the extent to determine whether overflow exists. If an overflow detection occurs, clamping is instituted. The parallel operation of the overflow detection and the multiplication provides a faster clamping circuit than would otherwise be available from a serial multiplication followed by a clamping analysis.
REFERENCES:
patent: 3725649 (1973-04-01), Deerfield
patent: 4282581 (1981-08-01), Bondurant et al.
patent: 4811268 (1989-03-01), Nishitani et al.
patent: 5260890 (1993-11-01), Suzuki
patent: 5289396 (1994-02-01), Taniguchi
patent: 5369438 (1994-11-01), Kim
patent: 5448509 (1995-09-01), Lee et al.
patent: 5508951 (1996-04-01), Ishikawa
patent: 5539685 (1996-07-01), Otaguro
patent: 5745393 (1998-04-01), Wong
patent: 5745397 (1998-04-01), Nadehara
patent: 5844827 (1998-12-01), Wong
patent: 5847978 (1998-12-01), Ogura et al.
patent: 5889689 (1999-03-01), Alidina et al.
patent: 5907498 (1999-05-01), Rim
patent: 5936870 (1999-08-01), Im
patent: 5943249 (1999-08-01), Handlogten
patent: 5991843 (1999-11-01), Porterfield et al.
patent: 6037947 (2000-03-01), Nelson et al.
patent: 6061781 (2000-05-01), Jain et al.
patent: 6112220 (2000-08-01), Smith
patent: 6151616 (2000-11-01), Mahurin
patent: 6321248 (2001-11-01), Bonnet et al.
patent: 6499046 (2002-12-01), Nguyen et al.
patent: 6535900 (2003-03-01), Perets et al.
patent: 6629115 (2003-09-01), Rossignol
An Meng-Al T.
Do Chat C.
Micro)n Technology, Inc.
Whyte Hirschboeck Dudek SC
LandOfFree
Overflow detection and clamping with parallel operand... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Overflow detection and clamping with parallel operand..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Overflow detection and clamping with parallel operand... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3804370