Floating point system that represents status flag...

Details Floating point system that represents status flag... Floating point system that represents status flag...

2008-07-01

2008-07-01

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07395297

ABSTRACT:
A floating point unit generates results in which status information generated for an operation is encoded within the resulting operand, instead of requiring a separate floating point status register for the status information. In one embodiment, a floating point operand data structure includes a first portion having floating point operand data and a second portion having embedded status information associated with at least one status condition of the operand data. The status condition may be determined from only the embedded status information. The status condition may also be associated with at least one floating point operation that generated the operand data structure. The outcome of a conditional floating point instruction may be based on the embedded status information without regard to contents of the floating point status register. The second portion of the data structure may also have at least one bit indicative of the status condition, such as an invalid operation status, an overflow status, an underflow status, a division by zero status, an infinity status, and an inexact status.

REFERENCES:
patent: 3725649 (1973-04-01), Deerfield
patent: 4777613 (1988-10-01), Shahan et al.
patent: 4788655 (1988-11-01), Nakayama et al.
patent: 4991131 (1991-02-01), Yeh et al.
patent: 5065352 (1991-11-01), Nakano
patent: 5126963 (1992-06-01), Fukasawa
patent: 5161117 (1992-11-01), Waggener, Jr.
patent: 5249149 (1993-09-01), Cocanougher et al.
patent: 5307303 (1994-04-01), Briggs et al.
patent: 5347481 (1994-09-01), Williams
patent: 5347482 (1994-09-01), Williams
patent: 5357237 (1994-10-01), Bearden et al.
patent: 5363321 (1994-11-01), Dao Trong et al.
patent: 5365465 (1994-11-01), Larson
patent: 5481489 (1996-01-01), Yanagida et al.
patent: 5570310 (1996-10-01), Smith
patent: 5666301 (1997-09-01), Makino
patent: 5748516 (1998-05-01), Goddard et al.
patent: 5812439 (1998-09-01), Hansen
patent: 5862066 (1999-01-01), Rossin et al.
patent: 5892697 (1999-04-01), Brakefield
patent: 5931943 (1999-08-01), Orup
patent: 5953241 (1999-09-01), Hansen et al.
patent: 5963461 (1999-10-01), Gorshtein et al.
patent: 5978901 (1999-11-01), Luedtke et al.
patent: 5995991 (1999-11-01), Huang et al.
patent: 6009511 (1999-12-01), Lynch et al.
patent: 6049865 (2000-04-01), Smith
patent: 6081823 (2000-06-01), Purcell et al.
patent: 6105047 (2000-08-01), Sharangpani et al.
patent: 6108772 (2000-08-01), Sharangpani
patent: 6131106 (2000-10-01), Steele, Jr.
patent: 6138135 (2000-10-01), Karp
patent: 6151669 (2000-11-01), Huck et al.
patent: 6189094 (2001-02-01), Hinds et al.
patent: 6205460 (2001-03-01), Steele, Jr.
patent: 6219685 (2001-04-01), Story
patent: 6256655 (2001-07-01), Ezer et al.
patent: 6286023 (2001-09-01), Purcell et al.
patent: 6286024 (2001-09-01), Yano et al.
patent: 6360189 (2002-03-01), Hinds et al.
patent: 6393555 (2002-05-01), Meier et al.
patent: 6490607 (2002-12-01), Oberman
patent: 6571265 (2003-05-01), Story
patent: 6594681 (2003-07-01), Prabhu
patent: 6629120 (2003-09-01), Walster et al.
patent: 6658443 (2003-12-01), Walster
patent: 6658444 (2003-12-01), Walster et al.
patent: 6697832 (2004-02-01), Kelley et al.
patent: 6732134 (2004-05-01), Rosenberg et al.
patent: 6789098 (2004-09-01), Dijkstra
patent: 2002/0194232 (2002-12-01), Walster
patent: 2003/0033335 (2003-02-01), Walster
Title: “Safe Treatment of Overflow and Underflow Conditions”, by Robert A. Fraley & J. Stephen Walther, Hewlett-Packard Co., pp. 1-5.
Title: “Vax Floating Point: A Solid Foundation for Numerical Computation”, by Mary Payne & Dileep Bhandarkar, Digital Equipment Corp., pp. 1-12.
Title: Lecture Notes on the Status of “IEEE Standard 754 for Binary Floating-Point Arithmetic”, by Prof. W, Kahan, May 31, 1996, pp. 1-30.
Title: “Interval Arithmetic Specification” by Dmitri Chiriaev & G. William Walster, Draft revised May 4, 1998, pp. 1-78.
Title: “IEEE Standard for Binary Floating-Point Arithmetic” IEEE Standard 754-1985, by Standards Committee of the IEEE Computer Society, The Institute of Electrical and Electronics Engineers, Inc., copyright 1985, pp. 1-14.
U.S. Appl. No. 10/320,547, filed Dec. 17, 2002, Steele, Jr.
U.S. Appl. No. 10/320,450, filed Dec. 17, 2002, Steele, Jr.
U.S. Appl. No. 10/028,375, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,579, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,580, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,581, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,582, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,583, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,584, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,585, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,586, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,587, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/0035,589, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,595, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,647, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,674, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,741, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/035,746, filed Dec. 28, 2001, Steele, Jr.
U.S. Appl. No. 10/036,133, filed Dec. 28, 2001, Steele, Jr.

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