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Class Information
Number: 708/505
Name: Electrical computers: arithmetic processing and calculating > Electrical digital calculating computer > Particular function performed > Arithmetical operation > Floating point > Addition or subtraction
Description: Subject matter wherein the operation performed is addition or subtraction.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6529928 |
Floating-point adder performing floating-point and integer operations |
Mar. 4, 2003 |
| 6405232 |
Leading bit prediction with in-parallel correction |
Jun. 11, 2002 |
| 6397239 |
Floating point addition pipeline including extreme value, comparison and accumulate functions |
May. 28, 2002 |
| 6369610 |
Reconfigurable multiplier array |
Apr. 9, 2002 |
| 6327605 |
Data processor and data processing system |
Dec. 4, 2001 |
| 6301594 |
Method and apparatus for high-speed exponent adjustment and exception generation for normalization of floating-point numbers |
Oct. 9, 2001 |
| 6275839 |
Method and system for immediate exponent normalization in a fast floating point adder |
Aug. 14, 2001 |
| 6243732 |
Data processor and data processing system |
Jun. 5, 2001 |
| 6182104 |
Circuit and method of modulo multiplication |
Jan. 30, 2001 |
| 6178437 |
Method and apparatus for anticipating leading digits and normalization shift amounts in a floating-point processor |
Jan. 23, 2001 |
| 6175851 |
Fast adder/subtractor for signed floating point numbers |
Jan. 16, 2001 |
| 6148315 |
Floating point unit having a unified adder-shifter design |
Nov. 14, 2000 |
| 6148314 |
Round increment in an adder circuit |
Nov. 14, 2000 |
| 6148316 |
Floating point unit equipped also to perform integer addition as well as floating point to integer conversion |
Nov. 14, 2000 |
| 6130559 |
QMOS digital logic circuits |
Oct. 10, 2000 |
| 6128726 |
Accurate high speed digital signal processor |
Oct. 3, 2000 |
| 6115730 |
Reloadable floating point unit |
Sep. 5, 2000 |
| 6099158 |
Apparatus and methods for execution of computer instructions |
Aug. 8, 2000 |
| 6094668 |
Floating point arithmetic unit including an efficient close data path |
Jul. 25, 2000 |
| 6088715 |
Close path selection unit for performing effective subtraction within a floating point arithmetic unit |
Jul. 11, 2000 |
| 6085211 |
Logic circuit and floating-point arithmetic unit |
Jul. 4, 2000 |
| 6085212 |
Efficient method for performing close path subtraction in a floating point arithmetic unit |
Jul. 4, 2000 |
| 6078941 |
Computational structure having multiple stages wherein each stage includes a pair of adders and a multiplexing circuit capable of operating in parallel |
Jun. 20, 2000 |
| 6073150 |
Apparatus for directing a parallel processing computing device to form an absolute value of a signed value |
Jun. 6, 2000 |
| 6067556 |
Method and apparatus for adding floating point numbers in a data processing system |
May. 23, 2000 |
| 6061707 |
Method and apparatus for generating an end-around carry in a floating-point pipeline within a computer system |
May. 9, 2000 |
| 6038582 |
Data processor and data processing system |
Mar. 14, 2000 |
| 6018756 |
Reduced-latency floating-point pipeline using normalization shifts of both operands |
Jan. 25, 2000 |
| 5999961 |
Parallel prefix operations in asynchronous processors |
Dec. 7, 1999 |
| 5963461 |
Multiplication apparatus and methods which generate a shift amount by which the product of the significands is shifted for normalization or denormalization |
Oct. 5, 1999 |
| 5954790 |
Method and apparatus for parallel prediction and computation of massive cancellation in floating point subtraction |
Sep. 21, 1999 |
| 5923575 |
Method for eletronically representing a number, adder circuit and computer system |
Jul. 13, 1999 |
| 5917960 |
Image correlator, an image processing apparatus using the same, and a signal adder used in the image correlator |
Jun. 29, 1999 |
| 5901076 |
Ripple carry shifter in a floating point arithmetic unit of a microprocessor |
May. 4, 1999 |
| 5875123 |
Carry-select adder with pre-counting of leading zero digits |
Feb. 23, 1999 |
| 5867413 |
Fast method of floating-point multiplication and accumulation |
Feb. 2, 1999 |
| 5844827 |
Arithmetic shifter that performs multiply/divide by two to the nth power for positive and negative N |
Dec. 1, 1998 |
| 5838601 |
Arithmetic processing method and arithmetic processing device |
Nov. 17, 1998 |
| 5831884 |
Apparatus for performing arithmetic operation of floating point numbers capable of improving speed of operation by performing canceling prediction operation in parallel |
Nov. 3, 1998 |
| 5808926 |
Floating point addition methods and apparatus |
Sep. 15, 1998 |
| 5798958 |
Zero detect for binary sum |
Aug. 25, 1998 |
| 5798952 |
Leading bit anticipator |
Aug. 25, 1998 |
| 5793654 |
Saturating alignment shifter |
Aug. 11, 1998 |
| 5790445 |
Method and system for performing a high speed floating point add operation |
Aug. 4, 1998 |
| 5764556 |
Method and apparatus for performing floating point addition |
Jun. 9, 1998 |
| 5732007 |
Computer methods and apparatus for eliminating leading non-significant digits in floating point computations |
Mar. 24, 1998 |
| 5726927 |
Multiply pipe round adder |
Mar. 10, 1998 |
| 5726926 |
Shifter for shifting floating point number utilizing arithmetic operation of redundant binary number, and adder containing the same |
Mar. 10, 1998 |
| 5684729 |
Floating-point addition/substraction processing apparatus and method thereof |
Nov. 4, 1997 |
| 5677861 |
Arithmetic apparatus for floating-point numbers |
Oct. 14, 1997 |
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