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Class Information
Number: 708/210
Name: Electrical computers: arithmetic processing and calculating > Electrical digital calculating computer > Particular function performed > Determining number of like-valued bits in word
Description: Subject matter where the number of 1"s or the number of 0"s in a binary word is determined.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8560586 Linear bit counting implementations Oct. 15, 2013
8533246 Carry bucket-aware multiplication having bits with most significant bits set to zero Sep. 10, 2013
8495118 Tunable random bit generator with magnetic tunnel junction Jul. 23, 2013
8447796 Apparatus with a vector generation unit and encoder for receiving first and second inputs to generate at least significant zero (LSZ) May. 21, 2013
8327119 Apparatus and method for executing fast bit scan forward/reverse (BSR/BSF) instructions Dec. 4, 2012
8214414 Combined set bit count and detector logic Jul. 3, 2012
8037120 System and method for an efficient comparison operation of multi-bit vectors in a digital logic circuit Oct. 11, 2011
8015230 Fast modular zero sum and ones sum determination Sep. 6, 2011
8010586 Apparatus and method of generating DBI signal in semiconductor integrated circuit Aug. 30, 2011
8005880 Half width counting leading zero circuit Aug. 23, 2011
7958173 Population count approximation circuit and method thereof Jun. 7, 2011
7931190 Circuit and method for correlated inputs to a population count circuit Apr. 26, 2011
7603398 Data converter and a delay threshold comparator Oct. 13, 2009
7467150 Block-aware encoding of bitmap for bitmap index eliminating max-slot restriction Dec. 16, 2008
7139788 Multiplication logic circuit Nov. 21, 2006
7136888 Parallel counter and a logic circuit for performing multiplication Nov. 14, 2006
7116663 Multi-field classification using enhanced masked matching Oct. 3, 2006
6963887 Method and device for performing data pattern matching Nov. 8, 2005
6938061 Parallel counter and a multiplication logic circuit Aug. 30, 2005
6889235 Method and apparatus for quantifying the number of identical consecutive digits within a string May. 3, 2005
6883011 Parallel counter and a multiplication logic circuit Apr. 19, 2005
6795839 Method and device for computing the number of bits set to one in an arbitrary length word Sep. 21, 2004
6781528 Vector handling capable processor and run length encoding Aug. 24, 2004
6754685 Dynamic popcount/shift circuit Jun. 22, 2004
6665691 Circuit for detecting numbers equal to a power of two on a data bus Dec. 16, 2003
6636881 Binary data counter, area information extractor and huffman converter Oct. 21, 2003
6516330 Counting set bits in data words Feb. 4, 2003
6513053 Data processing circuit and method for determining the first and subsequent occurences of a predetermined value in a sequence of data bits Jan. 28, 2003
6434488 Alignment free methodology for rapid determination of differences between a test data set and known data sets Aug. 13, 2002
6430251 4-Bit population count circuit Aug. 6, 2002
6272511 Weightless binary N-tuple thresholding hierarchies Aug. 7, 2001
5995029 Parallel bit counter using bit sorters Nov. 30, 1999
5978827 Arithmetic processing Nov. 2, 1999
5948048 Systems, methods and program products for representing a binary word as two binary words having fewer binary ones Sep. 7, 1999
5841684 Method and apparatus for computer implemented constant multiplication with multipliers having repeated patterns including shifting of replicas and patterns having at least two digit positions Nov. 24, 1998
5831877 Bit searching through 8, 16, or 32 bit operands using a 32 bit data path Nov. 3, 1998
5734599 Performing a population count using multiplication Mar. 31, 1998
5717616 Computer hardware instruction and method for computing population counts Feb. 10, 1998
5682405 Ones density monitor Oct. 28, 1997
5675617 Synchronous protocol encoding and decoding method Oct. 7, 1997
5666547 Method and apparatus for framing a serial data stream Sep. 9, 1997
5619437 Parallel data counter circuit Apr. 8, 1997
5604689 Arithmetic logic unit with zero-result prediction Feb. 18, 1997
5602764 Comparing prioritizing memory for string searching in a data compression system Feb. 11, 1997
5570306 Method and apparatus for recognizing a bit pattern in a string of bits, altering the string of bits, and removing the alteration from the string of bits Oct. 29, 1996
5541865 Method and apparatus for performing a population count operation Jul. 30, 1996
5539683 Method and device for processing, and detecting a state of, binary data Jul. 23, 1996
5392229 Graphics processing apparatus with video memory for storing graphics data Feb. 21, 1995
5369605 Incremental search content addressable memory for increased data compression efficiency Nov. 29, 1994
5339447 Ones counting circuit, utilizing a matrix of interconnected half-adders, for counting the number of ones in a binary string of image data Aug. 16, 1994

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