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Computer science topic
In computer programming, a bitwise operation operates on a bit string, a bit array or a binary numeral (considered as a bit string) at the level of its
Bitwise_operation
Operations transforming individual bits of integral data types
programming language, operations can be performed on a bit level using bitwise operators. Bitwise operations are contrasted by byte-level operations which characterize
Bitwise_operations_in_C
Algorithmically modifying data below the word level
the bitwise operations: AND, OR, XOR, NOT, and possibly other operations analogous to the Boolean operators; there are also bit shifts and operations to
Bit_manipulation
True when either but not both inputs are true
exactly like addition modulo 2. Exclusive disjunction is often used for bitwise operations. Examples: 1 XOR 1 = 0 1 XOR 0 = 1 0 XOR 1 = 1 0 XOR 0 = 0 11102 XOR
Exclusive_or
Combinational digital circuit
(ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point
Arithmetic_logic_unit
Logical connective OR
exist in most programming languages. Disjunction is often used for bitwise operations. Examples: 0 or 0 = 0 0 or 1 = 1 1 or 0 = 1 1 or 1 = 1 1010 or 1100
Logical_disjunction
Data used for bitwise operations
In computer science, a mask or bitmask is data that is used for bitwise operations, particularly in a bit field. Using a mask, multiple bits in a byte
Mask_(computing)
Number expressed in the base-2 numeral system
string of binary symbols is manipulated in this way, it is called a bitwise operation; the logical operators AND, OR, and XOR may be performed on corresponding
Binary_number
Mathematical concept and applications in software development
subpatterns. In computer programming, a bitwise rotation, also known as a circular shift, is a bitwise operation that shifts all bits of its operand. Unlike
Circular_shift
Bitwise ternary logic (3-way boolean function)
Bitwise ternary logic instructions can logically implement all possible bitwise operations between three inputs (256 permutations). They take three registers
Bitwise ternary logic instruction
Bitwise_ternary_logic_instruction
Finite field of two elements
addition of this vector space is the bitwise operation called XOR (exclusive or). The bitwise AND is another operation on this vector space, which makes
GF(2)
Data structure in computer board games
architecture, single bitwise operators like AND and OR can be used to operate on the bitboard. These parallel bitwise operations can be much faster at
Bitboard
Type of computer instructions
mask is 8 bits. Find first set – Family of related bitwise operations on machine words Bitwise operation – Computer science topic Popcount – Number of nonzero
Bit_manipulation_instructions
Electronic circuit used to multiply binary numbers
to its 0th bit, inclusive, for a total of 8 bits. & symbol stands for a bitwise AND. In order to obtain our product, we then need to add up all eight of
Binary_multiplier
also be inferred if an initializer is provided. since C++26 Bitwise operations in C – Operations transforming individual bits of integral data types Bit manipulation –
Operators_in_C_and_C++
Search tree data structure
memory-intensive, various optimization techniques such as compression and bitwise representations have been developed to improve their efficiency. A notable
Trie
Data operation used in computer graphics
replaced bitwise operations with more general mathematical operations used for effects such as alpha compositing. This is because bitwise operations on color
Bit_blit
Shift operator in computer programming
shift and the arithmetic right shift. For binary numbers it is a bitwise operation that shifts all of the bits of its operand; every bit in the operand
Arithmetic_shift
Computational operation
the modulo of powers of 2 can alternatively be expressed as a bitwise AND operation (assuming x is a positive integer, or using a non-truncating definition):
Modulo
Topics referred to by the same term
Bit manipulation, algorithmic manipulation of binary digits (bits) Bitwise operation NOT, performing logical negation to a single bit, or each of several
Bit_flipping
Array data structure that compactly stores bits
bits, each bit in a word can be singled out and manipulated using bitwise operations. In particular: Use OR to set a bit to one: 11101010 OR 00000100 =
Bit_array
Binary arithmetic algorithm
shortened to XOR swap) is an algorithm that uses the exclusive or bitwise operation to swap the values of two variables without using the temporary variable
XOR_swap_algorithm
Bit-level computer operation
In computer science, a logical shift is a bitwise operation that shifts all the bits of its operand. The two base variants are the logical left shift
Logical_shift
Mathematical counting-out question
pp. 2403–2405. Robinson 1960, pp. 47–52. "Josephus Problem using Bitwise Operation (Java)". GitHub. January 7, 2018. Retrieved January 7, 2018. Park
Josephus_problem
Arithmetic logic circuit
fashion, with fewer digits. In this case, there are only four possible operations, 0+0, 0+1, 1+0 and 1+1; the 1+1 case generates a carry. Accordingly, all
Carry-lookahead_adder
Digital circuit that produces sums from inputs
addresses, table indices, increment and decrement operators and similar operations. Although adders can be constructed for many number representations, such
Adder_(electronics)
Function that is its own inverse
complementation involution, it is preserved under conversion. The XOR bitwise operation with a given value for one parameter is an involution on the other
Involution_(mathematics)
Instruction set extension by Intel
bitwise operations to be performed. These are the only bitwise vector instructions in AVX-512F; EVEX versions of the two source SSE and AVX bitwise vector
AVX-512
Efficient hardware implementation of a digital multiplier
Booth encoding Divider (÷) Binary Divider Division algorithm Bitwise ops Bitwise operation NOT AND OR XOR Bit shifts Bit manipulation See also Kochanski
Wallace_tree
Deliberate creation of difficult-to-understand code
obfuscation, an attacker chooses a secret key and applies the XOR bitwise operation to the malware binary. This transforms the executable into what looks
Obfuscation_(software)
Cryptographic attack
version runs in constant-time by testing all characters and using a bitwise operation to accumulate the result: #include <stddef.h> bool
Timing_attack
Tables comparing general and technical information for common hashes
subtraction; B: bitwise operation; L: lookup table; S: shift, rotation. It refers to byte endianness only. If the operations consist of bitwise operations and lookup
Comparison of cryptographic hash functions
Comparison_of_cryptographic_hash_functions
Method of representing a chessboard in software
(hexadecimal digit), and the bit gaps simplify a number of computations to bitwise operations. In the 0x88 board representation, the layout is spread out to cover
0x88
Unit of information
transmission with binary signalling. In programming languages such as C, a bitwise operation operates on binary strings as though they are vectors of bits, rather
Bit
Quickly accessible working storage available as part of a digital processor
into registers where they are used for arithmetic operations, bitwise operations, and other operations, and are manipulated or tested by machine instructions
Processor_register
Type of digital adder
which is effectively a sequence of multiplications, is the most common operation in public-key cryptography. Careful error analysis allows a choice to
Carry-save_adder
Arithmetic logic circuit
Booth encoding Divider (÷) Binary Divider Division algorithm Bitwise ops Bitwise operation NOT AND OR XOR Bit shifts Bit manipulation See also Kochanski
Kogge–Stone_adder
Comparison of two programming languages
datatype defined in <stdbool.h> (pre-C23). C allows using bitwise operators to perform Boolean operations. Care must be taken because the semantics are different
Comparison_of_Pascal_and_C
Toolkit for building GUI and command-line based operating systems
// rotate right by 4 bits Other bitwise operations are similar to arithmetic operations. DL & $08 // perform bitwise AND on DL with 0x08 and store the
Cosmos_(operating_system)
computation in which a random-access machine does arithmetic and bitwise operations on a word of w bits. Michael Fredman and Dan Willard created it in
Word_RAM
Processor flag indicating whether signed arithmetic overflow has occurred
exclusive or of the internal carry into and out of the sign bit. Bitwise operations (and, or, xor, not, rotate) do not have a notion of signed overflow
Overflow_flag
Boolean polynomials as sums of monomials
algebra on n generators because it lacks complementation (bitwise logical negation) as an operation (equivalently, because it lacks the top element as a constant)
Algebraic_normal_form
Expression in a computer program
and "!" (exclamation point) respectively, while the corresponding bitwise operations are represented by "|", "&" and "~" (tilde). In the mathematical literature
Boolean_expression
Approximate string matching algorithm
element of the pattern. Then it is able to do most of the work with bitwise operations, which are extremely fast. The bitap algorithm is perhaps best known
Bitap_algorithm
Logical connective AND
used for bitwise operations, where 0 corresponds to false and 1 to true: 0 AND 0 = 0, 0 AND 1 = 0, 1 AND 0 = 0, 1 AND 1 = 1. The operation can also
Logical_conjunction
Digital circuit implementation method
Booth encoding Divider (÷) Binary Divider Division algorithm Bitwise ops Bitwise operation NOT AND OR XOR Bit shifts Bit manipulation See also Kochanski
Carry-select_adder
Object which stores memory addresses in a computer program
or double-word boundary (but, requiring an additional "shift left" bitwise operation—by 1, 2 or 3 bits—in order to adjust the offset by a factor of 2,
Pointer (computer programming)
Pointer_(computer_programming)
Data structure that maps one or more adjacent bits
and change the bits in the field using combinations of masking and bitwise operations. Bit fields can be used inside structs in C and C++. #include <stdint
Bit_field
Data structure for approximate set membership
filters offer fast union and approximate intersection operations using cheap bitwise operations, which can also be applied to compressed bloom filters
Cuckoo_filter
Arithmetic logic circuit
Booth encoding Divider (÷) Binary Divider Division algorithm Bitwise ops Bitwise operation NOT AND OR XOR Bit shifts Bit manipulation See also Kochanski
Carry-skip_adder
Set of rules defining correctly structured programs
evaluates to 5, and (4 or 5) evaluates to 4. Python is able to do bitwise operations on integers, or binary numbers written with the 0b prefix. It uses
Python_syntax_and_semantics
Model that describes the programmable interface of a computer processor
decrement in some ISAs, saving operand fetch in trivial cases. Perform bitwise operations, e.g., taking the conjunction and disjunction of corresponding bits
Instruction_set_architecture
American technology company
Bitwise Industries was an American company focused on computer programming instruction, technology sales, and real estate operations. Founded in 2013 by
Bitwise_Industries
Programming language construct
evaluation. & and | are bitwise operators that occur in many programming languages. The major difference is that bitwise operations operate on the individual
Short-circuit_evaluation
Logical connective
false, in spite of p." Bitwise operation: P & ~Q. This is usually called "bit clear" (BIC) or "and not" (ANDN). Logical operation: P && !Q. Implication
Material_nonimplication
from external media. BASICs with Bitwise Ops use -1 as true and the AND and OR operators perform a bitwise operation on the arguments. FOR/NEXT skip means
List of computers with on-board BASIC
List_of_computers_with_on-board_BASIC
Parallel computing platform and programming model
downloads and readbacks to and from the GPU Full support for integer and bitwise operations, including integer texture lookups Whether for the host computer or
CUDA
Mapping function that preserves data point locality
0b010101} The sum and difference of two x values are calculated by using bitwise operations: x[i+j] = ((x[i] | 0b10101010) + x[j]) & 0b01010101 x[i−j] = ((x[i]
Z-order_curve
Circuit that performs subtraction
bits have negative weights, whereas the X and D bits are positive. The operation performed by the subtractor is to rewrite X i − Y i − B i {\displaystyle
Subtractor
Greatest integer less than or equal to square root
{s}, remainder = {r}") Some programming languages dedicate an explicit operation to the integer square root calculation in addition to the general case
Integer_square_root
Elementary cellular automaton
not actually based on Life. The state update can be done quickly by bitwise operations, if the cell values are represented by the bits within one (or more)
Rule_30
Arithmetic logic circuit
just buffering the gi's and pi's, and the black nodes are performing operation defined by operator ○, which is similar to a one bit adder. This tree-like
Brent–Kung_adder
Open source amateur radio mode
pseudorandom binary sequence created by combining an exclusive-or bitwise operation on the audio or data stream and a linear-feedback shift register using
M17_(amateur_radio)
Topics referred to by the same term
Scripting Language, a scripting language Logical shift left, a type of bitwise operation Larch Shared Language, a language for algebraic specification of abstract
LSL
Computing circuit
control unit decides which operations an ALU should perform (based on the op code being executed) and sets the ALU operation. The D input to the adder–subtractor
Adder–subtractor
Group of standard library class templates
{\displaystyle N} bits and a small amount of padding. It further supports bitwise operations, as well as accessing and modifying specific bits. It supports conversion
Sequence_container_(C++)
Computer memory unit using cascaded flip-flops
the same size or is one bit longer. Many computer languages include bitwise operations to "shift right" and "shift left" the data in a register, effectively
Shift_register
Database indexing technique
arrays (commonly called bitmaps) and answer queries by performing bitwise logical operations on these bitmaps. Bitmap indexes have a significant space and
Bitmap_index
Radio standard
pseudorandom binary sequence created by combining an exclusive-or bitwise operation on the audio or data stream and a linear-feedback shift register with
NXDN
Symbol connecting formulas in logic
operators over bit vectors (corresponding to finite Boolean algebras) are bitwise operations. But not every usage of a logical connective in computer programming
Logical_connective
Binary representation for signed numbers
done simply by inverting all bits in the number also known as the bitwise NOT operation) and then adding the one. Coincidentally, that intermediate number
Two's_complement
promoting the char value to an integer value before the operation. Thus, the result of a bitwise operation is a numeric type, not a character, in both languages
Comparison of C Sharp and Java
Comparison_of_C_Sharp_and_Java
Function in logic
Ludwig Wittgenstein, Tractatus Logico-Philosophicus, Proposition 5.101 Bitwise operation Binary function Boolean domain Boolean logic Boolean-valued function
Truth_function
Free and open-source calculator software
several functions for computer science, such as character encoding and bitwise operations. It provides four interfaces: two GUIs, one using GTK (qalculate-gtk)
Qalculate!
Intel microprocessor family
types of cores with regard to an undefined overflow flag in certain bitwise operations. Alder Lake's CPU topology has performance implications, especially
Alder_Lake
Text processor used with C and C++ and other programming tools
constants, arithmetic operators, comparison operators, logical operators, bitwise operations, the defined operator, and the # stringificafion operator. This allows
C_preprocessor
Random-access memory with processing elements integrated on the same chip
highest access parallelism but often perform only simple operations, such as bitwise operations on an entire memory row (e.g., DRISA) or sequential processing
Computational_RAM
Family of instruction set architectures
128 bits of memory data in a single instruction and also perform bitwise operations (although not integer arithmetic) on full 128-bits quantities in parallel
X86
Computation modulo a fixed integer
is often applied in bitwise operations and other operations involving fixed-width, cyclic data structures. The modulo operation, as implemented in many
Modular_arithmetic
Computing term meaning changing the state of a bit
languages implement bit inversion as an operation. For example, in JavaScript, bit inversion is known as a 'bitwise NOT' and is implemented as seen below:
Bit_inversion
Commercial hex editor and text editor for Microsoft Windows, Linux and macOS
C/C++/Java Code, Base64, Uuencoding, RTF, or HTML Arithmetic and bitwise operations on hex data Printing with header, footer and margin control Integrated
010_Editor
Topics referred to by the same term
mathematical logic, notated as "∧", "⋅", "&", or simple juxtaposition Bitwise AND, a Boolean operation in programming, typically notated as "and" or "&" Short-circuit
And
Mathematical operation with only one operand
mathematics, a unary operation is an operation with only one operand, i.e. a single input. This is in contrast to binary operations, which use two operands
Unary_operation
Programmable scientific calculator produced by Hewlett-Packard
length is fixed at 36 bits, and uses two's complement negation. Six bitwise operations are available: AND, OR, XOR, NOT, NAND, and NOR. The 35s's statistics
HP_35s
Data structure in chess programs for game state
piece resides. By excluding spaces occupied by friendly pieces (one bitwise operation), this yields the legal moves of the piece. However, the moves of
Board representation (computer chess)
Board_representation_(computer_chess)
Approach to public-key cryptography
performed efficiently by computers operating on binary numbers with bitwise operations. The curves over F p {\displaystyle \mathbb {F} _{p}} with pseudo-Mersenne
Elliptic-curve_cryptography
1985 video game
colour of the pixels of the character sprite is overlaid, using an XOR bitwise operation, with the colour of the superimposed object, resulting in a completely
Citadel_(video_game)
Set of cryptographic hash functions
"internal hash sum" after each compression of a data block. In the bitwise operations column, "Rot" stands for rotate no carry, and "Shr" stands for right
SHA-2
Data structure which is efficient to both store in memory and query
practice, the lookup table R p {\displaystyle R_{p}} can be replaced by bitwise operations and smaller tables that can be used to find the number of bits set
Succinct_data_structure
Performing order of mathematical operations
example, C++, Perl, and PHP) that it would have been preferable to move the bitwise operators above the comparison operators. Many programmers have become
Order_of_operations
A bitwise trie is a special form of trie where each node with its child-branches represents a bit sequence of one or more bits of a key. A bitwise trie
Bitwise_trie_with_bitmap
Parallel processing technique
used even on systems without special hardware support. Logical operations act bitwise, so act on each bit of a register independently. Using addition
SWAR
Data whose unit can take on only two possible states
collection of propositional variables. Boolean algebra operations are known as "bitwise operations" in computer science. Boolean functions are also well-studied
Binary_data
Instruction for x86 processors
In the x86 assembly language, the TEST instruction performs a bitwise AND on two operands. The flags SF, ZF, PF are modified while the numerical result
TEST_(x86_instruction)
Computer processor contained on an integrated-circuit chip
section. The ALU performs addition, subtraction, and bitwise operations such as AND or OR. Each operation of the ALU sets one or more flags in a status register
Microprocessor
System of digitally encoding numbers
the storage. Shifting and masking operations are used to pack or unpack a packed BCD digit. Other bitwise operations are used to convert a numeral to its
Binary-coded_decimal
Wiki-based programming chrestomathy
Abbreviations Ackermann function Amicable numbers Anagrams Bernoulli numbers Bitwise operations Cholesky decomposition Combinations Comments Continued fractions Cyclic
Rosetta_Code
Computer graphics term
allowed certain classes of image manipulation to be performed using bitwise operations (especially by a blitter chip), and parallax scrolling effects. Some
Bit_plane
Mathematical puzzle game
can be found elegantly from the binary representation of m using bitwise operations. To use the syntax of the C programming language, move m is: from
Tower_of_Hanoi
Artificial life software platform
Features" describes the evolution of a mathematical equals operation from simpler bitwise operations. The Avida-ED project (Avida-ED) uses the Avida software
Avida_(software)
BITWISE OPERATION
BITWISE OPERATION
Surname or Lastname
German and Dutch
German and Dutch : from Middle High German bloch, Middle Dutch blok ‘block of wood’, ‘stocks’. The surname probably originated as a nickname for a large, lumpish man, or perhaps as a nickname for a persistent lawbreaker who found himself often in the stocks.English : possibly a metonymic occupational name for someone who blocks, as in shoemaking and bookbinding, from Middle English blok ‘block’.Jewish (Ashkenazic) : Americanized spelling of Bloch (see Vlach).Adriaen Coertsz Block was a Dutch-born merchant-explorer who traded along the CT coast and Long Island shortly after Hudson’s voyage to the region in 1609. Block Island, between the north fork of Long Island and RI, which he used as a base of operations, is named after him.
Boy/Male
Arabic, Muslim
Method; Way; Mode; Manner; Operation; Process
Surname or Lastname
English (mainly East Anglia)
English (mainly East Anglia) : nickname for a lordly, impressive, or sharp-eyed man, from Middle English egle ‘eagle’ (from Old French aigle, from Latin aquila).English (of Norman origin) : habitational name from Laigle in Orne, France, the name of which ostensibly means ‘the eagle’, although it is possible that the recorded forms result from the operation of early folk etymology on some unknown original. Matilda de Aquila is recorded in 1129 as the widow of Robert Mowbray, Earl of Northumberland.Jewish : translation into English of Adler.
Surname or Lastname
English
English : from Middle English, Old French sur(ri)gien (from a derivative of Late Latin chirurgia ‘handiwork’), hence an occupational name for a person who performed operations, mostly amputations. Before the advent of anaesthetics, only crude surgery was possible, and the calling was often combined with that of the barber or bath house attendant.French : topographic name for someone who lived close to a gushing spring.
BITWISE OPERATION
BITWISE OPERATION
Girl/Female
Arabic, Muslim
Obedient; Compliant
Boy/Male
Christian, German, Latin
Ready for Battle; Noble
Boy/Male
Australian, Danish, French, German, Swedish, Teutonic
Victorious Peace; Victory; Peace; Protection
Girl/Female
Hindu
Male
Hindi/Indian
Variant spelling of Hindi Siddhartha, SIDDHARTA means "accomplished goal."
Girl/Female
Tamil
Milk, Amrit, Drink that makes one immortal
Boy/Male
Hindu, Indian
Lord of Meditation
Girl/Female
Tamil
Godly
Girl/Female
Spanish
loves horses.
Male
English
English surname transferred to forename use, JEFFERSON means "son of Jeffrey."
BITWISE OPERATION
BITWISE OPERATION
BITWISE OPERATION
BITWISE OPERATION
BITWISE OPERATION
n.
The act or operation of opening a vein for letting blood; bloodletting; phlebotomy.
v. t. & i.
To perforate (the skull) with a trepan, so as to remove a portion of the bone, and thus relieve the brain from pressure or irritation; to perform an operation with the trepan.
n.
The series or network of triangles into which the face of a country, or any portion of it, is divided in a trigonometrical survey; the operation of measuring the elements necessary to determine the triangles into which the country to be surveyed is supposed to be divided, and thus to fix the positions and distances of the several points connected by them.
n.
An operation for the repair of an injury or a defect in the walls of the urethra.
n.
A follower of Sabellius, a presbyter of Ptolemais in the third century, who maintained that there is but one person in the Godhead, and that the Son and Holy Spirit are only different powers, operations, or offices of the one God the Father.
n.
The clippings of metals made in various mechanical operations.
n.
That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations.
n.
The operation of gathering grapes.
n.
That which runs or flows; the quantity of a liquid which flows in a certain time or during a certain operation; as, the first running of a still.
n.
A straight, horizontal mark placed over two or more members of a compound quantity, which are to be subjected to the same operation, as in the expression x2 + y2 - x + y.
n.
The operation of removing the uvula.
n.
The plastic operation for closing a fissure in the hard palate.
v. t.
To be subjected to; to bear up against; to pass through; to endure; to suffer; to sustain; as, to undergo toil and fatigue; to undergo pain, grief, or anxiety; to undergothe operation of amputation; food in the stomach undergoes the process of digestion.
n.
The act or operation of moving in the manner of a worm; continuation of motion from one part to another; as, the vermiculation, or peristaltic motion, of the intestines.
n.
The act or operation of transferring the blood of one man or animal into the vascular system of another; also, the introduction of any fluid into the blood vessels, or into a cavity of the body from which it can readily be adsorbed into the vessels; intrafusion; as, the peritoneal transfusion of milk.
n.
A longitudinal strip projecting as a fin from an object, to strengthen it, or to enter a channel in another object and thereby prevent displacement sidwise but permit motion lengthwise; a spline.
n.
A stick with a hole in one end through which passes a loop, which can be drawn tightly over the upper lip or an ear of a horse. By twisting the stick the compression is made sufficiently painful to keep the animal quiet during a slight surgical operation.
n.
The operation of expelling one substance from another by heat, as sulphur or arsenic from ores, in a muffle.
adv.
Horizontally.
n.
Accumulated and established knowledge, which has been systematized and formulated with reference to the discovery of general truths or the operation of general laws; knowledge classified and made available in work, life, or the search for truth; comprehensive, profound, or philosophical knowledge.