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Loop transformation technique
Loop unrolling, also known as loop unwinding, is a loop transformation technique that attempts to optimize a program's execution speed at the expense
Loop_unrolling
Implementation of loop unrolling in C
is a way of manually implementing loop unrolling by interleaving two syntactic constructs of C: the do-while loop and a switch statement. Its discovery
Duff's_device
Algorithm trading more space for lower time
higher program speed when applying loop unrolling. This technique makes the code longer for each iteration of a loop, but saves the computation time required
Space–time_tradeoff
Principle of software development
programming Database normalization and denormalization Disk mirroring Loop unrolling Redundancy (engineering) Rule of three (computer programming) Separation
Don't_repeat_yourself
Technique in computer programming to optimize loop execution
iterations will be divisible by the number of iterations we unroll. See the article on loop unrolling for more on solutions to this problem, but note that software
Software_pipelining
Case in parallel computing
other based on loop unrolling. This technique, used for conventional vector machines, tries to find and exploit SIMD parallelism at the loop level. It consists
Automatic_vectorization
Compiler that optimizes generated code
case with loop reversal. Loop unrolling Unrolling duplicates the body of the loop multiple times, to decrease the number of times the loop condition is
Optimizing_compiler
Open-source linear algebra library
cost model of floating point operations, the library performs its own loop unrolling and vectorization. Eigen itself can provide BLAS and a subset of LAPACK
Eigen_(C++_library)
advantages of unrolling with the overhead of repeating the loop.) Moreover, completely unrolling a loop is only possible for a limited number of loops: those
Zero-overhead_looping
File format used to present documents
Distiller). This is done by applying standard compiler techniques like loop unrolling, inlining and removing unused branches, resulting in code that is purely
safely interchange loops, dependence analysis is required. Loop splitting Loop skewing Loop fission and fusion Loop unrolling "Loop interchange" (PDF)
Loop_interchange
Framework for computer program optimization
supporting the polyhedral model Loop nest optimization Loop optimization Loop unrolling Loop tiling "The basic polytope method", tutorial by Martin Griebl containing
Polytope_model
Gradually typed dialect of Lua
preserving debugging information. Level 2 adds function inlining and loop unrolling. The bytecode uses a register-based virtual machine with approximately
Luau_(programming_language)
Programming paradigm in which many processes are executed simultaneously
parallelism is a vectorization technique based on loop unrolling and basic block vectorization. It is distinct from loop vectorization algorithms in that it can
Parallel_computing
Pejorative term for highly repetitive programming
programming is considered acceptable or necessary, such as for boilerplate, loop unrolling (when not supported automatically by the compiler), languages with limited
Copy-and-paste_programming
Program optimization approach in computing
issues were also similar to those encountered on the Itanium, requiring loop unrolling for upfront scheduling. The claim is that traditional object-oriented
Data-oriented_design
Programming paradigm based on applying and composing functions
overhead. This is achieved thanks to the compiler using loop unrolling, where each iteration of a loop, be it imperative or using iterators, is converted into
Functional_programming
Early American electromechanical computer (1944)
complex programs had to be physically lengthy. A program loop was accomplished by loop unrolling or by joining the end of the paper tape containing the
Harvard_Mark_I
Cross-platform programming language
and function inlining, tail recursion elimination, constant folding, loop unrolling and dead code elimination (DCE) to optimize the run-time performance
Haxe
American computer scientist (1932–2020)
important, and it covers key compiler techniques like procedure inlining, loop unrolling, common subexpression elimination, code motion, and peephole optimization
Frances_Allen
Metaprogramming technique
optimization. As another, more significant, example of compile-time loop unrolling, template metaprogramming can be used to create length-n vector classes
Template_metaprogramming
Increasing execution speed and reducing the overheads associated with loops
to run as many of the loop iterations as possible at the same time on a SIMD system. Unrolling – duplicates the body of the loop multiple times, in order
Loop_optimization
Rule for substituting a set input with a set output
facilities, for example allowing a block of code to be repeated N times for loop unrolling; but these have a completely different syntax from the actual assembly
Macro_(computer_science)
Computer programming language designed for digital image processing
from its execution schedule, i.e. code specifying the loop nesting, parallelization, loop unrolling and vector instruction. These two are usually interleaved
Halide_(programming_language)
Optimization replacing a function call with that function's source code
This is a similar issue to other code expanding optimizations such as loop unrolling, which also reduces number of instructions processed, but can decrease
Inline_expansion
Programming situation where an instruction refers to a prior instruction's data
performance. Loop transformations: In optimizing loops, compilers need to consider data dependencies to apply transformations like loop unrolling, fusion,
Data_dependency
dead code elimination alias analysis loop unrolling induction variable elimination loop-invariant code motion loop reversal Sunitha, K.V.N. (2013). Compiler
Vbcc
Instruction set extension by Intel
vectors for Intel targets. C/C++ compilers also automatically handle loop unrolling and preventing stalls in the pipeline in order to use AVX-512 most effectively
AVX-512
Improving the efficiency of software
optimization, platform-independent techniques are generic techniques (such as loop unrolling, reduction in function calls, memory efficient routines, reduction in
Program_optimization
Production of unnecessarily long, slow or wasteful program code
often conflicts with execution speed. Optimization strategies like Loop unrolling and function inlining can significantly improve runtime performance
Code_bloat
Linear algebra library for C++ programs
functionality and adds new optimization techniques as meta-tuning, e.g. loop unrolling of dynamically sized containers can be specified in the function call
Matrix_Template_Library
Virtual machine software
0.8 OpenJDK 1.8.0_262, 11.0.8 This release introduced a new Partial Loop Unrolling optimization for JIT compilation. Improved the G1GC-like garbage collection
GraalVM
Group of Fortran compilers
closely represents the source code. This includes loop interchange, loop fusion, loop unrolling, loop distribution, data prefetch, and more. The Intel
Intel_Fortran_Compiler
Technique that abstracts logical registers from physical registers
registers, which requires replicating the code in a process called loop unrolling, or utilising self-modifying code to change the operand targets in each
Register_renaming
the case of loop unrolling performed by C compilers, where a statement like: for (i = 0; i< 3 ; i++) c[i] = a[i] + b[i]; can be unrolled into: c[0] =
WebCL
Method of transferring program control to another part of a program
can be used for example by optimizing compilers or JIT compilers in loop unrolling. Use of branch tables and other raw data encoding was common in the
Branch_table
Optimization technique in computing
global code motion. It works by converting a loop to long straight-line code sequence using loop unrolling and static branch prediction. This process separates
Trace_scheduling
Tools for optimizing binary code
propagation, constant propagation, strength reduction, loop invariant code motion and loop unrolling. Target binaries had to be relinked to its custom version
Binary_optimizer
Messerschmitt in 1989. Unfolding in general program is as known as Loop unrolling. Unfolding has applications in designing high-speed and low-power ASIC
Unfolding (DSP implementation)
Unfolding_(DSP_implementation)
Comparison between two programming languages
Java 7. Inlining can allow for further optimisations like loop vectorisation or loop unrolling, resulting in a huge overall performance increase. In Java
Comparison_of_Java_and_C++
American semiconductor design company
code operations and, potentially, applies other optimizations such as loop unrolling: ld %r30,[%esp] // load from stack only once add %eax,%eax,%r30 add
Transmeta
lead to an inconsequential performance penalty due to the lack of an unrolled loop. Rather, it is a clarity antipattern, as in any non-trivial example
Loop-switch_sequence
Term in the field of AI
future state depends on the choice of action, thus the perception-action loop unrolled in time forms a causal bayesian network. Empowerment ( E {\displaystyle
Empowerment (artificial intelligence)
Empowerment_(artificial_intelligence)
Canadian computer programmer (born 1952)
award in 1997. While working at Lucasfilm, he created Duff's device, a loop unrolling mechanism in C. On August 22, 2006, the United States Patent and Trademark
Tom_Duff
Technique in computer software design
parallelization or another loop overhead reduction of the loop nests. (Nested loops occur when one loop is inside of another loop.) One classical usage is
Loop_nest_optimization
Modifications conceal functionality
hardware description language (HDL) description of a circuit (including loop unrolling, register renaming, etc.). A major shortcoming of the passive approaches
Hardware_obfuscation
information for the kernel function calls. Software pipelining and loop unrolling are supported. Branch penalties are avoided by predicated selects and
Stream_Processors,_Inc.
problem can be solved in part by loop unrolling. Because it does not matter which order the elements are added, the loop can be split into an arbitrary
Privatization (computer programming)
Privatization_(computer_programming)
compilers involved. ILNumerics approaches these limitations by performing loop unrolling, removal of bound checks on array accesses and cache optimizations.
ILNumerics
Programming language
supports formal specification through preconditions, postconditions, loop invariants, loop variants, termination specifications and read/write framing specifications
Dafny
Algorithms which recursively solve subproblems
efficiently. The generalized version of this idea is known as recursion "unrolling" or "coarsening", and various techniques have been proposed for automating
Divide-and-conquer_algorithm
Japanese hanging scrolls
are in themselves called jiku, and are used as grasps when rolling and unrolling the scroll. Other parts of the scroll include the jikubo referenced above
Kakemono
Loop: from e1 do s1 loop s2 until e2. Upon forward entry, assertion e1 must be true. s1 is executed. Then, test e2 is evaluated. If true, the loop terminates
Reversible programming language
Reversible_programming_language
Electric motor that produces a linear force
A linear motor is an electric motor that has had its stator and rotor "unrolled", thus it produces a linear force along its length, rather than a rotational
Linear_motor
Swedish game studio and publisher
stylized grimdark fantasy RPG (Silver ENNIE for Best Game 2020.) Tales from the Loop, a TTRPG set in an alternative 1980s and based on the work of visual artist
Free_League_Publishing
Line deployed by scuba divers for navigation
are wound on to a spool or a reel for storage, and are laid in situ by unrolling. The length of the distance line used is dependent on the plan for the
Distance_line
Kite system
is an airborne wind turbine consisting of a long string or loop of power kites. The loop or string of kites (the "ladder") would be launched in the air
Laddermill
Shearing operation
whole (the 'log') and one or more slices are taken from it without an unrolling/re-reeling process. In rewind slitting, the web is unwound and run through
Roll_slitting
Class of artificial neural network
Whye (eds.). Deriving the Recurrent Neural Network Definition and RNN Unrolling Using Signal Processing. Critiquing and Correcting Trends in Machine Learning
Recurrent_neural_network
Theory of time and consciousness posited by the French philosopher Henri Bergson
identified and experienced as pure mobility. The first is of two spools, one unrolling to represent the continuous flow of ageing as one feels oneself moving
Duration_(philosophy)
Layer of fabric at the lower edge of the sleeve of a garment
children's clothes by buying pants that are too long, cuffing the leg and then unrolling it as the child grows. Originally, however, it started as men rolling
Cuff
Rooted binary tree data structure
are encountered. The recursive version of the search can be "unrolled" into a while loop. On most machines, the iterative version is found to be more
Binary_search_tree
Shock wave from flying at the speed of sound
path on the ground following the aircraft's flight path, a bit like an unrolling red carpet, and hence known as the boom carpet. Its width depends on the
Sonic_boom
Computer programming paradigm
also be much more complex. An implementation of this paradigm can "unroll" a loop internally. This allows throughput to scale with chip complexity, easily
Stream_processing
Instrument for measuring, keeping or indicating time
Museum. ISBN 0-912947-01-2. OCLC 159866762. Yoder, Joella Gerstmeyer. Unrolling Time: Christiaan Huygens and the Mathematization of Nature. New York:
Clock
Algorithmic technique
Algorithms (2 ed). SIAM. pp. 81–82. Radu Rugina and Martin Rinard, "Recursion unrolling for divide and conquer programs," in Languages and Compilers for Parallel
Pairwise_summation
Fashion accessories worn on or around the neck
triangle. The long edge is rolled towards the point, leaving a portion unrolled. The neckerchief is then fastened around the neck with the ends either
Neckwear
American filmmaker (1943–1993)
Eastman House, Anthony Bannon. Wintercourse (1962) Ray Gun Virus (1966) Unrolling Event (Fluxfilm) (1966) Wristtrick (Fluxfilm) (1966) Dots 1 & 2 (Fluxfilm)
Paul_Sharits
Family of related bitwise operations on machine words
fixed (typically 8) and represents a time–space tradeoff. The loop may also be fully unrolled. But as a linear lookup, this approach is still O(n) in the
Find_first_set
Data structure with nodes pointing to the next node
"while node ≠ someNode" must be at the end of the loop. If the test was moved to the beginning of the loop, the procedure would fail whenever the list had
Linked_list
Block cipher
64, as each iteration of the loop does two Feistel-cipher rounds. To additionally improve speed, the loop can be unrolled by pre-computing the values of
XTEA
Japanese animation
Traveling storytellers narrated legends and anecdotes while the emakimono was unrolled from the right to left in chronological order, as a moving panorama. Kage-e
Anime
Low-level programming language family
arguments. This could be used to generate record-style data structures or "unrolled" loops, for example, or could generate entire algorithms based on complex
Assembly_language
1984 programming game
quickscanner attempts to catch its opponent early by using a very fast unrolled scanning loop. Quickscanning is an early-game strategy, and always requires some
Core_War
Prefabricated airfield surface
rolls could be joined at the edges by threading flat steel bar through loops in the ends of the rods. Sommerfeld tracking was used extensively by the
Sommerfeld_tracking
Microcontroller machine language
and DEC instructions do not modify the carry flag, so they may be used to loop over arbitrary-precision arithmetic operands. The CPC, SBC and SBCI (compare/subtract
Atmel_AVR_instruction_set
Technique in digital signal processing
multiplications and 4 N {\displaystyle 4\ N} additions/subtractions within the loop, as well as 4 multiplications and 4 final additions/subtractions, for a total
Goertzel_algorithm
Species of woodlouse
atmosphere as a byproduct. This decomposition often leads to a positive feedback loop as the warming atmosphere is a more favorable environment for the fungi and
Armadillidium_vulgare
Algorithm to multiply matrices
element-wise: Base case: if n = 1, set c11 ← c11 + t11 (or do a short loop, perhaps unrolled). Otherwise: Partition C into C11, C12, C21, C22. Partition T into
Matrix multiplication algorithm
Matrix_multiplication_algorithm
1851 novel by Herman Melville
from the ship but its line tangles. As Ahab stoops to free it, the line loops around his neck, ensnaring him against his nemesis and completing Fedallah's
Moby-Dick
1957 novel by Jack Kerouac
time, 1947, bop was going like mad all over America. The fellows at the Loop blew, but with a tired air, because bop was somewhere between its Charlie
On_the_Road
American museum in Chicago, Illinois
"Broadcast museum unrolls floor plans". Loop North News. Retrieved October 21, 2014. "Broadcast museum moves offices into new building". North Loop News. May
Museum of Broadcast Communications
Museum_of_Broadcast_Communications
Type of advertisement
in the grass along the runway and unrolled. Again, it will have to be checked. If one of the lines catches and loops itself around one of the rods, the
Aerial_advertising
Elastic object that stores mechanical energy
extension springs are designed to become longer under load. Their turns (loops) are normally touching in the unloaded position, and they have a hook, eye
Spring_(device)
Instrument that records seismic waves by measuring ground motions
an electronic negative feedback loop. The motion of the mass relative to the frame is measured, and the feedback loop applies a magnetic or electrostatic
Seismometer
Programming paradigm
the types of programs that can be created easily (e.g. those involving loops or recursion), as well as making it harder for users to reason effectively
Differentiable_programming
Techniques to protect against brute-force attack
to apply a cryptographic hash function or a block cipher repeatedly in a loop. For example, in applications where the key is used for a cipher, the key
Key_stretching
Compiler optimization technique
constraints on the number of iterations a loop is likely to execute is fundamentally useful when considering whether to unroll it or not, but such facts typically
Profile-guided_optimization
American architect (born 1956)
was asked to produce a sculpture that could move. He made a work that unrolled colored plastic sheets on the floor, and he became fascinated with kinetic
Chuck_Hoberman
Branch of machine learning
networks in which data flows from the input layer to the output layer without looping back. At first, the DNN creates a map of virtual neurons and assigns random
Deep_learning
Steel reinforcement
period of time. Roll reinforcement is usually prepared off-site and easily unrolled on site. Roll reinforcement placement has been applied successfully in
Rebar
1961 American crewed sub-orbital spaceflight
shepherd's-hook recovery pole and carefully threaded the crook through the recovery loop on top of the spacecraft. By this time Lewis had lowered the helicopter to
Mercury-Redstone_4
identify some tests that are true or false for A {\displaystyle A} , unroll loops and recursion, etc. The key difference between run-time specialization
Run-time algorithm specialization
Run-time_algorithm_specialization
Microcode in x86 Intel processors
in a REP swing operation loads the MS Loop Counter with the number of iterations remaining after the unrolled iterations are executed. … a small number
Intel_microcode
Machine that converts electrical energy into mechanical energy
mounted on their windings for rotor position sensing and low cost closed-loop commutator control. BLDC motors are commonly used where precise speed control
Electric_motor
Buoy towed by a scuba diver to indicate position
diver or equipment, and the reel or spool held away from the diver while unrolling. The diver should ensure slightly negative buoyancy to allow sufficient
Surface_marker_buoy
Substantial weighted near-vertical line with buoy
line so that it pays out smoothly and without snagging. These include unrolling from a reel and running out from a box, bucket or bag into which it was
Diving_shot
fixed many of these issues but also further optimized the code by unrolling small loops. For programs that used math extensively, the new library resulted
Turbo-BASIC_XL
liquid glucagon formulations for rescue treatment and bi-hormonal closed-loop pancreas." Curr Diab Rep. 2012 Dec;12(6):705-10. doi:10.1007/s11892-012-0320-5
Glucagon_rescue
Marine phylum of animals often with radial symmetries
sea lilies is limited to bending (their stems can bend) and rolling and unrolling their arms; a few species can relocate themselves on the seabed by crawling
Echinoderm
LOOP UNROLLING
LOOP UNROLLING
Surname or Lastname
English
English : possibly from the Old Norse personal name Tópi, Túpi, a short form of a personal name formed with þórr, name of the Norse god of thunder (see Thor) + a second element with initial b-, for example björn ‘bear’, ‘warrior’. On the other hand, the name is found mainly in Dorset and Devon, which are far from areas of Scandinavian settlement.
Boy/Male
Hebrew
God will multiply.
Boy/Male
Dutch, German, Hebrew
God will Multiply; God will Add
Boy/Male
Hindu, Indian
Look
Boy/Male
Indian, Sanskrit
Natural; Original; Innate; Simply; Loop
Boy/Male
Bengali, Indian
Loop; Autumn
Boy/Male
British, English
Barrel Maker
Surname or Lastname
English (Somerset)
English (Somerset) : habitational name from Look in Puncknowle, Dorset, named in Old English with lūce ‘enclosure’.English : possibly a variant of Luck 3.Northern English and Scottish : from a vernacular pet form of Lucas.Dutch (van Look) : topographic name from look ‘enclosure’ or habitational name from a place named with this word.Thomas Look (b. c. 1622) was in Lynn, MA, by 1646. His son, also called Thomas (b. 1646), moved to Martha’s Vineyard about 1670.
Surname or Lastname
North German
North German : habitational name from any of several places called Loose or Loosey.North German : from a short form of Nikolaus, German form of Nicholas.Dutch : nickname from the adjective loos ‘cunning’, ‘artful’, ‘guileful’.English : variant spelling of Loose.
Boy/Male
Arabic
The Biblical Lot is the English Language Equivalent
Girl/Female
Hindu
Look, Blessed with beauty, Shape, Beauty
Girl/Female
Gujarati, Hindu, Indian
Look
Girl/Female
Arabic, Muslim
Look
Girl/Female
Tamil
Look, Blessed with beauty, Shape, Beauty
Surname or Lastname
Dutch
Dutch : from a short form of the Germanic personal name Robrecht.Altered spelling of German Rupp.English : variant spelling of Roope.
Male
Dutch
, Jehovah's gift (or grace).
Boy/Male
Hindu
Flower
Surname or Lastname
English
English : metonymic occupational name for a cooper, from Middle English coupe ‘tub’, ‘container’ (see Cooper). In some cases the surname may have been derived from a pub or house sign.Dutch : from koop ‘purchase’, ‘bargain’, hence a nickname for a haggler or a metonymic occupational name for a merchant.
Male
French
French form of Latin Lupus, LOUP means "wolf."
Boy/Male
Hindu, Indian, Rajasthani, Sindhi, Traditional
Look; Beauty; Appearance
LOOP UNROLLING
LOOP UNROLLING
Girl/Female
English
beverage brandy used as a given name.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Marathi, Telugu
One who does Contemplation
Girl/Female
Arabic, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Muslim, Tamil
Gift of God
Boy/Male
Anglo, Australian, British, English
Falcon Trainer
Surname or Lastname
English
English : habitational name from any of several places named Whitchurch from having a ‘white’ (Old English hwīt) church, i.e. probably one built of stone, as for example in Dorset, Hampshire, Shropshire, and Somerset.
Boy/Male
Arabic
One who Didn't Gave Water to Prophet Mohammad to Drink
Boy/Male
Christian & English(British/American/Australian)
Residence Name
Girl/Female
French American
Boy/Male
Hindu, Indian, Traditional
Courage
Girl/Female
Indian
Precious, Priceless
LOOP UNROLLING
LOOP UNROLLING
LOOP UNROLLING
LOOP UNROLLING
LOOP UNROLLING
v. t.
To bind or fasten with hoops; as, to hoop a barrel or puncheon.
v. t.
To beat in the game of loo by winning every trick.
v. t.
To break over the poop or stern, as a wave.
n.
Expression of the eyes and face; manner; as, a proud or defiant look.
v. t.
To express or manifest by a look.
v. i.
To direct the attention (to something); to consider; to examine; as, to look at an action.
v. t.
To confine in a coop; hence, to shut up or confine in a narrow compass; to cramp; -- usually followed by up, sometimes by in.
v. t.
To influence, overawe, or subdue by looks or presence as, to look down opposition.
n.
Any one of several aquatic, wed-footed, northern birds of the genus Urinator (formerly Colymbus), noted for their expertness in diving and swimming under water. The common loon, or great northern diver (Urinator imber, or Colymbus torquatus), and the red-throated loon or diver (U. septentrionalis), are the best known species. See Diver.
v. t.
To look at; to turn the eyes toward.
n.
A curve of any kind in the form of a loop.
n.
Hence; Appearance; aspect; as, the house has a gloomy look; the affair has a bad look.
v. t.
To make a loop of or in; to fasten with a loop or loops; -- often with up; as, to loop a string; to loop up a curtain.
n.
See Loon, the bird.
n.
A ring; a circular band; anything resembling a hoop, as the cylinder (cheese hoop) in which the curd is pressed in making cheese.
n.
See 1st Loop.
pl.
of Trou-de-loup
v. t.
To let hang down; as, to lop the head.
n.
The act of looking; a glance; a sight; a view; -- often in certain phrases; as, to have, get, take, throw, or cast, a look.
v. i.
To seem; to appear; to have a particular appearance; as, the patient looks better; the clouds look rainy.