Otherwise, special care must be taken to branch around them so that the program will not attempt to execute something in a data area as an instruction.

For example, the subprogram in Euclid's algorithm to compute the remainder would execute much faster if the programmer had a " modulus " ( division ) instruction available rather than just subtraction ( or worse: just Minsky's " decrement ").

The CPU requires a fixed number of clock ticks ( or clock cycles ) to execute each instruction.

Many reported IPS values have represented " peak " execution rates on artificial instruction sequences with few branches, whereas realistic workloads consist of a mix of instructions and applications, some of which take longer to execute than others.

A complex instruction set computer ( CISC, ) is a computer where single instructions can execute several low-level operations ( such as a load from memory, an arithmetic operation, and a memory store ) and / or are capable of multi-step operations or addressing modes within single instructions.

For example, the same high-level task may require many more instructions on a RISC machine, but might execute faster than a single CISC instruction.

Decoding the opcode in the instruction register includes determining the instruction, determining where its operands are in memory, retrieving the operands from memory, allocating processor resources to execute the command ( in superscalar processors ), etc.

HP researchers investigated a new architecture, later named explicitly parallel instruction computing ( EPIC ), that allows the processor to execute multiple instructions in each clock cycle.

Pipelined MIPS, showing the five stages ( instruction fetch, instruction decode, execute, memory access and write back )

For example, z900, z990, System z9, and System z10 servers effectively execute result-oriented instructions twice, compare results, arbitrate between any differences ( through instruction retry and failure isolation ), then shift workloads " in flight " to functioning processors, including spares, without any impact to operating systems, applications, or users.

The Pentium is also able to execute a FXCH ST ( x ) instruction in parallel with an ordinary ( arithmetical or load / store ) FPU instruction.

Such mechanisms involve system calls, and usually invoke the OS's dispatcher code on exit, so they typically take hundreds of CPU instructions to execute, while masking interrupts may take as few as one instruction on some processors.

The term " reduced " in that phrase was intended to describe the fact that the amount of work any single instruction accomplishes is reduced — at most a single data memory cycle — compared to the " complex instructions " of CISC CPUs that may require dozens of data memory cycles in order to execute a single instruction.

The clock rate of a CPU is limited by the time it takes to execute the slowest sub-operation of any instruction ; decreasing that cycle-time often accelerates the execution of other instructions.

Others, like the Nx586 and AMD K5 did the same, but indirectly, via dynamic microcode buffering and semi-independent superscalar scheduling and instruction dispatch at the micro-operation level ( older or simpler ‘ CISC ’ designs typically execute rigid micro-operation sequences directly ).

These original RISC designs were minimalist, including as few features or op-codes as possible and aiming to execute instructions at a rate of almost one instruction per clock cycle.

There may be restrictions on which instructions can pair with which other instructions (" pairing " is the simultaneous execution of two or more instructions ), and which functional unit can execute which instruction.

Originally, it meant the contents of a writable control store ( a small specialized high speed memory ), containing microcode that defined and implemented the computer's instruction set, and that could be reloaded to specialize or modify the instructions that the central processing unit ( CPU ) could execute.

The loop is simple, so is duplicated in each handler, removing from the list of machine instructions needed to execute each interpreter instruction.

The programmer must translate the algorithm into a language that the simulator / computer / computor can effectively execute.

In computer science, the analysis of algorithms is the determination of the number of resources ( such as time and storage ) necessary to execute them.

* Executable, a type of binary file that contains machine code for the computer to execute

The computer would then execute the bootstrap program, which caused it to read more program instructions.

The program has an executable form that the computer can use directly to execute the instructions.

Computer software is so called to distinguish it from computer hardware, which encompasses the physical interconnections and devices required to store and execute ( or run ) the software.

Once the software has loaded, the computer is able to execute the software.

The program has an executable form that the computer can use directly to execute the instructions.

The idea of microprogramming was introduced by Maurice Wilkes in 1951 as an intermediate level to execute computer program instructions.

In these events, the computer system acted as it should in identifying a file and then, following the user ’ s orders to execute the file, exposed the computer and network to a harmful virus.

* Gulf of execution, a term usually used in human computer interaction to describe the gap between a user's goal for action and the means to execute that goal

The use of mathematical logic to represent and execute computer programs is also a feature of the lambda calculus, developed by Alonzo Church in the 1930s.

In computer programming, a p-code machine, or portable code machine is a virtual machine designed to execute p-code ( the assembly language of a hypothetical CPU ).

In computer science, a remote procedure call ( RPC ) is an inter-process communication that allows a computer program to cause a subroutine or procedure to execute in another address space ( commonly on another computer on a shared network ) without the programmer explicitly coding the details for this remote interaction.

The source code is automatically translated at some point to machine code that the computer can directly read and execute.

The IBM 5100 portable computer, introduced in 1975, offered an option to execute the System / 360's APL. SV programming language through a hardware emulator.

Users direct the operation of the computer by entering commands as text for a command line interpreter to execute or by creating text scripts of one or more such commands.

This architecture became popular for building inexpensive terminal parks for many users to simultaneously use the same large computer server to execute application programs as clients of each user's X terminal.

# Data processing by means of one or more devices that use common storage for all or part of a computer program, and also for all or part of the data necessary for execution of the program ; that execute user-written or user-designated programs ; that perform user-designated symbol manipulation, such as arithmetic operations, logic operation, or character string manipulations ; and that can execute programs that modify themselves during their execution.

Given BASIC's straightforward nature, it was a simple matter to type in the code from the magazine and execute the program.

Buffer overflows can be triggered by inputs that are designed to execute code, or alter the way the program operates.

The fundamental operation of most CPUs, regardless of the physical form they take, is to execute a sequence of stored instructions called a program.

The control unit does not execute program instructions ; rather, it directs other parts of the system to do so.

If the program is given to someone who speaks only English to execute the instructions of the program by hand, then in theory, the English speaker would also be able to carry on a conversation in written Chinese.

An implementation of a programming language provides a way to execute that program on one or more configurations of hardware and software.

This scan time may be a few milliseconds for a small program or on a fast processor, but older PLCs running very large programs could take much longer ( say, up to 100 ms ) to execute the program.

* attempting to execute a program that does not compile correctly.

In addition, a user is typically allowed to execute another shell program interactively.

Its purpose is to provide a platform-independent programming environment that abstracts away details of the underlying hardware or operating system, and allows a program to execute in the same way on any platform.

The most common requirement is to minimize the time taken to execute a program ; a less common one is to minimize the amount of memory occupied.