native code - definizione. Che cos'è native code
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Cosa (chi) è native code - definizione

SET OF INSTRUCTIONS EXECUTED DIRECTLY BY A COMPUTER'S CENTRAL PROCESSING UNIT (CPU)
Native code; Machine instruction; Machine Code; Machine language; Machine Language; Native applications; Native execution; Machine instruction (computing); Program machine code; Machine instructions; CPU instruction; CPU instructions; Opcode-level programming; Opcode level; Overlapping instructions; Overlapping instruction; Overlapping machine instructions; Overlapping machine instruction; Overlapping opcodes; Overlapping opcode; Overlapping opcode sequences; Overlapping opcode sequence; Overlapping op-codes; Overlapping op-code; Overlapping op-code sequences; Overlapping op-code sequence; Superpositioned code; Code superposition; Instruction overlapping; Code overlapping; Instruction scission; Opcode overlapping; Jump into the middle of instruction; Instruction overlapping technique; Jump in the middle; Jump into the middle of an instruction; Jumping into the middle of an instruction; Jumping into the middle of instruction; Code overlap; Overlapping code; Overlapped instruction encoding; Overlapped instruction; Overlapped instructions; Semantic code overlapping; Semantic overlapping (computing); Physical overlapping (computing); Physical code overlapping; Overlapped code; Code interleaving; Code outlining; Overlapping instruction sequences; Overlapping instruction sequence; Code-overlapping technique
  • code disassembly]], as well as processor register and memory dumps.

Native Son         
  • Native Son]]'' (1941), produced and directed by [[Orson Welles]]
NOVEL BY RICHARD WRIGHT (AUTHOR)
Native Son (novel)
Native Son (1940) is a novel written by the American author Richard Wright. It tells the story of 20-year-old Bigger Thomas, a black youth living in utter poverty in a poor area on Chicago's South Side in the 1930s.
Native Esperanto speakers         
  • Stela speaking the Esperanto language
PERSON WHO HAVE ACQUIRED ESPERANTO AS ONE OF THEIR NATIVE LANGUAGES
Denaskaj infanoj; Native Esperanto speaker; Native esperantist; Native Esperantist; Native Esperantists; Native esperanto speakers; List of native Esperanto speakers; Esperanto native speakers; List of Esperanto native speakers; Denaskuloj; Native speakers of Esperanto; Denaskulo
Native Esperanto speakers (Esperanto: denaskuloj or denaskaj esperantistoj) are people who have acquired Esperanto as one of their native languages. As of 1996, there were 350 or so attested cases of families with native Esperanto speakers.
Code (cryptography)         
  • A portion of the "[[Zimmermann Telegram]]" as decrypted by [[British Naval Intelligence]] codebreakers. The word ''Arizona'' was not in the German codebook and had therefore to be split into phonetic syllables.
METHOD USED TO ENCRYPT A MESSAGE
Codetext; Idiot code; One-part code; Two-part code; Cryptography code
In cryptology, a code is a method used to encrypt a message that operates at the level of meaning; that is, words or phrases are converted into something else. A code might transform "change" into "CVGDK" or "cocktail lounge".

Wikipedia

Machine code

In computer programming, machine code is computer code consisting of machine language instructions, which are used to control a computer's central processing unit (CPU). Each instruction causes the CPU to perform a very specific task, such as a load, a store, a jump, or an arithmetic logic unit (ALU) operation on one or more units of data in the CPU's registers or memory.

Early CPUs had specific machine code that might break backwards compatibility with each new CPU released. The notion of an instruction set architecture (ISA) defines and specifies the behavior and encoding in memory of the instruction set of the system, without specifying its exact implementation. This acts as an abstraction layer, enabling compatibility within the same family of CPUs, so that machine code written or generated according to the ISA for the family will run on all CPUs in the family, including future CPUs.

In general, each architecture family (e.g. x86, ARM) has its own ISA, and hence its own specific machine code language. There are exceptions, e.g. the IA-64 can emulate x86.

Machine code is a strictly numerical language, and is the lowest-level interface to the CPU intended for a programmer. There is, on some CPUs, a lower level interface in the form of (modifiable) microcode that implement the machine code. However, microcode is not intended to be changed by the end user on normal commercial CPUs. Assembly language provides a direct mapping between the numerical machine code and a human readable version where numerical opcodes and operands are replaced by readable strings (e.g. 0x90 is the NOP instruction on x86). While it is possible to write programs directly in machine code, managing individual bits and calculating numerical addresses and constants manually is tedious and error-prone. For this reason, programs are very rarely written directly in machine code in modern contexts, but may be done for low level debugging, program patching (especially when assembler source is not available) and assembly language disassembly.

The majority of practical programs today are written in higher-level languages or assembly language. The source code is then translated to executable machine code by utilities such as compilers, assemblers, and linkers, with the important exception of interpreted programs, which are not translated into machine code. However, the interpreter itself, which may be seen as an executor or processor performing the instructions of the source code, typically consists of directly executable machine code (generated from assembly or high-level language source code).

Machine code is by definition the lowest level of programming detail visible to the programmer, but internally many processors use microcode or optimise and transform machine code instructions into sequences of micro-ops. This is not generally considered to be a machine code.