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Discontinued (e.g. 3DNow!, MPX, XOP) v. t. e. The x86 instruction set refers to the set of instructions that x86 -compatible microprocessors support. The instructions are usually part of an executable program, often stored as a computer file and executed on the processor.
In computer programming, assembly language (alternatively assembler language [1] or symbolic machine code), [2] [3] [4] often referred to simply as assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence between the instructions in the language and the architecture's machine code instructions. [5]
Base instruction. 0xFE 0x04. clt. Push 1 (of type int32) if value1 l ower than value2, else push 0. Base instruction. 0xFE 0x05. clt.un. Push 1 (of type int32) if value1 l ower than value2, un signed or un ordered, else push 0. Base instruction.
x86 assembly language has two main syntax branches: Intel syntax and AT&T syntax. [6] Intel syntax is dominant in the DOS and Windows world, and AT&T syntax is dominant in the Unix world, since Unix was created at AT&T Bell Labs. [7] Here is a summary of the main differences between Intel syntax and AT&T syntax:
The Common Intermediate Language is object-oriented and stack-based, which means that instruction parameters and results are kept on a single stack instead of in several registers or other memory locations, as in most programming languages. Code that adds two numbers in x86 assembly language, where eax and edx specify two different general ...
The assembly language decoding method is called disassembly. Machine code may be decoded back to its corresponding high-level language under two conditions: The first condition is to accept an obfuscated reading of the source code. An obfuscated version of source code is displayed if the machine code is sent to a decompiler of the source language.
This is a list of the instructions that make up the Java bytecode, an abstract machine language that is ultimately executed by the Java virtual machine. [ 1] The Java bytecode is generated from languages running on the Java Platform, most notably the Java programming language . Note that any referenced "value" refers to a 32-bit int as per the ...
v. t. e. In computer science, an instruction set architecture ( ISA) is an abstract model that generally defines how software controls the CPU in a computer or a family of computers. [1] A device or program that executes instructions described by that ISA, such as a central processing unit (CPU), is called an implementation of that ISA.