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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]
In assembly language programming, the function prologue is a few lines of code at the beginning of a function, which prepare the stack and registers for use within the function. Similarly, the function epilogue appears at the end of the function, and restores the stack and registers to the state they were in before the function was called.
In the x86 assembly language, the TEST instruction performs a bitwise AND on two operands.The flags SF, ZF, PF are modified while the result of the AND is discarded. The OF and CF flags are set to 0, while AF flag is undefined.
In the x86 assembly language, the JMP instruction performs an unconditional jump. Such an instruction transfers the flow of execution by changing the program counter.There are a number of different opcodes that perform a jump; depending on whether the processor is in real mode or protected mode, and an override instruction is used, the instructions may take 16-bit, 32-bit, or segment:offset ...
x86 assembly language is a family of low-level programming languages that are used to produce object code for the x86 class of processors. These languages provide backward compatibility with CPUs dating back to the Intel 8008 microprocessor, introduced in April 1972.
Basic Assembly Language does not allow statement continuation. Later versions of the assembler indicate continuation by the appearance of any non-blank character in column 72 of the statement being continued. Basic Assembly Language requires that column 72 be blank. A "full-card comment" is indicated by an asterisk (*) in column 1.
It is also possible to write high-level programs using HLA, avoiding much of the tedium of low-level assembly language programming. Some assembly language programmers reject HLA out of hand [citation needed], because it allows programmers to do this. However, supporting both high-level and low-level programming gives any language an expanded ...
GOAL has extensive support for inlined assembly language code using a special rlet form, [1] allowing programs to freely mix assembly and higher-level constructs within one function. The GOAL compiler is implemented in Allegro Common Lisp. It supports a long term compiling listener session which gives the compiler knowledge about the state of ...