each assembly language is specific to a particular computer architecture and sometimes to an operating system. others may even do simple rearrangement or insertion of instructions, such as some assemblers for risc architectures that can help optimize a sensible instruction scheduling to exploit the cpu pipeline as efficiently as possible. in some assembly languages (including this one) the same mnemonic, such as mov, may be used for a family of related instructions for loading, copying and moving data, whether these are immediate values, values in registers, or memory locations pointed to by values in registers or by immediate (a/k/a direct) addresses.  transforming assembly language into machine code is the job of an assembler, and the reverse can at least partially be achieved by a disassembler. there is a large degree of diversity in the way the authors of assemblers categorize statements and in the nomenclature that they use. mnemonics are arbitrary symbols; in 1985 the ieee published standard 694 for a uniform set of mnemonics to be used by all assemblers.
judicious commenting is essential in assembly language programs, as the meaning and purpose of a sequence of binary machine instructions can be difficult to determine. the macro definition is most commonly[nb 4] a mixture of assembler statements, e.g., directives, symbolic machine instructions, and templates for assembler statements. in the macro: the intention was that the caller would provide the name of a variable, and the “global” variable or constant b would be used to multiply “a”. a curious design was a-natural, a “stream-oriented” assembler for 8080/z80, processors from whitesmiths ltd. (developers of the unix-like idris operating system, and what was reported to be the first commercial c compiler). there have always been debates over the usefulness and performance of assembly language relative to high-level languages. therefore, studying a single assembly language is sufficient to learn: i) the basic concepts; ii) to recognize situations where the use of assembly language might be appropriate; and iii) to see how efficient executable code can be created from high-level languages.
example: the following program illustrates some of the concepts discussed above. it stores a name ‘zara ali’ in the data. we’ll give examples written for nasm, masm and gas for both win32 and linux. we will even include a section on dos the example is to add var1 to eax . a basic rule in assembly language programming is that if you , assembly language programming pdf, assembly language programming pdf, assembly language programming 8086 examples, types of assembly language, assembly language tutorial.
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