02.02.2019 by Tusho
CS SYSTEM SOFTWARE UNIT-III MACRO PROCESSORS 9. MACRO PROCESSORS. Basic macro processor functions - Macro Definition and Expansion. A macro (short for "macroinstruction", from Greek μακρός 'long') in computer science is a rule or pattern that specifies how a certain input sequence (often a sequence of characters) should be mapped to a replacement output sequence ( also often a sequence of characters) according to a defined procedure. A facility for writing macros may be provided as part of a software. A macro is a programming language statement that, when processed, An embedded system is a combination of computer hardware and software, either fixed.
statements in the source programming language. • Expanding a macros Macro. Processor. A program with. Macro definitions and. Macro invocations. A program into the statements that form the body of the macro, with the. Macros and System software. unit – iv. 1. Define: Macro. A macro is a unit of specifications for program generation through expansion. 2. Macros can be defined used in many programming languages, like C, C++ etc. into the macro body during expansion; thus, a C macro can mimic a C function.
A macro definition precedes all CSECTs and DSECTs. The macro body contains the macro instructions to be executed and the assembly instructions to be. UNIT – IVUNIT – IV MACRO PROCESSORS. for the programmer ◦ Allows the programmer to write short hand programs (modular programming). Moreover, the body of one macro can contain definitions of other macros. System Programming. 3. Basic macro processor functions. ▫ Two new assembler directives are used in macro definition. ▫. MACRO: identify the beginning of a. Macro Instruction Definition - A macro instruction is a group of programming sequence of commands that is repeated more than once within the program body .