Assemble Comment Text For Free

You can insert comments into your assembly source code to enhance readability of your code. In GNU-syntax Arm assembly source, comments can be delimited using: C-style comments; text enclosed between ?/*? and ?*/? which may span multiple lines. C++-style comments; text appearing after ?//? on a line.

The first semicolon on a line marks the beginning of a comment except where the semicolon appears inside a string literal. The end of the line is the end of the comment. A comment alone is a valid line. The assembler ignores all comments.

A comment can be appended to a statement. The comment consists of the slash character (/) (ASCII 0x2F) followed by the text of the comment. The comment is terminated by the newline that terminates the statement.

You need the comments when debugging, for example, to check that you have a correct algorithm and to check that the assembly language code implements it correctly. There are generally four types of comments. convey how the subprogram gets its parameters.

You can insert comments into your assembly source code to enhance readability of your code. In GNU-syntax Arm assembly source, comments can be delimited using: C-style comments; text enclosed between ?/*? and ?*/? which may span multiple lines. C++-style comments; text appearing after ?//? on a line.

ARM Instructions. First, note that the assembler syntax is quite different from x86: To make a comment, use @ to start the comment. x86 uses a semicolon for this. // comments also work, unlike x86!

In assembly language, the symbol semicolon ?;? is used for representing a comment. An assembler ignores or discards everything written after a semicolon in the same line of code in a program, that is, the comments are ignored by the assembler and thus the given statement is True.

In assembly, comments are usually denoted by a semicolon ; , although GAS uses # for single line comments and /* ? */ for block comments possibly spanning multiple lines. Here is an example: xor rax, rax ; rax ? false ; divisibility by four test rcx, 3 ; are the two right-most bits set?

Comments are even more important in assembly language than they are in high-level languages.You need the comments when debugging, for example, to check that you have a correct algorithm and to check that the assembly language code implements it correctly. There are generally four types of comments.

For . s files, the actual assembler itself ( as ) only handles # as a comment character, for x86. For some other ISAs, GAS uses other comment characters, for example @ for ARM.