Jul 2, 2023 · A comment is a piece of regular text that the assembler just discards when turning assembly code into machine code. In assembly, comments are usually denoted by a semicolon ; , although GAS uses # for single line comments and /* …

Typical style is to just use # at the beginning of every line of a block-comment. In a .S file assembled by GCC or Clang, it will be run through the C preprocessor before assembling (unlike for lower-case .s) so you can also use // comment and even #if 0 / #endif to disable whole blocks, plus #define / #ifdef and all that.

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.

Choose an intended audience for your source code and write the comments to that audience. For assembly language source code, you can usually assume the target audience are those who know a reasonable amount of assembly language.

Add Comments to x86 Assembly Language Program . Assembly Programming. Example 1: Do not say that a function “computes the result of a1*b1 and then adds to it the result of a2*b2”. Instead say that the function “computes the vector product of A =[a1 a2] and B=[b1 b2]T”. Example 2: Do not say that “EAX is XORed with itself”.

Comments can contain any characters valid in the assembler language. Comments can be continued on more than one line by placing an asterisk in column 1 as shown in the following example. In this book, the comments field is not shown in …

Comments and documentation are critical in assembly language programming for several reasons: Readability: Assembly language is generally low-level, making it difficult to understand at a glance. Comments help in understanding what each part of the code does.

The following comment styles are recognized: ; The rest of the line is a comment (classic assembler comment) // Like ';', the rest of the line is a comment /* Block comment; the enclosed text is a comment, may span multiple lines.This style of comments cannot be nested.

Sep 16, 2021 · In assembly, comments are usually denoted by a semicolon ; although GAS uses # for single line comments and /* … */ for block comments possibly spanning multiple lines.

Jul 31, 2021 · The semicolon (;) is used to note program comments. Comments (using the ;) may be placed anywhere, including after an instruction. Any characters after the ; are ignored by the assembler. This can be used to explain steps taken in the …