Node:Comments, Next:Symbol Intro, Previous:Whitespace, Up:Syntax
There are two ways of rendering comments to as
. In both
cases the comment is equivalent to one space.
Anything from /*
through the next */
is a comment.
This means you may not nest these comments.
/* The only way to include a newline ('\n') in a comment is to use this sort of comment. */ /* This sort of comment does not nest. */
Anything from the line comment character to the next newline
is considered a comment and is ignored. The line comment character is
;
for the AMD 29K family;
;
on the ARC;
@
on the ARM;
;
for the H8/300 family;
!
for the H8/500 family;
;
for the HPPA;
#
on the i386 and x86-64;
#
on the i960;
;
for the PDP-11;
;
for picoJava;
;
for Motorola PowerPC;
!
for the Hitachi SH;
!
on the SPARC;
#
on the m32r;
|
on the 680x0;
#
on the 68HC11 and 68HC12;
;
on the M880x0;
#
on the Vax;
!
for the Z8000;
#
on the V850;
see Machine Dependencies.
On some machines there are two different line comment characters. One character only begins a comment if it is the first non-whitespace character on a line, while the other always begins a comment.
The V850 assembler also supports a double dash as starting a comment that extends to the end of the line.
--
;
To be compatible with past assemblers, lines that begin with #
have a
special interpretation. Following the #
should be an absolute
expression (see Expressions): the logical line number of the next
line. Then a string (see Strings) is allowed: if present it is a
new logical file name. The rest of the line, if any, should be whitespace.
If the first non-whitespace characters on the line are not numeric,
the line is ignored. (Just like a comment.)
# This is an ordinary comment. # 42-6 "new_file_name" # New logical file name # This is logical line # 36.This feature is deprecated, and may disappear from future versions of
as
.