as: PowerPC-Chars

 
 9.35.3.1 Special Characters
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 The presence of a '#' on a line indicates the start of a comment that
 extends to the end of the current line.
 
    If a '#' appears as the first character of a line then the whole line
 is treated as a comment, but in this case the line could also be a
 logical line number directive (SeeComments) or a preprocessor
 control command (SeePreprocessing).
 
    If the assembler has been configured for the ppc-*-solaris* target
 then the '!' character also acts as a line comment character.  This can
 be disabled via the '-mno-solaris' command-line option.
 
    The ';' character can be used to separate statements on the same
 line.