Info Catalog
as: AArch64 Syntax
as: AArch64-Regs
9.1.3.1 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, the whole line is treated as a comment.
The ';' character can be used instead of a newline to separate
statements.
The '#' can be optionally used to indicate immediate operands.