as: Expressions
6 Expressions
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An "expression" specifies an address or numeric value. Whitespace may
precede and/or follow an expression.
The result of an expression must be an absolute number, or else an
offset into a particular section. If an expression is not absolute, and
there is not enough information when 'as' sees the expression to know
its section, a second pass over the source program might be necessary to
interpret the expression--but the second pass is currently not
implemented. 'as' aborts with an error message in this situation.
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