74 lines
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74 lines
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HTML
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<title>Arguments - Using as</title>
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This file documents the GNU Assembler "as".
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<a name="Arguments"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Operators.html#Operators">Operators</a>,
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Up: <a rel="up" accesskey="u" href="Integer-Exprs.html#Integer-Exprs">Integer Exprs</a>
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<h4 class="subsection">6.2.1 Arguments</h4>
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<p><a name="index-expression-arguments-250"></a><a name="index-arguments-in-expressions-251"></a><a name="index-operands-in-expressions-252"></a><a name="index-arithmetic-operands-253"></a><dfn>Arguments</dfn> are symbols, numbers or subexpressions. In other
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contexts arguments are sometimes called “arithmetic operands”. In
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this manual, to avoid confusing them with the “instruction operands” of
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the machine language, we use the term “argument” to refer to parts of
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expressions only, reserving the word “operand” to refer only to machine
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instruction operands.
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<p>Symbols are evaluated to yield {<var>section</var> <var>NNN</var>} where
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<var>section</var> is one of text, data, bss, absolute,
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or undefined. <var>NNN</var> is a signed, 2's complement 32 bit
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integer.
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<p>Numbers are usually integers.
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<p>A number can be a flonum or bignum. In this case, you are warned
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that only the low order 32 bits are used, and <samp><span class="command">as</span></samp> pretends
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these 32 bits are an integer. You may write integer-manipulating
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instructions that act on exotic constants, compatible with other
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assemblers.
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<p><a name="index-subexpressions-254"></a>Subexpressions are a left parenthesis ‘<samp><span class="samp">(</span></samp>’ followed by an integer
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expression, followed by a right parenthesis ‘<samp><span class="samp">)</span></samp>’; or a prefix
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operator followed by an argument.
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</body></html>
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