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| <h4 class="subsection">6.2.1 Arguments</h4> |
| |
| <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 |
| contexts arguments are sometimes called “arithmetic operands”. In |
| this manual, to avoid confusing them with the “instruction operands” of |
| the machine language, we use the term “argument” to refer to parts of |
| expressions only, reserving the word “operand” to refer only to machine |
| instruction operands. |
| |
| <p>Symbols are evaluated to yield {<var>section</var> <var>NNN</var>} where |
| <var>section</var> is one of text, data, bss, absolute, |
| or undefined. <var>NNN</var> is a signed, 2's complement 32 bit |
| integer. |
| |
| <p>Numbers are usually integers. |
| |
| <p>A number can be a flonum or bignum. In this case, you are warned |
| that only the low order 32 bits are used, and <samp><span class="command">as</span></samp> pretends |
| these 32 bits are an integer. You may write integer-manipulating |
| instructions that act on exotic constants, compatible with other |
| assemblers. |
| |
| <p><a name="index-subexpressions-254"></a>Subexpressions are a left parenthesis ‘<samp><span class="samp">(</span></samp>’ followed by an integer |
| expression, followed by a right parenthesis ‘<samp><span class="samp">)</span></samp>’; or a prefix |
| operator followed by an argument. |
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