79 lines
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79 lines
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<title>MMIX-Syntax - Using as</title>
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This file documents the GNU Assembler "as".
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<a name="MMIX-Syntax"></a>
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<a name="MMIX_002dSyntax"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="MMIX_002dmmixal.html#MMIX_002dmmixal">MMIX-mmixal</a>,
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Previous: <a rel="previous" accesskey="p" href="MMIX_002dExpand.html#MMIX_002dExpand">MMIX-Expand</a>,
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Up: <a rel="up" accesskey="u" href="MMIX_002dDependent.html#MMIX_002dDependent">MMIX-Dependent</a>
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<h4 class="subsection">9.28.3 Syntax</h4>
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<p>The assembly syntax is supposed to be upward compatible with that
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described in Sections 1.3 and 1.4 of ‘<samp><span class="samp">The Art of Computer
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Programming, Volume 1</span></samp>’. Draft versions of those chapters as well as other
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MMIX information is located at
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<a name="mmixsite"></a><a href="http://www-cs-faculty.stanford.edu/~knuth/mmix-news.html">http://www-cs-faculty.stanford.edu/~knuth/mmix-news.html</a>.
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Most code examples from the mmixal package located there should work
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unmodified when assembled and linked as single files, with a few
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noteworthy exceptions (see <a href="MMIX_002dmmixal.html#MMIX_002dmmixal">MMIX-mmixal</a>).
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<p>Before an instruction is emitted, the current location is aligned to the
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next four-byte boundary. If a label is defined at the beginning of the
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line, its value will be the aligned value.
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<p>In addition to the traditional hex-prefix ‘<samp><span class="samp">0x</span></samp>’, a hexadecimal number
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can also be specified by the prefix character ‘<samp><span class="samp">#</span></samp>’.
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<p>After all operands to an MMIX instruction or directive have been
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specified, the rest of the line is ignored, treated as a comment.
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<ul class="menu">
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<li><a accesskey="1" href="MMIX_002dChars.html#MMIX_002dChars">MMIX-Chars</a>: Special Characters
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<li><a accesskey="2" href="MMIX_002dSymbols.html#MMIX_002dSymbols">MMIX-Symbols</a>: Symbols
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<li><a accesskey="3" href="MMIX_002dRegs.html#MMIX_002dRegs">MMIX-Regs</a>: Register Names
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<li><a accesskey="4" href="MMIX_002dPseudos.html#MMIX_002dPseudos">MMIX-Pseudos</a>: Assembler Directives
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</ul>
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</body></html>
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