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70 lines
2.7 KiB
HTML
70 lines
2.7 KiB
HTML
15 years ago
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<title>MSP430-Macros - Using as</title>
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<meta name="description" content="Using as">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="MSP430-Syntax.html#MSP430-Syntax" title="MSP430 Syntax">
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<link rel="next" href="MSP430_002dChars.html#MSP430_002dChars" title="MSP430-Chars">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
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2006, 2007 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.1
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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man end-->
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<style type="text/css"><!--
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span.roman { font-family: serif; font-weight: normal; }
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--></style>
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</head>
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<body>
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<div class="node">
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<p>
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<a name="MSP430_002dMacros"></a>Next: <a rel="next" accesskey="n" href="MSP430_002dChars.html#MSP430_002dChars">MSP430-Chars</a>,
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Up: <a rel="up" accesskey="u" href="MSP430-Syntax.html#MSP430-Syntax">MSP430 Syntax</a>
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<hr><br>
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</div>
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<h5 class="subsubsection">9.24.2.1 Macros</h5>
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<p><a name="index-Macros_002c-MSP-430-1322"></a><a name="index-MSP-430-macros-1323"></a>The macro syntax used on the MSP 430 is like that described in the MSP
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430 Family Assembler Specification. Normal <code>as</code>
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macros should still work.
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<p>Additional built-in macros are:
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<dl>
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<dt><code>llo(exp)</code><dd>Extracts least significant word from 32-bit expression 'exp'.
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<br><dt><code>lhi(exp)</code><dd>Extracts most significant word from 32-bit expression 'exp'.
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<br><dt><code>hlo(exp)</code><dd>Extracts 3rd word from 64-bit expression 'exp'.
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<br><dt><code>hhi(exp)</code><dd>Extracts 4rd word from 64-bit expression 'exp'.
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</dl>
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<p>They normally being used as an immediate source operand.
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<pre class="smallexample"> mov #llo(1), r10 ; == mov #1, r10
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mov #lhi(1), r10 ; == mov #0, r10
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</pre>
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</body></html>
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