72 lines
2.7 KiB
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72 lines
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<title>MSP430-Macros - Using as</title>
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This file documents the GNU Assembler "as".
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<a name="MSP430-Macros"></a>
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<a name="MSP430_002dMacros"></a>
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<p>
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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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<h5 class="subsubsection">9.29.2.1 Macros</h5>
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<p><a name="index-Macros_002c-MSP-430-1739"></a><a name="index-MSP-430-macros-1740"></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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