81 lines
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81 lines
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<title>XStormy16 Opcodes - Using as</title>
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<link rel="up" href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent" title="XSTORMY16-Dependent">
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<link rel="prev" href="XStormy16-Directives.html#XStormy16-Directives" title="XStormy16 Directives">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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or any later version published by the Free Software Foundation;
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<a name="XStormy16-Opcodes"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="XStormy16-Directives.html#XStormy16-Directives">XStormy16 Directives</a>,
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Up: <a rel="up" accesskey="u" href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent">XSTORMY16-Dependent</a>
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<hr>
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</div>
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<h4 class="subsection">9.54.3 XStormy16 Pseudo-Opcodes</h4>
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<p><a name="index-XStormy16-pseudo_002dopcodes-2598"></a><a name="index-pseudo_002dopcodes-for-XStormy16-2599"></a><code>as</code> implements all the standard XStormy16 opcodes.
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<p><code>as</code> also implements the following pseudo ops:
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<a name="index-g_t_0040code_007b_0040_0040lo_007d-pseudo_002dop_002c-XStormy16-2600"></a>
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<dl><dt><code>@lo()</code><dd>Computes the lower 16 bits of the given expression and stores it into
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the immediate operand field of the given instruction. For example:
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<p>‘<samp><span class="samp">add r6, @lo(here - there)</span></samp>’
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<p>computes the difference between the address of labels 'here' and
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'there', takes the lower 16 bits of this difference and adds it to
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register 6.
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<p><a name="index-g_t_0040code_007b_0040_0040hi_007d-pseudo_002dop_002c-XStormy16-2601"></a><br><dt><code>@hi()</code><dd>Computes the higher 16 bits of the given expression and stores it into
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the immediate operand field of the given instruction. For example:
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<p>‘<samp><span class="samp">addc r7, @hi(here - there)</span></samp>’
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<p>computes the difference between the address of labels 'here' and
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'there', takes the upper 16 bits of this difference, shifts it down 16
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bits and then adds it, along with the carry bit, to the value in
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register 7.
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</dl>
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<!-- Copyright (C) 2002-2019 Free Software Foundation, Inc. -->
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<!-- This is part of the GAS manual. -->
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<!-- For copying conditions, see the file as.texinfo. -->
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<!-- man end -->
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</body></html>
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