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| <title>Using as: XStormy16 Opcodes</title> |
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| Previous: <a href="XStormy16-Directives.html#XStormy16-Directives" accesskey="p" rel="prev">XStormy16 Directives</a>, Up: <a href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent" accesskey="u" rel="up">XSTORMY16-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="XStormy16-Pseudo_002dOpcodes"></a> |
| <h4 class="subsection">9.51.3 XStormy16 Pseudo-Opcodes</h4> |
| |
| <a name="index-XStormy16-pseudo_002dopcodes"></a> |
| <a name="index-pseudo_002dopcodes-for-XStormy16"></a> |
| <p><code>as</code> implements all the standard XStormy16 opcodes. |
| </p> |
| <p><code>as</code> also implements the following pseudo ops: |
| </p> |
| <dl compact="compact"> |
| <dd> |
| <a name="index-_0040lo-pseudo_002dop_002c-XStormy16"></a> |
| </dd> |
| <dt><code>@lo()</code></dt> |
| <dd><p>Computes the lower 16 bits of the given expression and stores it into |
| the immediate operand field of the given instruction. For example: |
| </p> |
| <p>‘<samp>add r6, @lo(here - there)</samp>’ |
| </p> |
| <p>computes the difference between the address of labels ’here’ and |
| ’there’, takes the lower 16 bits of this difference and adds it to |
| register 6. |
| </p> |
| <a name="index-_0040hi-pseudo_002dop_002c-XStormy16"></a> |
| </dd> |
| <dt><code>@hi()</code></dt> |
| <dd><p>Computes the higher 16 bits of the given expression and stores it into |
| the immediate operand field of the given instruction. For example: |
| </p> |
| <p>‘<samp>addc r7, @hi(here - there)</samp>’ |
| </p> |
| <p>computes the difference between the address of labels ’here’ and |
| ’there’, takes the upper 16 bits of this difference, shifts it down 16 |
| bits and then adds it, along with the carry bit, to the value in |
| register 7. |
| </p> |
| </dd> |
| </dl> |
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