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| <title>Using as: LM32-Modifiers</title> |
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| <a name="LM32_002dModifiers"></a> |
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| Next: <a href="LM32_002dChars.html#LM32_002dChars" accesskey="n" rel="next">LM32-Chars</a>, Previous: <a href="LM32_002dRegs.html#LM32_002dRegs" accesskey="p" rel="prev">LM32-Regs</a>, Up: <a href="LM32-Syntax.html#LM32-Syntax" accesskey="u" rel="up">LM32 Syntax</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="Relocatable-Expression-Modifiers-1"></a> |
| <h4 class="subsubsection">9.20.2.2 Relocatable Expression Modifiers</h4> |
| |
| <a name="index-LM32-modifiers"></a> |
| <a name="index-syntax_002c-LM32"></a> |
| |
| <p>The assembler supports several modifiers when using relocatable addresses |
| in LM32 instruction operands. The general syntax is the following: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">modifier(relocatable-expression) |
| </pre></div> |
| |
| <dl compact="compact"> |
| <dd><a name="index-symbol-modifiers-1"></a> |
| |
| </dd> |
| <dt><code>lo</code></dt> |
| <dd> |
| <p>This modifier allows you to use bits 0 through 15 of |
| an address expression as 16 bit relocatable expression. |
| </p> |
| </dd> |
| <dt><code>hi</code></dt> |
| <dd> |
| <p>This modifier allows you to use bits 16 through 23 of an address expression |
| as 16 bit relocatable expression. |
| </p> |
| <p>For example |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">ori r4, r4, lo(sym+10) |
| orhi r4, r4, hi(sym+10) |
| </pre></div> |
| |
| </dd> |
| <dt><code>gp</code></dt> |
| <dd> |
| <p>This modified creates a 16-bit relocatable expression that is |
| the offset of the symbol from the global pointer. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">mva r4, gp(sym) |
| </pre></div> |
| |
| </dd> |
| <dt><code>got</code></dt> |
| <dd> |
| <p>This modifier places a symbol in the GOT and creates a 16-bit |
| relocatable expression that is the offset into the GOT of this |
| symbol. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">lw r4, (gp+got(sym)) |
| </pre></div> |
| |
| </dd> |
| <dt><code>gotofflo16</code></dt> |
| <dd> |
| <p>This modifier allows you to use the bits 0 through 15 of an |
| address which is an offset from the GOT. |
| </p> |
| </dd> |
| <dt><code>gotoffhi16</code></dt> |
| <dd> |
| <p>This modifier allows you to use the bits 16 through 31 of an |
| address which is an offset from the GOT. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">orhi r4, r4, gotoffhi16(lsym) |
| addi r4, r4, gotofflo16(lsym) |
| </pre></div> |
| |
| </dd> |
| </dl> |
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