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<a href="./Home">MLton 20130715</a>
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<h1>RunningOnSparc</h1>
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<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph"><p>MLton runs fine on the Sparc architecture.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_notes">Notes</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
When compiling for Sparc, MLton targets the 32-bit Sparc
architecture (i.e., Sparc V8).
</p>
</li>
<li>
<p>
When compiling for Sparc, MLton doesn’t support native code
generation (<span class="monospaced">-codegen native</span>). Hence, performance is not as good as
it might be and compile times are longer. Also, the quality of code
generated by <span class="monospaced">gcc</span> is important. By default, MLton calls <span class="monospaced">gcc -O1</span>.
You can change this by calling MLton with <span class="monospaced">-cc-opt -O2</span>. We have seen
this speed up some programs by as much as 30%, especially those
involving floating point; however, it can also more than double
compile times.
</p>
</li>
<li>
<p>
When compiling for Sparc, MLton uses <span class="monospaced">-align 8</span> by default. While
this speeds up reals, it also may increase object sizes. If your
program does not make significant use of reals, you might see a
speedup with <span class="monospaced">-align 4</span>.
</p>
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<div class="sect1">
<h2 id="_known_issues">Known issues</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Bootstrapping on the <a href="RunningOnSparc">Sparc architecture</a> is so slow
as to be impractical (many hours on a 500MHz UltraSparc). For this
reason, we strongly recommend building with a
<a href="CrossCompiling">cross compiler</a>.
</p>
</li>
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<h2 id="_also_see">Also see</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
<a href="RunningOnSolaris">RunningOnSolaris</a>
</p>
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