doc/guide/localhost/RunningOnSparc

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  26 <h1>RunningOnSparc</h1>
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  29 <div id="preamble">
  30 <div class="sectionbody">
  31 <div class="paragraph"><p>MLton runs fine on the Sparc architecture.</p></div>
  32 </div>
  33 </div>
  34 <div class="sect1">
  35 <h2 id="_notes">Notes</h2>
  36 <div class="sectionbody">
  37 <div class="ulist"><ul>
  38 <li>
  39 <p>
  40 When compiling for Sparc, MLton targets the 32-bit Sparc
  41 architecture (i.e., Sparc V8).
  42 </p>
  43 </li>
  44 <li>
  45 <p>
  46 When compiling for Sparc, MLton doesn&#8217;t support native code
  47 generation (<span class="monospaced">-codegen native</span>).  Hence, performance is not as good as
  48 it might be and compile times are longer.  Also, the quality of code
  49 generated by <span class="monospaced">gcc</span> is important.  By default, MLton calls <span class="monospaced">gcc -O1</span>.
  50 You can change this by calling MLton with <span class="monospaced">-cc-opt -O2</span>.  We have seen
  51 this speed up some programs by as much as 30%, especially those
  52 involving floating point; however, it can also more than double
  53 compile times.
  54 </p>
  55 </li>
  56 <li>
  57 <p>
  58 When compiling for Sparc, MLton uses <span class="monospaced">-align 8</span> by default.  While
  59 this speeds up reals, it also may increase object sizes.  If your
  60 program does not make significant use of reals, you might see a
  61 speedup with <span class="monospaced">-align 4</span>.
  62 </p>
  63 </li>
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  67 <div class="sect1">
  68 <h2 id="_known_issues">Known issues</h2>
  69 <div class="sectionbody">
  70 <div class="ulist"><ul>
  71 <li>
  72 <p>
  73 Bootstrapping on the <a href="RunningOnSparc">Sparc architecture</a> is so slow
  74 as to be impractical (many hours on a 500MHz UltraSparc).  For this
  75 reason, we strongly recommend building with a
  76 <a href="CrossCompiling">cross compiler</a>.
  77 </p>
  78 </li>
  79 </ul></div>
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  81 </div>
  82 <div class="sect1">
  83 <h2 id="_also_see">Also see</h2>
  84 <div class="sectionbody">
  85 <div class="ulist"><ul>
  86 <li>
  87 <p>
  88 <a href="RunningOnSolaris">RunningOnSolaris</a>
  89 </p>
  90 </li>
  91 </ul></div>
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