<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta name="robots" content="index,nofollow">



<title>RunningOnHPPA - MLton Standard ML Compiler (SML Compiler)</title>
<link rel="stylesheet" type="text/css" charset="iso-8859-1" media="all" href="common.css">
<link rel="stylesheet" type="text/css" charset="iso-8859-1" media="screen" href="screen.css">
<link rel="stylesheet" type="text/css" charset="iso-8859-1" media="print" href="print.css">


<link rel="Start" href="Home">


</head>

<body lang="en" dir="ltr">

<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-833377-1";
urchinTracker();
</script>
<table bgcolor = lightblue cellspacing = 0 style = "border: 0px;" width = 100%>
  <tr>
    <td style = "
		border: 0px;
		color: darkblue; 
		font-size: 150%;
		text-align: left;">
      <a class = mltona href="Home">MLton MLTONWIKIVERSION</a>
    <td style = "
		border: 0px;
		font-size: 150%;
		text-align: center;
		width: 50%;">
      RunningOnHPPA
    <td style = "
		border: 0px;
		text-align: right;">
      <table cellspacing = 0 style = "border: 0px">
        <tr style = "vertical-align: middle;">
      </table>
  <tr style = "background-color: white;">
    <td colspan = 3
	style = "
		border: 0px;
		font-size:70%;
		text-align: right;">
      <a href = "Home">Home</a>
      &nbsp;<a href = "Index">Index</a>
      &nbsp;
</table>
<div id="content" lang="en" dir="ltr">
MLton runs fine on the HPPA architecture. <h2 id="head-b05203cf89b60eb36609a1a8b7f3cafe0927486a">Known issues</h2>

    <ul>

    <li>
<p>
 When compiling for HPPA, MLton targets the 32-bit HPPA  architecture. 
</p>
</li>
    <li class="gap">
<p>
 When compiling for HPPA, MLton doesn't support native code  generation (<tt>-codegen&nbsp;native</tt>).  Hence, performance is not as  good as it might be and compile times are longer.  Also, the quality  of code generated by <tt>gcc</tt> is important.  By default, MLton calls  <tt>gcc&nbsp;-O1</tt>.  You can change this by calling MLton with   <tt>-cc-opt&nbsp;-O2</tt>.  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 class="gap">
<p>
 When compiling for HPPA, MLton uses <tt>-align&nbsp;8</tt> 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 <tt>-align&nbsp;4</tt>. 
</p>
</li>
</ul>

</div>



<p>
<hr>
Last edited on 2007-07-08 20:20:00 by <span title="c-71-57-91-146.hsd1.il.comcast.net"><a href="MatthewFluet">MatthewFluet</a></span>.
</body></html>
