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<hr><h1>NLMISC::CFastMem Class Reference</h1>Functions for Fast Memory manipulation with Pentium-class processors.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="fast__mem_8h-source.html">fast_mem.h</a>></code>
<p>
<a href="classNLMISC_1_1CFastMem-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0>
<tr><td colspan=2><br><h2>Static Public Methods</h2></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="classNLMISC_1_1CFastMem.html#d0">precache</a> (const void *<a class="el" href="driver__opengl__extension__def_8h.html#a409">src</a>, <a class="el" href="memory__common_8h.html#a15">uint</a> nbytes)</td></tr>
<tr><td> </td><td><font size=-1><em>Fast precaching of memory in L1 cache using SSE or MMX where available (NB: others methods don't do the test) nbytes should not override 4K.</em> <a href="#d0">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void * </td><td valign=bottom><a class="el" href="classNLMISC_1_1CFastMem.html#d1">memcpySSE</a> (void *dst, const void *<a class="el" href="driver__opengl__extension__def_8h.html#a409">src</a>, size_t nbytes)</td></tr>
<tr><td> </td><td><font size=-1><em>Fast memcpy using SSE instructions: prefetchnta and movntq.</em> <a href="#d1">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="classNLMISC_1_1CFastMem.html#d2">precacheSSE</a> (const void *<a class="el" href="driver__opengl__extension__def_8h.html#a409">src</a>, <a class="el" href="memory__common_8h.html#a15">uint</a> nbytes)</td></tr>
<tr><td> </td><td><font size=-1><em>Fast precaching of memory in L1 cache using MMX/SSE instructions: movq and prefetchnta Result is typically 880 Mo/s (surely slower because of overhead).</em> <a href="#d2">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="classNLMISC_1_1CFastMem.html#d3">precacheMMX</a> (const void *<a class="el" href="driver__opengl__extension__def_8h.html#a409">src</a>, <a class="el" href="memory__common_8h.html#a15">uint</a> nbytes)</td></tr>
<tr><td> </td><td><font size=-1><em>Fast precaching of memory in L1 cache using MMX instructions only: movq Result is typically 720 Mo/s (surely slower because of overhead).</em> <a href="#d3">More...</a><em></em></font><br><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Functions for Fast Memory manipulation with Pentium-class processors.
<p>
From <a href="http://www.sgi.com/developers/technology/irix/resources/asc_cpu.html">http://www.sgi.com/developers/technology/irix/resources/asc_cpu.html</a> <dl compact><dt><b>
Author: </b><dd>
Lionel Berenguier , Nevrax France </dl><dl compact><dt><b>
Date: </b><dd>
2002 </dl>
<p>
<p>
Definition at line <a class="el" href="fast__mem_8h-source.html#l00044">44</a> of file <a class="el" href="fast__mem_8h-source.html">fast_mem.h</a>.<hr><h2>Member Function Documentation</h2>
<a name="d1" doxytag="NLMISC::CFastMem::memcpySSE"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
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<td class="md" nowrap valign="top"> void * NLMISC::CFastMem::memcpySSE </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname" nowrap> <em>dst</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const void * </td>
<td class="mdname" nowrap> <em>src</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>nbytes</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"><code> [static]</code></td>
</tr>
</table>
</td>
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<td>
</td>
<td>
<p>
Fast memcpy using SSE instructions: prefetchnta and movntq.
<p>
Can be called only if SSE and MMX is supported NB: Copy per block of 4K through L1 cache Result is typically 420 Mo/s instead of 150 Mo/s.
<p>
Definition at line <a class="el" href="fast__mem_8cpp-source.html#l00205">205</a> of file <a class="el" href="fast__mem_8cpp-source.html">fast_mem.cpp</a>.
<p>
References <a class="el" href="driver__opengl__extension__def_8h-source.html#l00820">src</a>. </td>
</tr>
</table>
<a name="d0" doxytag="NLMISC::CFastMem::precache"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void NLMISC::CFastMem::precache </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const void * </td>
<td class="mdname" nowrap> <em>src</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="memory__common_8h.html#a15">uint</a> </td>
<td class="mdname" nowrap> <em>nbytes</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"><code> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Fast precaching of memory in L1 cache using SSE or MMX where available (NB: others methods don't do the test) nbytes should not override 4K.
<p>
<p>
Definition at line <a class="el" href="fast__mem_8cpp-source.html#l00218">218</a> of file <a class="el" href="fast__mem_8cpp-source.html">fast_mem.cpp</a>.
<p>
References <a class="el" href="driver__opengl__extension__def_8h-source.html#l00820">src</a>. </td>
</tr>
</table>
<a name="d3" doxytag="NLMISC::CFastMem::precacheMMX"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void NLMISC::CFastMem::precacheMMX </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const void * </td>
<td class="mdname" nowrap> <em>src</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="memory__common_8h.html#a15">uint</a> </td>
<td class="mdname" nowrap> <em>nbytes</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"><code> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Fast precaching of memory in L1 cache using MMX instructions only: movq Result is typically 720 Mo/s (surely slower because of overhead).
<p>
Hence prefer <a class="el" href="classNLMISC_1_1CFastMem.html#d2">precacheSSE</a>() when available. nbytes should not override 4K
<p>
Definition at line <a class="el" href="fast__mem_8cpp-source.html#l00214">214</a> of file <a class="el" href="fast__mem_8cpp-source.html">fast_mem.cpp</a>.
<p>
References <a class="el" href="driver__opengl__extension__def_8h-source.html#l00820">src</a>. </td>
</tr>
</table>
<a name="d2" doxytag="NLMISC::CFastMem::precacheSSE"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void NLMISC::CFastMem::precacheSSE </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const void * </td>
<td class="mdname" nowrap> <em>src</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="memory__common_8h.html#a15">uint</a> </td>
<td class="mdname" nowrap> <em>nbytes</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"><code> [static]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Fast precaching of memory in L1 cache using MMX/SSE instructions: movq and prefetchnta Result is typically 880 Mo/s (surely slower because of overhead).
<p>
nbytes should not override 4K
<p>
Definition at line <a class="el" href="fast__mem_8cpp-source.html#l00210">210</a> of file <a class="el" href="fast__mem_8cpp-source.html">fast_mem.cpp</a>.
<p>
References <a class="el" href="driver__opengl__extension__def_8h-source.html#l00820">src</a>. </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="fast__mem_8h-source.html">fast_mem.h</a><li><a class="el" href="fast__mem_8cpp-source.html">fast_mem.cpp</a></ul>
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