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<title>NeL: NLPACS::CInt128 class Reference</title>
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<h1>NLPACS::CInt128 Class Reference</h1><code>#include <<a class="el" href="a05665.html">edge_collide.h</a>></code>
<p>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A 128 bits integer. <dl compact><dt><b>Author:</b></dt><dd>Lionel Berenguier <p>
Nevrax France </dd></dl>
<dl compact><dt><b>Date:</b></dt><dd>2001 </dd></dl>
<p>
<p>
Definition at line <a class="el" href="a05665.html#l00048">48</a> of file <a class="el" href="a05665.html">edge_collide.h</a>.<table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>bool </td><td class="memItemRight" valign=bottom><a class="el" href="a02684.html#NLPACS_1_1CInt128a0">operator<</a> (const <a class="el" href="a02684.html">CInt128</a> &o) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">compare 2 int128. <a href="#NLPACS_1_1CInt128a0"></a><br><br></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>bool </td><td class="memItemRight" valign=bottom><a class="el" href="a02684.html#NLPACS_1_1CInt128a1">operator==</a> (const <a class="el" href="a02684.html">CInt128</a> &o) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">compare 2 int128. <a href="#NLPACS_1_1CInt128a1"></a><br><br></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>void </td><td class="memItemRight" valign=bottom><a class="el" href="a02684.html#NLPACS_1_1CInt128a2">setMul</a> (<a class="el" href="a04558.html#a12">sint64</a> a, <a class="el" href="a04558.html#a12">sint64</a> b)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute a*b, and store in <a class="el" href="a02684.html">CInt128</a>. <a href="#NLPACS_1_1CInt128a2"></a><br><br></td></tr>
<tr><td colspan=2><br><h2>Data Fields</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a04558.html#a12">sint64</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02684.html#NLPACS_1_1CInt128o0">High</a></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a04558.html#a12">sint64</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02684.html#NLPACS_1_1CInt128o1">Low</a></td></tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="NLPACS_1_1CInt128a0" doxytag="NLPACS::CInt128::operator<" ></a><p>
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<td class="md" nowrap valign="top"> bool NLPACS::CInt128::operator< </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="a02684.html">CInt128</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>o</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const<code> [inline]</code></td>
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</td>
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<p>
compare 2 int128.
<p>
<p>
Definition at line <a class="el" href="a05665.html#l00099">99</a> of file <a class="el" href="a05665.html">edge_collide.h</a>.
<p>
References <a class="el" href="a05665.html#l00051">High</a>, and <a class="el" href="a05665.html#l00052">Low</a>.
<p>
<div class="fragment"><pre>00100 {
00101 <span class="keywordflow">if</span>(<a class="code" href="a02684.html#NLPACS_1_1CInt128o0">High</a>!=o.High)
00102 <span class="keywordflow">return</span> <a class="code" href="a02684.html#NLPACS_1_1CInt128o0">High</a><o.High;
00103 <span class="keywordflow">else</span>
00104 <span class="keywordflow">return</span> <a class="code" href="a02684.html#NLPACS_1_1CInt128o1">Low</a><o.Low;
00105 }
</pre></div> </td>
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<a class="anchor" name="NLPACS_1_1CInt128a1" doxytag="NLPACS::CInt128::operator==" ></a><p>
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<td class="md" nowrap valign="top"> bool NLPACS::CInt128::operator== </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="a02684.html">CInt128</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>o</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const<code> [inline]</code></td>
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<table cellspacing=5 cellpadding=0 border=0>
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<td>
</td>
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<p>
compare 2 int128.
<p>
<p>
Definition at line <a class="el" href="a05665.html#l00108">108</a> of file <a class="el" href="a05665.html">edge_collide.h</a>.
<p>
References <a class="el" href="a05665.html#l00051">High</a>, and <a class="el" href="a05665.html#l00052">Low</a>.
<p>
<div class="fragment"><pre>00109 {
00110 <span class="keywordflow">return</span> <a class="code" href="a02684.html#NLPACS_1_1CInt128o0">High</a>==o.High && <a class="code" href="a02684.html#NLPACS_1_1CInt128o1">Low</a>==o.Low;
00111 }
</pre></div> </td>
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</table>
<a class="anchor" name="NLPACS_1_1CInt128a2" doxytag="NLPACS::CInt128::setMul" ></a><p>
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<td class="md" nowrap valign="top"> void NLPACS::CInt128::setMul </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="a04558.html#a12">sint64</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="a04558.html#a12">sint64</a> </td>
<td class="mdname" nowrap> <em>b</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"><code> [inline]</code></td>
</tr>
</table>
</td>
</tr>
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<table cellspacing=5 cellpadding=0 border=0>
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<td>
</td>
<td>
<p>
Compute a*b, and store in <a class="el" href="a02684.html">CInt128</a>.
<p>
<p>
Definition at line <a class="el" href="a05665.html#l00057">57</a> of file <a class="el" href="a05665.html">edge_collide.h</a>.
<p>
References <a class="el" href="a05665.html#l00051">High</a>, <a class="el" href="a05665.html#l00052">Low</a>, <a class="el" href="a05981.html#l00104">sint</a>, <a class="el" href="a05981.html#l00101">sint64</a>, <a class="el" href="a05981.html#l00100">uint32</a>, and <a class="el" href="a05981.html#l00102">uint64</a>.
<p>
Referenced by <a class="el" href="a05665.html#l00151">NLPACS::CRational64::operator<()</a>, and <a class="el" href="a05665.html#l00161">NLPACS::CRational64::operator==()</a>.
<p>
<div class="fragment"><pre>00058 {
00059 <span class="comment">// reset and backup sign.</span>
00060 <a class="code" href="a04558.html#a14">sint</a> sgn=0;
00061 <span class="keywordflow">if</span>(a<0)
00062 sgn++, a=-a;
00063 <span class="keywordflow">if</span>(b<0)
00064 sgn--, b=-b;
00065
00066
00067 <span class="comment">// compute unsigned version.</span>
00068 <a class="code" href="a04558.html#a13">uint64</a> high, low, hl1, hl2, oldLow;
00069 <a class="code" href="a04558.html#a11">uint32</a> mask32= 0xFFFFFFFF;
00070 high= (a>>32) * (b>>32);
00071 low= (a&mask32) * (b&mask32);
00072 hl1= (a&mask32) * (b>>32);
00073 hl2= (a>>32) * (b&mask32);
00074 <span class="comment">// add/adc hl1.</span>
00075 oldLow= low;
00076 low+= (hl1&mask32) << 32;
00077 <span class="keywordflow">if</span>(low<oldLow)
00078 high++;
00079 high+= (hl1>>32);
00080 <span class="comment">// add/adc hl2.</span>
00081 oldLow= low;
00082 low+= (hl2&mask32) << 32;
00083 <span class="keywordflow">if</span>(low<oldLow)
00084 high++;
00085 high+= (hl2>>32);
00086
00087
00088 <span class="comment">// extend with sign.</span>
00089 <a class="code" href="a02684.html#NLPACS_1_1CInt128o0">High</a>= high;
00090 <a class="code" href="a02684.html#NLPACS_1_1CInt128o1">Low</a>= low;
00091 <span class="keywordflow">if</span>(sgn!=0)
00092 {
00093 <a class="code" href="a02684.html#NLPACS_1_1CInt128o0">High</a>= -<a class="code" href="a02684.html#NLPACS_1_1CInt128o0">High</a>;
00094 <a class="code" href="a02684.html#NLPACS_1_1CInt128o1">Low</a>= -<a class="code" href="a02684.html#NLPACS_1_1CInt128o1">Low</a>;
00095 }
00096 }
</pre></div> </td>
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<hr><h2>Field Documentation</h2>
<a class="anchor" name="NLPACS_1_1CInt128o0" doxytag="NLPACS::CInt128::High" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="a04558.html#a12">sint64</a> <a class="el" href="a02684.html#NLPACS_1_1CInt128o0">NLPACS::CInt128::High</a>
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</td>
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<p>
<p>
Definition at line <a class="el" href="a05665.html#l00051">51</a> of file <a class="el" href="a05665.html">edge_collide.h</a>.
<p>
Referenced by <a class="el" href="a05665.html#l00099">operator<()</a>, <a class="el" href="a05665.html#l00108">operator==()</a>, and <a class="el" href="a05665.html#l00057">setMul()</a>. </td>
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<a class="anchor" name="NLPACS_1_1CInt128o1" doxytag="NLPACS::CInt128::Low" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="a04558.html#a12">sint64</a> <a class="el" href="a02684.html#NLPACS_1_1CInt128o1">NLPACS::CInt128::Low</a>
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</td>
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<p>
<p>
Definition at line <a class="el" href="a05665.html#l00052">52</a> of file <a class="el" href="a05665.html">edge_collide.h</a>.
<p>
Referenced by <a class="el" href="a05665.html#l00099">operator<()</a>, <a class="el" href="a05665.html#l00108">operator==()</a>, and <a class="el" href="a05665.html#l00057">setMul()</a>. </td>
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="a05665.html">edge_collide.h</a></ul>
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