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+ <span class="siteSubtitle">Run on Thu May 31 16:29:39 2012<br />Reported on Thu May 31 16:36:30 2012</span>
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+</div>
+
+<div class="body_content"><br />
+<table class="file_summary"><tr><td class="h">Filename</td><td align="left"><a href="file:///opt/local/lib/perl5/5.14.2/integer.pm">/opt/local/lib/perl5/5.14.2/integer.pm</a></td></tr>
+<tr><td class="h">Statements</td><td align="left">Executed 5 statements in 16µs</td></tr></table>
+
+ <table id="subs_table" border="1" cellpadding="0" class="tablesorter">
+ <caption>Subroutines</caption>
+ <thead>
+ <tr>
+ <th>Calls</th>
+ <th><span title="Number of Places sub is called from">P</span></th>
+ <th><span title="Number of Files sub is called from">F</span></th>
+ <th>Exclusive<br />Time</th>
+ <th>Inclusive<br />Time</th>
+ <th>Subroutine</th>
+ </tr>
+ </thead>
+ <tbody>
+<tr><td class="c3">2</td><td class="c3">2</td><td class="c3">2</td><td class="c3"><span title="0.0%">6µs</span></td><td class="c3"><span title="0.0%">6µs</span></td><td class="sub_name"><span style="display: none;">integer::::import</span>integer::<a href="integer-pm-861-block.html#85">import</a></span></td></tr>
+<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">integer::::unimport</span>integer::<a href="integer-pm-861-block.html#89">unimport</a></span></td></tr>
+</tbody></table>
+ Call graph for these subroutines as a
+ <a href="http://en.wikipedia.org/wiki/Graphviz">Graphviz</a>
+ <a href="opt-local-lib-perl5-5-14-2-integer-pm.dot">dot language file</a>.
+
+ <table border="1" cellpadding="0">
+ <thead>
+ <tr><th>Line</th>
+ <th><span title="Number of statements executed">State<br />ments</span></th>
+ <th><span title="Time spend executing statements on the line,
+ excluding time spent executing statements in any called subroutines">Time<br />on line</span></th>
+ <th><span title="Number of subroutines calls">Calls</span></th>
+ <th><span title="Time spent in subroutines called (inclusive)">Time<br />in subs</span></th>
+ <th class="left_indent_header">Code</th>
+ </tr>
+
+ </thead>
+ <tbody>
+ <tr><td class="h"><a name="1"></a>1</td><td></td><td></td><td></td><td></td><td class="s">package integer;</td></tr>
+<tr><td class="h"><a name="2"></a>2</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="3"></a>3</td><td class="c3">1</td><td class="c3"><span title="Avg 600ns">600ns</span></td><td></td><td></td><td class="s">our $VERSION = '1.00';</td></tr>
+<tr><td class="h"><a name="4"></a>4</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="5"></a>5</td><td></td><td></td><td></td><td></td><td class="s">=head1 NAME</td></tr>
+<tr><td class="h"><a name="6"></a>6</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="7"></a>7</td><td></td><td></td><td></td><td></td><td class="s">integer - Perl pragma to use integer arithmetic instead of floating point</td></tr>
+<tr><td class="h"><a name="8"></a>8</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="9"></a>9</td><td></td><td></td><td></td><td></td><td class="s">=head1 SYNOPSIS</td></tr>
+<tr><td class="h"><a name="10"></a>10</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="11"></a>11</td><td></td><td></td><td></td><td></td><td class="s"> use integer;</td></tr>
+<tr><td class="h"><a name="12"></a>12</td><td></td><td></td><td></td><td></td><td class="s"> $x = 10/3;</td></tr>
+<tr><td class="h"><a name="13"></a>13</td><td></td><td></td><td></td><td></td><td class="s"> # $x is now 3, not 3.33333333333333333</td></tr>
+<tr><td class="h"><a name="14"></a>14</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="15"></a>15</td><td></td><td></td><td></td><td></td><td class="s">=head1 DESCRIPTION</td></tr>
+<tr><td class="h"><a name="16"></a>16</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="17"></a>17</td><td></td><td></td><td></td><td></td><td class="s">This tells the compiler to use integer operations from here to the end</td></tr>
+<tr><td class="h"><a name="18"></a>18</td><td></td><td></td><td></td><td></td><td class="s">of the enclosing BLOCK. On many machines, this doesn't matter a great</td></tr>
+<tr><td class="h"><a name="19"></a>19</td><td></td><td></td><td></td><td></td><td class="s">deal for most computations, but on those without floating point</td></tr>
+<tr><td class="h"><a name="20"></a>20</td><td></td><td></td><td></td><td></td><td class="s">hardware, it can make a big difference in performance.</td></tr>
+<tr><td class="h"><a name="21"></a>21</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="22"></a>22</td><td></td><td></td><td></td><td></td><td class="s">Note that this only affects how most of the arithmetic and relational</td></tr>
+<tr><td class="h"><a name="23"></a>23</td><td></td><td></td><td></td><td></td><td class="s">B<operators> handle their operands and results, and B<not> how all</td></tr>
+<tr><td class="h"><a name="24"></a>24</td><td></td><td></td><td></td><td></td><td class="s">numbers everywhere are treated. Specifically, C<use integer;> has the</td></tr>
+<tr><td class="h"><a name="25"></a>25</td><td></td><td></td><td></td><td></td><td class="s">effect that before computing the results of the arithmetic operators</td></tr>
+<tr><td class="h"><a name="26"></a>26</td><td></td><td></td><td></td><td></td><td class="s">(+, -, *, /, %, +=, -=, *=, /=, %=, and unary minus), the comparison</td></tr>
+<tr><td class="h"><a name="27"></a>27</td><td></td><td></td><td></td><td></td><td class="s">operators (<, <=, >, >=, ==, !=, <=>), and the bitwise operators (|, &,</td></tr>
+<tr><td class="h"><a name="28"></a>28</td><td></td><td></td><td></td><td></td><td class="s">^, <<, >>, |=, &=, ^=, <<=, >>=), the operands have their fractional</td></tr>
+<tr><td class="h"><a name="29"></a>29</td><td></td><td></td><td></td><td></td><td class="s">portions truncated (or floored), and the result will have its</td></tr>
+<tr><td class="h"><a name="30"></a>30</td><td></td><td></td><td></td><td></td><td class="s">fractional portion truncated as well. In addition, the range of</td></tr>
+<tr><td class="h"><a name="31"></a>31</td><td></td><td></td><td></td><td></td><td class="s">operands and results is restricted to that of familiar two's complement</td></tr>
+<tr><td class="h"><a name="32"></a>32</td><td></td><td></td><td></td><td></td><td class="s">integers, i.e., -(2**31) .. (2**31-1) on 32-bit architectures, and</td></tr>
+<tr><td class="h"><a name="33"></a>33</td><td></td><td></td><td></td><td></td><td class="s">-(2**63) .. (2**63-1) on 64-bit architectures. For example, this code</td></tr>
+<tr><td class="h"><a name="34"></a>34</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="35"></a>35</td><td></td><td></td><td></td><td></td><td class="s"> use integer;</td></tr>
+<tr><td class="h"><a name="36"></a>36</td><td></td><td></td><td></td><td></td><td class="s"> $x = 5.8;</td></tr>
+<tr><td class="h"><a name="37"></a>37</td><td></td><td></td><td></td><td></td><td class="s"> $y = 2.5;</td></tr>
+<tr><td class="h"><a name="38"></a>38</td><td></td><td></td><td></td><td></td><td class="s"> $z = 2.7;</td></tr>
+<tr><td class="h"><a name="39"></a>39</td><td></td><td></td><td></td><td></td><td class="s"> $a = 2**31 - 1; # Largest positive integer on 32-bit machines</td></tr>
+<tr><td class="h"><a name="40"></a>40</td><td></td><td></td><td></td><td></td><td class="s"> $, = ", ";</td></tr>
+<tr><td class="h"><a name="41"></a>41</td><td></td><td></td><td></td><td></td><td class="s"> print $x, -$x, $x + $y, $x - $y, $x / $y, $x * $y, $y == $z, $a, $a + 1;</td></tr>
+<tr><td class="h"><a name="42"></a>42</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="43"></a>43</td><td></td><td></td><td></td><td></td><td class="s">will print: 5.8, -5, 7, 3, 2, 10, 1, 2147483647, -2147483648</td></tr>
+<tr><td class="h"><a name="44"></a>44</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="45"></a>45</td><td></td><td></td><td></td><td></td><td class="s">Note that $x is still printed as having its true non-integer value of</td></tr>
+<tr><td class="h"><a name="46"></a>46</td><td></td><td></td><td></td><td></td><td class="s">5.8 since it wasn't operated on. And note too the wrap-around from the</td></tr>
+<tr><td class="h"><a name="47"></a>47</td><td></td><td></td><td></td><td></td><td class="s">largest positive integer to the largest negative one. Also, arguments</td></tr>
+<tr><td class="h"><a name="48"></a>48</td><td></td><td></td><td></td><td></td><td class="s">passed to functions and the values returned by them are B<not> affected</td></tr>
+<tr><td class="h"><a name="49"></a>49</td><td></td><td></td><td></td><td></td><td class="s">by C<use integer;>. E.g.,</td></tr>
+<tr><td class="h"><a name="50"></a>50</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="51"></a>51</td><td></td><td></td><td></td><td></td><td class="s"> srand(1.5);</td></tr>
+<tr><td class="h"><a name="52"></a>52</td><td></td><td></td><td></td><td></td><td class="s"> $, = ", ";</td></tr>
+<tr><td class="h"><a name="53"></a>53</td><td></td><td></td><td></td><td></td><td class="s"> print sin(.5), cos(.5), atan2(1,2), sqrt(2), rand(10);</td></tr>
+<tr><td class="h"><a name="54"></a>54</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="55"></a>55</td><td></td><td></td><td></td><td></td><td class="s">will give the same result with or without C<use integer;> The power</td></tr>
+<tr><td class="h"><a name="56"></a>56</td><td></td><td></td><td></td><td></td><td class="s">operator C<**> is also not affected, so that 2 ** .5 is always the</td></tr>
+<tr><td class="h"><a name="57"></a>57</td><td></td><td></td><td></td><td></td><td class="s">square root of 2. Now, it so happens that the pre- and post- increment</td></tr>
+<tr><td class="h"><a name="58"></a>58</td><td></td><td></td><td></td><td></td><td class="s">and decrement operators, ++ and --, are not affected by C<use integer;></td></tr>
+<tr><td class="h"><a name="59"></a>59</td><td></td><td></td><td></td><td></td><td class="s">either. Some may rightly consider this to be a bug -- but at least it's</td></tr>
+<tr><td class="h"><a name="60"></a>60</td><td></td><td></td><td></td><td></td><td class="s">a long-standing one.</td></tr>
+<tr><td class="h"><a name="61"></a>61</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="62"></a>62</td><td></td><td></td><td></td><td></td><td class="s">Finally, C<use integer;> also has an additional affect on the bitwise</td></tr>
+<tr><td class="h"><a name="63"></a>63</td><td></td><td></td><td></td><td></td><td class="s">operators. Normally, the operands and results are treated as</td></tr>
+<tr><td class="h"><a name="64"></a>64</td><td></td><td></td><td></td><td></td><td class="s">B<unsigned> integers, but with C<use integer;> the operands and results</td></tr>
+<tr><td class="h"><a name="65"></a>65</td><td></td><td></td><td></td><td></td><td class="s">are B<signed>. This means, among other things, that ~0 is -1, and -2 &</td></tr>
+<tr><td class="h"><a name="66"></a>66</td><td></td><td></td><td></td><td></td><td class="s">-5 is -6.</td></tr>
+<tr><td class="h"><a name="67"></a>67</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="68"></a>68</td><td></td><td></td><td></td><td></td><td class="s">Internally, native integer arithmetic (as provided by your C compiler)</td></tr>
+<tr><td class="h"><a name="69"></a>69</td><td></td><td></td><td></td><td></td><td class="s">is used. This means that Perl's own semantics for arithmetic</td></tr>
+<tr><td class="h"><a name="70"></a>70</td><td></td><td></td><td></td><td></td><td class="s">operations may not be preserved. One common source of trouble is the</td></tr>
+<tr><td class="h"><a name="71"></a>71</td><td></td><td></td><td></td><td></td><td class="s">modulus of negative numbers, which Perl does one way, but your hardware</td></tr>
+<tr><td class="h"><a name="72"></a>72</td><td></td><td></td><td></td><td></td><td class="s">may do another.</td></tr>
+<tr><td class="h"><a name="73"></a>73</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="74"></a>74</td><td></td><td></td><td></td><td></td><td class="s"> % perl -le 'print (4 % -3)'</td></tr>
+<tr><td class="h"><a name="75"></a>75</td><td></td><td></td><td></td><td></td><td class="s"> -2</td></tr>
+<tr><td class="h"><a name="76"></a>76</td><td></td><td></td><td></td><td></td><td class="s"> % perl -Minteger -le 'print (4 % -3)'</td></tr>
+<tr><td class="h"><a name="77"></a>77</td><td></td><td></td><td></td><td></td><td class="s"> 1</td></tr>
+<tr><td class="h"><a name="78"></a>78</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="79"></a>79</td><td></td><td></td><td></td><td></td><td class="s">See L<perlmodlib/"Pragmatic Modules">, L<perlop/"Integer Arithmetic"></td></tr>
+<tr><td class="h"><a name="80"></a>80</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="81"></a>81</td><td></td><td></td><td></td><td></td><td class="s">=cut</td></tr>
+<tr><td class="h"><a name="82"></a>82</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="83"></a>83</td><td class="c3">1</td><td class="c3"><span title="Avg 100ns">100ns</span></td><td></td><td></td><td class="s">$integer::hint_bits = 0x1;</td></tr>
+<tr><td class="h"><a name="84"></a>84</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="85"></a>85</td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 6µs within integer::import which was called 2 times, avg 3µs/call:
+# once (3µs+0s) by URI::_punycode::BEGIN@10 at <a href="URI-_punycode-pm-2516-block.html#10">line 10 of URI/_punycode.pm</a>
+# once (3µs+0s) by Time::Piece::BEGIN@422 at <a href="Time-Piece-pm-858-block.html#422">line 422 of Time/Piece.pm</a></div></div>sub import {</td></tr>
+<tr><td class="h"><a name="86"></a>86</td><td class="c1">2</td><td class="c1"><span title="Avg 5µs">11µs</span></td><td></td><td></td><td class="s"> $^H |= $integer::hint_bits;</td></tr>
+<tr><td class="h"><a name="87"></a>87</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="88"></a>88</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="89"></a>89</td><td></td><td></td><td></td><td></td><td class="s">sub unimport {</td></tr>
+<tr><td class="h"><a name="90"></a>90</td><td></td><td></td><td></td><td></td><td class="s"> $^H &= ~$integer::hint_bits;</td></tr>
+<tr><td class="h"><a name="91"></a>91</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="92"></a>92</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="93"></a>93</td><td class="c3">1</td><td class="c3"><span title="Avg 4µs">4µs</span></td><td></td><td></td><td class="s">1;</td></tr>
+</tbody></table></div>
+
+ <script type="text/javascript"> $(document).ready(function() {
+
+ $("#subs_table").tablesorter({
+ sortList: [[3,1]],
+ headers: {
+ 3: { sorter: 'fmt_time' },
+ 4: { sorter: 'fmt_time' }
+ }
+ });
+
+ } ); </script>
+
+ <div class="footer">Report produced by the
+ <a href="http://search.cpan.org/dist/Devel-NYTProf/">NYTProf 4.06</a>
+ Perl profiler, developed by
+ <a href="http://www.linkedin.com/in/timbunce">Tim Bunce</a> and
+ <a href="http://code.nytimes.com">Adam Kaplan</a>.
+ </div>
+ <br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
+ </body></html>
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