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diff --git a/share/doc/gfortran/CPU_005fTIME.html b/share/doc/gfortran/CPU_005fTIME.html new file mode 100644 index 0000000..2e0d926 --- /dev/null +++ b/share/doc/gfortran/CPU_005fTIME.html @@ -0,0 +1,145 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1999-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). 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This is useful for testing segments of code to determine +execution time. +</p> +<p>If a time source is available, time will be reported with microsecond +resolution. If no time source is available, <var>TIME</var> is set to +<code>-1.0</code>. +</p> +<p>Note that <var>TIME</var> may contain a, system dependent, arbitrary offset +and may not start with <code>0.0</code>. For <code>CPU_TIME</code>, the absolute +value is meaningless, only differences between subsequent calls to +this subroutine, as shown in the example below, should be used. +</p> + +</dd> +<dt><em>Standard</em>:</dt> +<dd><p>Fortran 95 and later +</p> +</dd> +<dt><em>Class</em>:</dt> +<dd><p>Subroutine +</p> +</dd> +<dt><em>Syntax</em>:</dt> +<dd><p><code>CALL CPU_TIME(TIME)</code> +</p> +</dd> +<dt><em>Arguments</em>:</dt> +<dd><table> +<tr><td width="15%"><var>TIME</var></td><td width="70%">The type shall be <code>REAL</code> with <code>INTENT(OUT)</code>.</td></tr> +</table> + +</dd> +<dt><em>Return value</em>:</dt> +<dd><p>None +</p> +</dd> +<dt><em>Example</em>:</dt> +<dd><div class="smallexample"> +<pre class="smallexample">program test_cpu_time + real :: start, finish + call cpu_time(start) + ! put code to test here + call cpu_time(finish) + print '("Time = ",f6.3," seconds.")',finish-start +end program test_cpu_time +</pre></div> + +</dd> +<dt><em>See also</em>:</dt> +<dd><p><a href="SYSTEM_005fCLOCK.html#SYSTEM_005fCLOCK">SYSTEM_CLOCK</a>, <br> +<a href="DATE_005fAND_005fTIME.html#DATE_005fAND_005fTIME">DATE_AND_TIME</a> +</p></dd> +</dl> + + + + + + +</body> +</html> |