huangmeng
/
Embedded_AI


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126
							<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 1999-2017 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).  A copy of the license is included in the section entitled
"GNU Free Documentation License".

(a) The FSF's Front-Cover Text is:

A GNU Manual

(b) The FSF's Back-Cover Text is:

You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development. -->
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
<head>
<title>The GNU Fortran Compiler: TIME8</title>

<meta name="description" content="The GNU Fortran Compiler: TIME8">
<meta name="keywords" content="The GNU Fortran Compiler: TIME8">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
<link href="TINY.html#TINY" rel="next" title="TINY">
<link href="TIME.html#TIME" rel="prev" title="TIME">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.indentedblock {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
div.smalllisp {margin-left: 3.2em}
kbd {font-style:oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nocodebreak {white-space:nowrap}
span.nolinebreak {white-space:nowrap}
span.roman {font-family:serif; font-weight:normal}
span.sansserif {font-family:sans-serif; font-weight:normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="TIME8"></a>
<div class="header">
<p>
Next: <a href="TINY.html#TINY" accesskey="n" rel="next">TINY</a>, Previous: <a href="TIME.html#TIME" accesskey="p" rel="prev">TIME</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="TIME8-_002d_002d_002d-Time-function-_002864_002dbit_0029"></a>
<h3 class="section">9.268 <code>TIME8</code> &mdash; Time function (64-bit)</h3>
<a name="index-TIME8"></a>
<a name="index-time_002c-current-4"></a>
<a name="index-current-time-4"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p>Returns the current time encoded as an integer (in the manner of the
function <code>time(3)</code> in the C standard library). This value is
suitable for passing to <a href="CTIME.html#CTIME">CTIME</a>, <a href="GMTIME.html#GMTIME">GMTIME</a>, and <a href="LTIME.html#LTIME">LTIME</a>.
</p>
<p><em>Warning:</em> this intrinsic does not increase the range of the timing
values over that returned by <code>time(3)</code>. On a system with a 32-bit
<code>time(3)</code>, <code>TIME8</code> will return a 32-bit value, even though
it is converted to a 64-bit <code>INTEGER(8)</code> value. That means
overflows of the 32-bit value can still occur. Therefore, the values
returned by this intrinsic might be or become negative or numerically
less than previous values during a single run of the compiled program.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>GNU extension
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>RESULT = TIME8()</code>
</p>
</dd>
<dt><em>Return value</em>:</dt>
<dd><p>The return value is a scalar of type <code>INTEGER(8)</code>.
</p>
</dd>
<dt><em>See also</em>:</dt>
<dd><p><a href="DATE_005fAND_005fTIME.html#DATE_005fAND_005fTIME">DATE_AND_TIME</a>, <a href="CTIME.html#CTIME">CTIME</a>, <a href="GMTIME.html#GMTIME">GMTIME</a>, <a href="LTIME.html#LTIME">LTIME</a>, <a href="MCLOCK8.html#MCLOCK8">MCLOCK8</a>, <a href="TIME.html#TIME">TIME</a>
</p>
</dd>
</dl>


</body>
</html>