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104 lines
4.5 KiB
HTML
104 lines
4.5 KiB
HTML
4 years ago
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Computing bounds on poly_ints (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="Computing bounds on poly_ints (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="Computing bounds on poly_ints (GNU Compiler Collection (GCC) Internals)">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="poly_005fint.html#poly_005fint" rel="up" title="poly_int">
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<link href="Converting-poly_005fints.html#Converting-poly_005fints" rel="next" title="Converting poly_ints">
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<link href="Alignment-of-poly_005fints.html#Alignment-of-poly_005fints" rel="prev" title="Alignment of poly_ints">
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</head>
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<body lang="en">
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<a name="Computing-bounds-on-poly_005fints"></a>
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<div class="header">
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<p>
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Next: <a href="Converting-poly_005fints.html#Converting-poly_005fints" accesskey="n" rel="next">Converting <code>poly_int</code>s</a>, Previous: <a href="Alignment-of-poly_005fints.html#Alignment-of-poly_005fints" accesskey="p" rel="prev">Alignment of <code>poly_int</code>s</a>, Up: <a href="poly_005fint.html#poly_005fint" accesskey="u" rel="up">poly_int</a> [<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>
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</div>
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<hr>
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<a name="Computing-bounds-on-poly_005fints-1"></a>
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<h3 class="section">10.6 Computing bounds on <code>poly_int</code>s</h3>
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<p><code>poly_int</code> also provides routines for calculating lower and upper bounds:
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</p>
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<dl compact="compact">
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<dt>‘<samp>constant_lower_bound (<var>a</var>)</samp>’</dt>
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<dd><p>Assert that <var>a</var> is nonnegative and return the smallest value it can have.
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</p>
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</dd>
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<dt>‘<samp>lower_bound (<var>a</var>, <var>b</var>)</samp>’</dt>
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<dd><p>Return a value that is always less than or equal to both <var>a</var> and <var>b</var>.
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It will be the greatest such value for some indeterminate values
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but necessarily for all.
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</p>
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</dd>
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<dt>‘<samp>upper_bound (<var>a</var>, <var>b</var>)</samp>’</dt>
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<dd><p>Return a value that is always greater than or equal to both <var>a</var> and
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<var>b</var>. It will be the least such value for some indeterminate values
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but necessarily for all.
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</p></dd>
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</dl>
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</body>
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</html>
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