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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gccint/Comparison-functions-for-poly_005fint.html | |
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diff --git a/share/doc/gccint/Comparison-functions-for-poly_005fint.html b/share/doc/gccint/Comparison-functions-for-poly_005fint.html new file mode 100644 index 0000000..dca9b05 --- /dev/null +++ b/share/doc/gccint/Comparison-functions-for-poly_005fint.html @@ -0,0 +1,132 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 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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Copies published by the Free Software Foundation raise + funds for GNU development. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: Comparison functions for poly_int</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Comparison functions for poly_int"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Comparison functions for poly_int"> +<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="Comparisons-involving-poly_005fint.html#Comparisons-involving-poly_005fint" rel="up" title="Comparisons involving poly_int"> +<link href="Properties-of-the-poly_005fint-comparisons.html#Properties-of-the-poly_005fint-comparisons" rel="next" title="Properties of the poly_int comparisons"> +<link href="Comparisons-involving-poly_005fint.html#Comparisons-involving-poly_005fint" rel="previous" title="Comparisons involving poly_int"> +<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="Comparison-functions-for-poly_005fint"></a> +<div class="header"> +<p> +Next: <a href="Properties-of-the-poly_005fint-comparisons.html#Properties-of-the-poly_005fint-comparisons" accesskey="n" rel="next">Properties of the <code>poly_int</code> comparisons</a>, Up: <a href="Comparisons-involving-poly_005fint.html#Comparisons-involving-poly_005fint" accesskey="u" rel="up">Comparisons involving <code>poly_int</code></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> +</div> +<hr> +<a name="Comparison-functions-for-poly_005fint-1"></a> +<h4 class="subsection">10.3.1 Comparison functions for <code>poly_int</code></h4> + +<p><code>poly_int</code> provides the following routines for checking whether +a particular condition “may be” (might be) true: +</p> +<div class="example"> +<pre class="example">maybe_lt maybe_le maybe_eq maybe_ge maybe_gt + maybe_ne +</pre></div> + +<p>The functions have their natural meaning: +</p> +<dl compact="compact"> +<dt>‘<samp>maybe_lt(<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> might be less than <var>b</var>. +</p> +</dd> +<dt>‘<samp>maybe_le(<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> might be less than or equal to <var>b</var>. +</p> +</dd> +<dt>‘<samp>maybe_eq(<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> might be equal to <var>b</var>. +</p> +</dd> +<dt>‘<samp>maybe_ne(<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> might not be equal to <var>b</var>. +</p> +</dd> +<dt>‘<samp>maybe_ge(<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> might be greater than or equal to <var>b</var>. +</p> +</dd> +<dt>‘<samp>maybe_gt(<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> might be greater than <var>b</var>. +</p></dd> +</dl> + +<p>For readability, <code>poly_int</code> also provides “known” inverses of these +functions: +</p> +<div class="example"> +<pre class="example">known_lt (<var>a</var>, <var>b</var>) == !maybe_ge (<var>a</var>, <var>b</var>) +known_le (<var>a</var>, <var>b</var>) == !maybe_gt (<var>a</var>, <var>b</var>) +known_eq (<var>a</var>, <var>b</var>) == !maybe_ne (<var>a</var>, <var>b</var>) +known_ge (<var>a</var>, <var>b</var>) == !maybe_lt (<var>a</var>, <var>b</var>) +known_gt (<var>a</var>, <var>b</var>) == !maybe_le (<var>a</var>, <var>b</var>) +known_ne (<var>a</var>, <var>b</var>) == !maybe_eq (<var>a</var>, <var>b</var>) +</pre></div> + + + + +</body> +</html> |