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diff --git a/share/doc/gccint/Other-poly_005fint-arithmetic.html b/share/doc/gccint/Other-poly_005fint-arithmetic.html new file mode 100644 index 0000000..cdfa4ff --- /dev/null +++ b/share/doc/gccint/Other-poly_005fint-arithmetic.html @@ -0,0 +1,124 @@ +<!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: Other poly_int arithmetic</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Other poly_int arithmetic"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Other poly_int arithmetic"> +<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="Arithmetic-on-poly_005fints.html#Arithmetic-on-poly_005fints" rel="up" title="Arithmetic on poly_ints"> +<link href="Alignment-of-poly_005fints.html#Alignment-of-poly_005fints" rel="next" title="Alignment of poly_ints"> +<link href="Division-of-poly_005fints.html#Division-of-poly_005fints" rel="previous" title="Division of poly_ints"> +<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="Other-poly_005fint-arithmetic"></a> +<div class="header"> +<p> +Previous: <a href="Division-of-poly_005fints.html#Division-of-poly_005fints" accesskey="p" rel="previous">Division of <code>poly_int</code>s</a>, Up: <a href="Arithmetic-on-poly_005fints.html#Arithmetic-on-poly_005fints" accesskey="u" rel="up">Arithmetic on <code>poly_int</code>s</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="Other-poly_005fint-arithmetic-1"></a> +<h4 class="subsection">10.4.4 Other <code>poly_int</code> arithmetic</h4> + +<p>There are tentative routines for other operations besides division: +</p> +<dl compact="compact"> +<dt>‘<samp>can_ior_p (<var>a</var>, <var>b</var>, &<var>result</var>)</samp>’</dt> +<dd><p>Return true if we can calculate ‘<samp><var>a</var> | <var>b</var></samp>’ at compile time, +storing the result in <var>result</var> if so. +</p></dd> +</dl> + +<p>Also, ANDs with a value ‘<samp>(1 << <var>y</var>) - 1</samp>’ or its inverse can be +treated as alignment operations. See <a href="Alignment-of-poly_005fints.html#Alignment-of-poly_005fints">Alignment of <code>poly_int</code>s</a>. +</p> +<p>In addition, the following miscellaneous routines are available: +</p> +<dl compact="compact"> +<dt>‘<samp>coeff_gcd (<var>a</var>)</samp>’</dt> +<dd><p>Return the greatest common divisor of all nonzero coefficients in +<var>a</var>, or zero if <var>a</var> is known to be zero. +</p> +</dd> +<dt>‘<samp>common_multiple (<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return a value that is a multiple of both <var>a</var> and <var>b</var>, where +one value is a <code>poly_int</code> and the other is a scalar. The result +will be the least common multiple for some indeterminate values but +not necessarily for all. +</p> +</dd> +<dt>‘<samp>force_common_multiple (<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Return a value that is a multiple of both <code>poly_int</code> <var>a</var> and +<code>poly_int</code> <var>b</var>, asserting that such a value exists. The +result will be the least common multiple for some indeterminate values +but not necessarily for all. +</p> +<p>When using this routine, please add a comment explaining why the +assertion is known to hold. +</p></dd> +</dl> + +<p>Please add any other operations that you find to be useful. +</p> + + + +</body> +</html> |