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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/Division-of-poly_005fints.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/gccint/Division-of-poly_005fints.html b/share/doc/gccint/Division-of-poly_005fints.html new file mode 100644 index 0000000..fe0fe14 --- /dev/null +++ b/share/doc/gccint/Division-of-poly_005fints.html @@ -0,0 +1,127 @@ +<!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). 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 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: Division of poly_ints</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Division of poly_ints"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Division of poly_ints"> +<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="Other-poly_005fint-arithmetic.html#Other-poly_005fint-arithmetic" rel="next" title="Other poly_int arithmetic"> +<link href="wi-arithmetic-on-poly_005fints.html#wi-arithmetic-on-poly_005fints" rel="previous" title="wi arithmetic on 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="Division-of-poly_005fints"></a> +<div class="header"> +<p> +Next: <a href="Other-poly_005fint-arithmetic.html#Other-poly_005fint-arithmetic" accesskey="n" rel="next">Other <code>poly_int</code> arithmetic</a>, Previous: <a href="wi-arithmetic-on-poly_005fints.html#wi-arithmetic-on-poly_005fints" accesskey="p" rel="previous"><code>wi</code> arithmetic on <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="Division-of-poly_005fints-1"></a> +<h4 class="subsection">10.4.3 Division of <code>poly_int</code>s</h4> + +<p>Division of <code>poly_int</code>s is possible for certain inputs. The functions +for division return true if the operation is possible and in most cases +return the results by pointer. The routines are: +</p> +<dl compact="compact"> +<dt>‘<samp>multiple_p (<var>a</var>, <var>b</var>)</samp>’</dt> +<dt>‘<samp>multiple_p (<var>a</var>, <var>b</var>, &<var>quotient</var>)</samp>’</dt> +<dd><p>Return true if <var>a</var> is an exact multiple of <var>b</var>, storing the result +in <var>quotient</var> if so. There are overloads for various combinations +of polynomial and constant <var>a</var>, <var>b</var> and <var>quotient</var>. +</p> +</dd> +<dt>‘<samp>constant_multiple_p (<var>a</var>, <var>b</var>)</samp>’</dt> +<dt>‘<samp>constant_multiple_p (<var>a</var>, <var>b</var>, &<var>quotient</var>)</samp>’</dt> +<dd><p>Like <code>multiple_p</code>, but also test whether the multiple is a +compile-time constant. +</p> +</dd> +<dt>‘<samp>can_div_trunc_p (<var>a</var>, <var>b</var>, &<var>quotient</var>)</samp>’</dt> +<dt>‘<samp>can_div_trunc_p (<var>a</var>, <var>b</var>, &<var>quotient</var>, &<var>remainder</var>)</samp>’</dt> +<dd><p>Return true if we can calculate ‘<samp>trunc (<var>a</var> / <var>b</var>)</samp>’ at compile +time, storing the result in <var>quotient</var> and <var>remainder</var> if so. +</p> +</dd> +<dt>‘<samp>can_div_away_from_zero_p (<var>a</var>, <var>b</var>, &<var>quotient</var>)</samp>’</dt> +<dd><p>Return true if we can calculate ‘<samp><var>a</var> / <var>b</var></samp>’ at compile time, +rounding away from zero. Store the result in <var>quotient</var> if so. +</p> +<p>Note that this is true if and only if <code>can_div_trunc_p</code> is true. +The only difference is in the rounding of the result. +</p></dd> +</dl> + +<p>There is also an asserting form of division: +</p> +<dl compact="compact"> +<dt>‘<samp>exact_div (<var>a</var>, <var>b</var>)</samp>’</dt> +<dd><p>Assert that <var>a</var> is a multiple of <var>b</var> and return +‘<samp><var>a</var> / <var>b</var></samp>’. The result is a <code>poly_int</code> if <var>a</var> +is a <code>poly_int</code>. +</p></dd> +</dl> + + + + +</body> +</html> |