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diff --git a/share/doc/gcc/Long-Long.html b/share/doc/gcc/Long-Long.html new file mode 100644 index 0000000..561a712 --- /dev/null +++ b/share/doc/gcc/Long-Long.html @@ -0,0 +1,115 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- This file documents the use of the GNU compilers. + +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>Using the GNU Compiler Collection (GCC): Long Long</title> + +<meta name="description" content="Using the GNU Compiler Collection (GCC): Long Long"> +<meta name="keywords" content="Using the GNU Compiler Collection (GCC): Long Long"> +<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="Indices.html#Indices" rel="index" title="Indices"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="C-Extensions.html#C-Extensions" rel="up" title="C Extensions"> +<link href="Complex.html#Complex" rel="next" title="Complex"> +<link href="_005f_005fint128.html#g_t_005f_005fint128" rel="previous" title="__int128"> +<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_US" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Long-Long"></a> +<div class="header"> +<p> +Next: <a href="Complex.html#Complex" accesskey="n" rel="next">Complex</a>, Previous: <a href="_005f_005fint128.html#g_t_005f_005fint128" accesskey="p" rel="previous">__int128</a>, Up: <a href="C-Extensions.html#C-Extensions" accesskey="u" rel="up">C Extensions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="Double_002dWord-Integers"></a> +<h3 class="section">6.10 Double-Word Integers</h3> +<a name="index-long-long-data-types"></a> +<a name="index-double_002dword-arithmetic"></a> +<a name="index-multiprecision-arithmetic"></a> +<a name="index-LL-integer-suffix"></a> +<a name="index-ULL-integer-suffix"></a> + +<p>ISO C99 and ISO C++11 support data types for integers that are at least +64 bits wide, and as an extension GCC supports them in C90 and C++98 modes. +Simply write <code>long long int</code> for a signed integer, or +<code>unsigned long long int</code> for an unsigned integer. To make an +integer constant of type <code>long long int</code>, add the suffix ‘<samp>LL</samp>’ +to the integer. To make an integer constant of type <code>unsigned long +long int</code>, add the suffix ‘<samp>ULL</samp>’ to the integer. +</p> +<p>You can use these types in arithmetic like any other integer types. +Addition, subtraction, and bitwise boolean operations on these types +are open-coded on all types of machines. Multiplication is open-coded +if the machine supports a fullword-to-doubleword widening multiply +instruction. Division and shifts are open-coded only on machines that +provide special support. The operations that are not open-coded use +special library routines that come with GCC. +</p> +<p>There may be pitfalls when you use <code>long long</code> types for function +arguments without function prototypes. If a function +expects type <code>int</code> for its argument, and you pass a value of type +<code>long long int</code>, confusion results because the caller and the +subroutine disagree about the number of bytes for the argument. +Likewise, if the function expects <code>long long int</code> and you pass +<code>int</code>. The best way to avoid such problems is to use prototypes. +</p> + + + +</body> +</html> |