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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/Examples.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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| -rw-r--r-- | share/doc/gccint/Examples.html | 128 |
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diff --git a/share/doc/gccint/Examples.html b/share/doc/gccint/Examples.html new file mode 100644 index 0000000..4ddb479 --- /dev/null +++ b/share/doc/gccint/Examples.html @@ -0,0 +1,128 @@ +<!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: Examples</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Examples"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Examples"> +<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="Mode-Iterators.html#Mode-Iterators" rel="up" title="Mode Iterators"> +<link href="Code-Iterators.html#Code-Iterators" rel="next" title="Code Iterators"> +<link href="Substitutions.html#Substitutions" rel="previous" title="Substitutions"> +<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="Examples"></a> +<div class="header"> +<p> +Previous: <a href="Substitutions.html#Substitutions" accesskey="p" rel="previous">Substitutions</a>, Up: <a href="Mode-Iterators.html#Mode-Iterators" accesskey="u" rel="up">Mode Iterators</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="Mode-Iterator-Examples"></a> +<h4 class="subsubsection">17.23.1.3 Mode Iterator Examples</h4> + +<p>Here is an example from the MIPS port. It defines the following +modes and attributes (among others): +</p> +<div class="smallexample"> +<pre class="smallexample">(define_mode_iterator GPR [SI (DI "TARGET_64BIT")]) +(define_mode_attr d [(SI "") (DI "d")]) +</pre></div> + +<p>and uses the following template to define both <code>subsi3</code> +and <code>subdi3</code>: +</p> +<div class="smallexample"> +<pre class="smallexample">(define_insn "sub<mode>3" + [(set (match_operand:GPR 0 "register_operand" "=d") + (minus:GPR (match_operand:GPR 1 "register_operand" "d") + (match_operand:GPR 2 "register_operand" "d")))] + "" + "<d>subu\t%0,%1,%2" + [(set_attr "type" "arith") + (set_attr "mode" "<MODE>")]) +</pre></div> + +<p>This is exactly equivalent to: +</p> +<div class="smallexample"> +<pre class="smallexample">(define_insn "subsi3" + [(set (match_operand:SI 0 "register_operand" "=d") + (minus:SI (match_operand:SI 1 "register_operand" "d") + (match_operand:SI 2 "register_operand" "d")))] + "" + "subu\t%0,%1,%2" + [(set_attr "type" "arith") + (set_attr "mode" "SI")]) + +(define_insn "subdi3" + [(set (match_operand:DI 0 "register_operand" "=d") + (minus:DI (match_operand:DI 1 "register_operand" "d") + (match_operand:DI 2 "register_operand" "d")))] + "TARGET_64BIT" + "dsubu\t%0,%1,%2" + [(set_attr "type" "arith") + (set_attr "mode" "DI")]) +</pre></div> + + + + +</body> +</html> |