diff options
Diffstat (limited to 'share/doc/gcc/PRU-Built_002din-Functions.html')
| -rw-r--r-- | share/doc/gcc/PRU-Built_002din-Functions.html | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/share/doc/gcc/PRU-Built_002din-Functions.html b/share/doc/gcc/PRU-Built_002din-Functions.html new file mode 100644 index 0000000..1a3060a --- /dev/null +++ b/share/doc/gcc/PRU-Built_002din-Functions.html @@ -0,0 +1,114 @@ +<!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). 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>Using the GNU Compiler Collection (GCC): PRU Built-in Functions</title> + +<meta name="description" content="Using the GNU Compiler Collection (GCC): PRU Built-in Functions"> +<meta name="keywords" content="Using the GNU Compiler Collection (GCC): PRU Built-in Functions"> +<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="Target-Builtins.html#Target-Builtins" rel="up" title="Target Builtins"> +<link href="RISC_002dV-Built_002din-Functions.html#RISC_002dV-Built_002din-Functions" rel="next" title="RISC-V Built-in Functions"> +<link href="PowerPC-Matrix_002dMultiply-Assist-Built_002din-Functions.html#PowerPC-Matrix_002dMultiply-Assist-Built_002din-Functions" rel="previous" title="PowerPC Matrix-Multiply Assist Built-in Functions"> +<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="PRU-Built_002din-Functions"></a> +<div class="header"> +<p> +Next: <a href="RISC_002dV-Built_002din-Functions.html#RISC_002dV-Built_002din-Functions" accesskey="n" rel="next">RISC-V Built-in Functions</a>, Previous: <a href="PowerPC-Matrix_002dMultiply-Assist-Built_002din-Functions.html#PowerPC-Matrix_002dMultiply-Assist-Built_002din-Functions" accesskey="p" rel="previous">PowerPC Matrix-Multiply Assist Built-in Functions</a>, Up: <a href="Target-Builtins.html#Target-Builtins" accesskey="u" rel="up">Target Builtins</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="PRU-Built_002din-Functions-1"></a> +<h4 class="subsection">6.60.27 PRU Built-in Functions</h4> + +<p>GCC provides a couple of special builtin functions to aid in utilizing +special PRU instructions. +</p> +<p>The built-in functions supported are: +</p> +<dl> +<dt><a name="index-_005f_005fdelay_005fcycles"></a>Built-in Function: <em>void</em> <strong>__delay_cycles</strong> <em>(constant long long <var>cycles</var>)</em></dt> +<dd><p>This inserts an instruction sequence that takes exactly <var>cycles</var> +cycles (between 0 and 0xffffffff) to complete. The inserted sequence +may use jumps, loops, or no-ops, and does not interfere with any other +instructions. Note that <var>cycles</var> must be a compile-time constant +integer - that is, you must pass a number, not a variable that may be +optimized to a constant later. The number of cycles delayed by this +builtin is exact. +</p></dd></dl> + +<dl> +<dt><a name="index-_005f_005fhalt"></a>Built-in Function: <em>void</em> <strong>__halt</strong> <em>(void)</em></dt> +<dd><p>This inserts a HALT instruction to stop processor execution. +</p></dd></dl> + +<dl> +<dt><a name="index-_005f_005flmbd"></a>Built-in Function: <em>unsigned int</em> <strong>__lmbd</strong> <em>(unsigned int <var>wordval</var>, unsigned int <var>bitval</var>)</em></dt> +<dd><p>This inserts LMBD instruction to calculate the left-most bit with value +<var>bitval</var> in value <var>wordval</var>. Only the least significant bit +of <var>bitval</var> is taken into account. +</p></dd></dl> + + + + +</body> +</html> |