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105 lines
5.3 KiB
HTML
105 lines
5.3 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2018 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>ARM C Language Extensions (ACLE) (Using the GNU Compiler Collection (GCC))</title>
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<meta name="description" content="ARM C Language Extensions (ACLE) (Using the GNU Compiler Collection (GCC))">
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<meta name="keywords" content="ARM C Language Extensions (ACLE) (Using the GNU Compiler Collection (GCC))">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Target-Builtins.html#Target-Builtins" rel="up" title="Target Builtins">
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<link href="ARM-Floating-Point-Status-and-Control-Intrinsics.html#ARM-Floating-Point-Status-and-Control-Intrinsics" rel="next" title="ARM Floating Point Status and Control Intrinsics">
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<link href="ARM-iWMMXt-Built_002din-Functions.html#ARM-iWMMXt-Built_002din-Functions" rel="prev" title="ARM iWMMXt Built-in Functions">
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</head>
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<body lang="en">
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<a name="ARM-C-Language-Extensions-_0028ACLE_0029"></a>
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<div class="header">
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<p>
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Next: <a href="ARM-Floating-Point-Status-and-Control-Intrinsics.html#ARM-Floating-Point-Status-and-Control-Intrinsics" accesskey="n" rel="next">ARM Floating Point Status and Control Intrinsics</a>, Previous: <a href="ARM-iWMMXt-Built_002din-Functions.html#ARM-iWMMXt-Built_002din-Functions" accesskey="p" rel="prev">ARM iWMMXt 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="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="ARM-C-Language-Extensions-_0028ACLE_0029-1"></a>
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<h4 class="subsection">6.59.7 ARM C Language Extensions (ACLE)</h4>
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<p>GCC implements extensions for C as described in the ARM C Language
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Extensions (ACLE) specification, which can be found at
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<a href="http://infocenter.arm.com/help/topic/com.arm.doc.ihi0053c/IHI0053C_acle_2_0.pdf">http://infocenter.arm.com/help/topic/com.arm.doc.ihi0053c/IHI0053C_acle_2_0.pdf</a>.
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</p>
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<p>As a part of ACLE, GCC implements extensions for Advanced SIMD as described in
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the ARM C Language Extensions Specification. The complete list of Advanced SIMD
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intrinsics can be found at
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<a href="http://infocenter.arm.com/help/topic/com.arm.doc.ihi0073a/IHI0073A_arm_neon_intrinsics_ref.pdf">http://infocenter.arm.com/help/topic/com.arm.doc.ihi0073a/IHI0073A_arm_neon_intrinsics_ref.pdf</a>.
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The built-in intrinsics for the Advanced SIMD extension are available when
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NEON is enabled.
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</p>
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<p>Currently, ARM and AArch64 back ends do not support ACLE 2.0 fully. Both
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back ends support CRC32 intrinsics and the ARM back end supports the
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Coprocessor intrinsics, all from <samp>arm_acle.h</samp>. The ARM back end’s 16-bit
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floating-point Advanced SIMD intrinsics currently comply to ACLE v1.1.
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AArch64’s back end does not have support for 16-bit floating point Advanced SIMD
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intrinsics yet.
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</p>
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<p>See <a href="ARM-Options.html#ARM-Options">ARM Options</a> and <a href="AArch64-Options.html#AArch64-Options">AArch64 Options</a> for more information on the
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availability of extensions.
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</p>
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</body>
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</html>
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