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105 lines
5.3 KiB
HTML
105 lines
5.3 KiB
HTML
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<title>ARM C Language Extensions (ACLE) (Using the GNU Compiler Collection (GCC))</title>
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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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<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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