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<div class="subsection-level-extent" id="ARM-C-Language-Extensions-_0028ACLE_0029"> <div class="nav-panel"> <p> Next: <a href="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-in-functions" accesskey="p" rel="prev">ARM iWMMXt Built-in Functions</a>, Up: <a href="target-builtins" accesskey="u" rel="up">Built-in Functions Specific to Particular Target Machines</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div>  <h1 class="subsection" id="ARM-C-Language-Extensions-_0028ACLE_0029-1"><span>6.60.7 ARM C Language Extensions (ACLE)<a class="copiable-link" href="#ARM-C-Language-Extensions-_0028ACLE_0029-1"> ¶</a></span></h1> <p>GCC implements extensions for C as described in the ARM C Language Extensions (ACLE) specification, which can be found at <a class="uref" href="https://developer.arm.com/documentation/ihi0053/latest/">https://developer.arm.com/documentation/ihi0053/latest/</a>. </p> <p>As a part of ACLE, GCC implements extensions for Advanced SIMD as described in the ARM C Language Extensions Specification. The complete list of Advanced SIMD intrinsics can be found at <a class="uref" href="https://developer.arm.com/documentation/ihi0073/latest/">https://developer.arm.com/documentation/ihi0073/latest/</a>. The built-in intrinsics for the Advanced SIMD extension are available when NEON is enabled. </p> <p>Currently, ARM and AArch64 back ends do not support ACLE 2.0 fully. Both back ends support CRC32 intrinsics and the ARM back end supports the Coprocessor intrinsics, all from <samp class="file">arm_acle.h</samp>. The ARM back end’s 16-bit floating-point Advanced SIMD intrinsics currently comply to ACLE v1.1. AArch64’s back end does not have support for 16-bit floating point Advanced SIMD intrinsics yet. </p> <p>See <a class="ref" href="arm-options">ARM Options</a> and <a class="ref" href="aarch64-options">AArch64 Options</a> for more information on the availability of extensions. </p> </div><div class="_attribution">
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