Intel Compiler Engineer Shares Latest Project Gains For APX
Intel and AMD compiler engineers presented updates on x86 Advanced Performance Extensions (APX) and AI Compute Extensions (ACE) at the GNU Tools Cauldron 2026 conference. Intel reported that APX support is stable in recent GCC and LLVM versions, with simulations projecting significant reductions in memory operations and instruction counts. AMD detailed the ongoing integration of ACE V1 into the GCC compiler, with full support expected in a future release.
- ▪Intel's Hongtao Liu confirmed that APX support is well-established in GCC 15.1 and LLVM 20.1 when paired with specific Binutils, Glibc, and Linux kernel versions.
- ▪SPEC CPU 2017 simulations indicate that APX can reduce loads by over 10%, stores by over 20%, and total instructions by more than 10%.
- ▪AMD engineers presented on ACE V1, noting that the work is currently in GCC Git and is targeted for inclusion in GCC 17.1.
- ▪Real-world performance impacts of APX will be measurable once processors like Diamond Rapids and Nova Lake become available.
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| Original publisher | Phoronix |
| Canonical URL | https://www.phoronix.com/news/Intel-APX-Projected-Gains |
| Publication time | Tue, 06 Oct 2026 05:54:17 -0400 |
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Intel Compiler Engineer Shares Latest Project Gains For APX Written by Michael Larabel in GNU on 6 October 2026 at 05:54 AM EDT. Add A Comment Last week at the GNU Tools Cauldron 2026 conference in Prague there was an x86 BOF with presentations both by AMD and Intel compiler engineers. There are a few interesting nuggets out of that with both Advanced Performance Extensions (APX) and AI Compute Extensions (ACE) talked about as part of their ongoing enablement in the GCC compiler. As covered in many Phoronix articles in recent months, both APX and AI Compute Extensions have been seeing a lot of enablement work happening to the GNU Compiler Collection as well as other open-source compiler infrastructure.
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