Arm64EC – Build and port apps for native performance on Arm
Arm64EC is a new ABI for Windows 11 on Arm devices, offering native performance benefits and compatibility with x64 code. Developers can enhance app performance by transitioning incrementally and rebuilding dependencies. Specific tools help identify Arm64EC binaries and guide the transition process for Win32 apps.
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Arm64EC is a new application binary interface (ABI) for apps running on Arm devices with Windows 11, allowing for native performance benefits like improved power consumption and accelerated AI & ML workloads. It enables interoperability with x64 code running under emulation in the same process, ensuring native performance for Arm64EC code. By incrementally transitioning existing x64 apps to Arm64EC, developers can enhance performance without recompiling the entire application at once. Arm64EC binaries can link both x64 and Arm64EC libs, while Arm64 binaries can only link Arm64 libs. Dependencies should be rebuilt as Arm64EC versions for optimal performance. Developers can identify Arm64EC binaries using specific tools like the developer command prompt or Windows Task Manager. The transition to Arm64EC is detailed in the article, providing guidance on updating Win32 apps using this new ABI.
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10 commentsEverything seems to converge more and more toward RISC-V these days.
It seems like this is when you have the source or the libs but choose to mix x86 and arm?
It would seem if you have the source etc you should just bite the bullet and port everything.
So what should developers do re: Win10 users? Separate builds for them?
If not, is this not just another target architecture? You cannot use it on arm64 architectures, and your app already supports x86.
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