Arm64EC - Build and port apps for native performance on Arm
Arm64EC (“Emulation Compatible”) enables you to build new native apps or incrementally transition existing x64 apps to take advantage of the native speed and performance possible with Arm-powered devices, including better power consumption, battery life, and accelerated AI & ML workloads.
Arm64EC is a new application binary interface (ABI) for apps running on Arm devices with Windows 11. It is a Windows 11 feature that requires the use of the Windows 11 SDK and is not available on Windows 10 on Arm.
Code built as Arm64EC is interoperable with x64 code running under emulation within the same process. The Arm64EC code in the process runs with native performance, while any x64 code runs using emulation that comes built-in with Windows 11. Even if your app relies on existing dependencies or plugins that don't yet support Arm, you can start to rebuild parts of your app as Arm64EC to gain the benefits of native performance.
Arm64EC guarantees interoperability with x64 by following x64 software conventions including calling convention, stack usage, data structure layout, and preprocessor definitions. However, Arm64EC code is not compatible with code built as Arm64, which uses a different set of software conventions.
