Microsoft has announced the launch of a new ARM64EC (Emulation Compatible) technology that helps build semi-native Windows 11 applications on ARM. With the tools already available in the Visual Studio Platform Previews and the Windows 11 Insider Preview SDK, developers can use ARM64EC to gradually migrate applications to the ARM architecture without spending a lot of time. The main advantage of ARM64EC is simplified optimization: the technology allows not to rebuild an application for ARM with a complete recompilation.
ARM64EC is a Binary Interface (ABI) that is compatible with both native ARM64 processor architecture and x64 emulation. An entire application, a separate process, or even a module can depend on x64, so ARM64EC will provide the ability to work in integrated mode by half – a key part of the base can be ported to ARM64EC for better performance and autonomy, while any x64 code will run in emulation. Microsoft notes that the technology will significantly increase the speed of natively incompatible Windows 11 applications on ARM, bringing them closer to the native level.
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