The short answer is on Windows 10 on ARM.
+-----------------------------------------------------------------------+ | Windows 10 ARM64 Operating System | +-----------------------------------------------------------------------+ | | | v v v +-----------------------+ +-----------------------+ +-----------------------+ | ARM64 Apps (Native) | | ARM32 Apps (Native) | | x86 Apps (Emulated) | | Runs at full speed | | Runs via WOW64 layer | | Runs via software | | Using 64-bit registers| | Direct CPU execution | | JIT compilation | +-----------------------+ +-----------------------+ +-----------------------+ 1. Native ARM64
Windows 10 on ARM is a 64-bit operating system that provides verified native and emulated support for 32-bit applications. While Microsoft has stopped offering 32-bit (x86) builds of Windows 10 to OEMs for new PCs, the ARM64 version of the OS remains the standard for ARM-based devices like the Surface Pro X. Architecture Support and Verification