Many useful ARM intrinsics (such as fma, rng, ld64b, etc.) are described in Arm C Language Extensions. But the arm_acle.h header file shipped with Xcode not include them. Are these intrinsics supported by Apple Silicon chip?
aarch64 intrinsics
The current Apple Silicon chips support ARM Neon intrinsics. I have had success including the arm_neon.h header file, both with Xcode and using clang directly on the command line.