Function vbsl_p16 

pub fn vbsl_p16(a: uint16x4_t, b: poly16x4_t, c: poly16x4_t) -> poly16x4_t

Available on (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) and (ARM or AArch64 or ARM64EC) and target feature neon only.

Bitwise Select. Arm’s documentation