Function vcvt_n_f16_s16 

pub fn vcvt_n_f16_s16(a: int16x4_t, const N: i32) -> float16x4_t

Available on target feature fp16 and target feature neon and (AArch64 or ARM or ARM64EC) and (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) and non-ARM64EC only.

Fixed-point convert to floating-point Arm’s documentation