Function vcvtq_n_s16_f16 

pub fn vcvtq_n_s16_f16(a: float16x8_t, const N: i32) -> int16x8_t

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

Floating-point convert to signed fixed-point Arm’s documentation