Function vdupq_laneq_f16 

pub fn vdupq_laneq_f16(a: float16x8_t, const N: i32) -> float16x8_t

Available on little-endian 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.

Set all vector lanes to the same value Arm’s documentation