Function svtbx_u64 

pub fn svtbx_u64(
    fallback: svuint64_t,
    data: svuint64_t,
    indices: svuint64_t,
) -> svuint64_t

🔬This is a nightly-only experimental API. (stdarch_aarch64_sve #145052)

Available on (AArch64 or ARM64EC) and target feature sve and target feature sve2 only.

Table lookup in single-vector table (merging) Arm’s documentation