Function svclastb_n_s64 

pub fn svclastb_n_s64(pg: svbool_t, fallback: i64, data: svint64_t) -> i64

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

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

Conditionally extract last element Arm’s documentation