Function svcls_s8_z 

pub fn svcls_s8_z(pg: svbool_t, op: svint8_t) -> svuint8_t

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

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

Count leading sign bits Arm’s documentation