Function svmlalb_lane_u64 

pub fn svmlalb_lane_u64<const IMM_INDEX: i32>(
    op1: svuint64_t,
    op2: svuint32_t,
    op3: svuint32_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.

Multiply-add long (bottom) Arm’s documentation