Function svcvtlt_f64_f32_m 

pub fn svcvtlt_f64_f32_m(
    inactive: svfloat64_t,
    pg: svbool_t,
    op: svfloat32_t,
) -> svfloat64_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.

Up convert long (top) Arm’s documentation