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## svldnf1sh_vnum_u64

# Function svldnf1sh_vnum_u64

Source

    pub unsafe fn svldnf1sh_vnum_u64(
        pg: svbool_t,
        base: *const i16,
        vnum: i64,
    ) -> svuint64_t

🔬This is a nightly-only experimental API. (`stdarch_aarch64_sve` #145052)
Available on (AArch64 or ARM64EC) and target feature `sve` only.
Expand description

Load 16-bit data and sign-extend, non-faulting Arm’s documentation

### §Safety

- `pointer::offset` safety constraints must be met for the address calculation for each active element (governed by `pg`, the first-fault register (`FFR`) and non-faulting behaviour). In particular, note that `vnum` is scaled by the vector length, `VL`, which is not known at compile time.
- This dereferences and accesses the calculated address for each active element (governed by `pg`, the first-fault register (`FFR`) and non-faulting behaviour).
- Result lanes corresponding to inactive FFR lanes (either before or as a result of this intrinsic) have “CONSTRAINED UNPREDICTABLE” values, irrespective of predication. Refer to architectural documentation for details.