---
title: "simd_make_ulong8_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_ulong8_undef(_:)-d5pk"
---

# simd_make_ulong8_undef(_:)

Returns a new vector from the specified four-element vector, and other elements undefined.

## Declaration

```swift
func simd_make_ulong8_undef(_ other: simd_ulong4) -> simd_ulong8
```

## See Also

### Functions to Create Eight-Element Vectors From Other Vectors

- [simd_make_ulong8(_:)](simd/simd_make_ulong8(_:)-5w0n4.md)
- [simd_make_ulong8(_:)](simd/simd_make_ulong8(_:)-5zhz7.md)
- [simd_make_ulong8(_:)](simd/simd_make_ulong8(_:)-6hggi.md)
- [simd_make_ulong8(_:)](simd/simd_make_ulong8(_:)-6wa2m.md)
- [simd_make_ulong8(_:_:)](simd/simd_make_ulong8(_:_:).md)
- [simd_make_ulong8_undef(_:)](simd/simd_make_ulong8_undef(_:)-9rdt9.md)
- [simd_make_ulong8_undef(_:)](simd/simd_make_ulong8_undef(_:)-9oge2.md)