---
title: "simd_make_double8_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_double8_undef(_:)-7md0u"
---

# simd_make_double8_undef(_:)

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

## Declaration

```swift
func simd_make_double8_undef(_ other: simd_double4) -> simd_double8
```

## See Also

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

- [simd_make_double8(_:)](simd/simd_make_double8(_:)-3wn9q.md)
- [simd_make_double8(_:)](simd/simd_make_double8(_:)-40259.md)
- [simd_make_double8(_:)](simd/simd_make_double8(_:)-3br50.md)
- [simd_make_double8(_:)](simd/simd_make_double8(_:)-4i0aw.md)
- [simd_make_double8(_:_:)](simd/simd_make_double8(_:_:).md)
- [simd_make_double8_undef(_:)](simd/simd_make_double8_undef(_:)-7g0z0.md)
- [simd_make_double8_undef(_:)](simd/simd_make_double8_undef(_:)-7d127.md)