---
title: simd_ulong2
framework: simd
role: symbol
role_heading: Type Alias
path: simd/simd_ulong2
---

# simd_ulong2

A vector of two 64-bit unsigned integer elements.

## Declaration

```swift
typealias simd_ulong2 = SIMD2<simd_ulong1>
```

## Topics

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

- [simd_make_ulong2(_:)](simd/simd_make_ulong2(_:)-oc6t.md)
- [simd_make_ulong2(_:)](simd/simd_make_ulong2(_:)-rr3e.md)
- [simd_make_ulong2(_:)](simd/simd_make_ulong2(_:)-ulyf.md)
- [simd_make_ulong2(_:)](simd/simd_make_ulong2(_:)-17hvf.md)

### Functions to Create Two-Element Vectors From Scalar Values

- [simd_make_ulong2(_:)](simd/simd_make_ulong2(_:)-14omj.md)
- [simd_make_ulong2(_:_:)](simd/simd_make_ulong2(_:_:).md)
- [simd_make_ulong2_undef(_:)](simd/simd_make_ulong2_undef(_:).md)

### Common Functions

- [simd_clamp(_:_:_:)](simd/simd_clamp(_:_:_:)-5y5rd.md)
- [simd_equal(_:_:)](simd/simd_equal(_:_:)-80jzi.md)

### Reduce Functions

- [simd_reduce_min(_:)](simd/simd_reduce_min(_:)-49qq4.md)
- [simd_reduce_max(_:)](simd/simd_reduce_max(_:)-4kgd8.md)
- [simd_reduce_add(_:)](simd/simd_reduce_add(_:)-2q2jq.md)

### Extrema Functions

- [simd_min(_:_:)](simd/simd_min(_:_:)-9be6.md)
- [simd_max(_:_:)](simd/simd_max(_:_:)-86a4g.md)

### Logic and Bitwise Functions

- [simd_any(_:)](simd/simd_any(_:)-64g1r.md)
- [simd_all(_:)](simd/simd_all(_:)-1d8u9.md)
- [simd_bitselect(_:_:_:)](simd/simd_bitselect(_:_:_:)-886h0.md)

### Alternative Type Alias

- [vector_ulong2](simd/vector_ulong2.md)

## See Also

### Vector Data Types

- [simd_ulong1](simd/simd_ulong1.md)
- [simd_ulong3](simd/simd_ulong3.md)
- [simd_ulong4](simd/simd_ulong4.md)
- [simd_ulong8](simd/simd_ulong8.md)