---
title: "vU128FullMultiply(_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vu128fullmultiply(_:_:_:)"
---

# vU128FullMultiply(_:_:_:)

Unsigned 128-bit multiplication; result is twice as wide as multiplicands.

## Declaration

```swift
func vU128FullMultiply(_ a: UnsafePointer<vU128>, _ b: UnsafePointer<vU128>, _ result: UnsafeMutablePointer<vU256>)
```

## See Also

### Performing arithmetic operations on large integers

- [vU256Add(_:_:_:)](accelerate/vu256add(_:_:_:).md)
- [vU256AddS(_:_:_:)](accelerate/vu256adds(_:_:_:).md)
- [vS256Add(_:_:_:)](accelerate/vs256add(_:_:_:).md)
- [vS256AddS(_:_:_:)](accelerate/vs256adds(_:_:_:).md)
- [vU512Add(_:_:_:)](accelerate/vu512add(_:_:_:).md)
- [vU512AddS(_:_:_:)](accelerate/vu512adds(_:_:_:).md)
- [vS512Add(_:_:_:)](accelerate/vs512add(_:_:_:).md)
- [vS512AddS(_:_:_:)](accelerate/vs512adds(_:_:_:).md)
- [vU1024Add(_:_:_:)](accelerate/vu1024add(_:_:_:).md)
- [vU1024AddS(_:_:_:)](accelerate/vu1024adds(_:_:_:).md)
- [vS1024Add(_:_:_:)](accelerate/vs1024add(_:_:_:).md)
- [vS1024AddS(_:_:_:)](accelerate/vs1024adds(_:_:_:).md)
- [vU256Sub(_:_:_:)](accelerate/vu256sub(_:_:_:).md)
- [vU256SubS(_:_:_:)](accelerate/vu256subs(_:_:_:).md)
- [vS256Sub(_:_:_:)](accelerate/vs256sub(_:_:_:).md)