---
title: vU128Sub
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.0+]
path: kernel/1411108-vu128sub
---

# vU128Sub

Unsigned 128-bit subtraction (modular arithmetic).

## Declaration

```occ
vUInt32 vU128Sub(vUInt32 vA, vUInt32 vB);
```