---
title: vU128SubS
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.0+]
path: kernel/1411113-vu128subs
---

# vU128SubS

Unsigned 128-bit subtraction with saturation (clipping).

## Declaration

```occ
vUInt32 vU128SubS(vUInt32 vA, vUInt32 vB);
```