---
title: vS128Add
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.0+]
path: kernel/1411115-vs128add
---

# vS128Add

Signed 128-bit addition (modular arithmetic).

## Declaration

```occ
vSInt32 vS128Add(vSInt32 vA, vSInt32 vB);
```