---
title: fpu_mxcsrmask
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 10.4+]
path: kernel/x86_float_state64_t/1397155-fpu_mxcsrmask
---

# fpu_mxcsrmask

## Declaration

```occ
__uint32_t fpu_mxcsrmask;
```