---
title: fpu_mxcsr
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 10.4+]
path: kernel/x86_float_state64_t/1397286-fpu_mxcsr
---

# fpu_mxcsr

## Declaration

```occ
__uint32_t fpu_mxcsr;
```