Crate xsave

This crate contains a practical implementation of the x86 xsave semantics.

We do not intend to support all possible variations of the instructures, nor do we intend to calculate the size of the xsave area dynamically. Instead, our practical strategy will overallocate the size of the xsave area so that we get a constant size for the struct. This allows for substantially easier embedding in other contexts.

For example, clearing the extended CPU state is a simple:

use xsave::XSave;

XSave::default().load();

Likewise, you can save and restore the extended CPU state like this:

use xsave::XSave;

let mut xsave = XSave::default();
xsave.save();
xsave.load();

Structs

Fcw

The x87 Floating Point Control Word

Fsw

The x87 Floating Point Unit (FPU) Status Word

Mm

An MMX register

MmField

An MMX register field

MxCsr

The MXCSR register

XCompBv

XCOMP_BV flags

XSave

An XSave buffer

XSaveHeader

The XSave Header Area

XSaveLegacy

The XSave Legacy Area

XStateBv

XSTATE_BV flags

Xmm

An XMM register