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