When compressing x87 and XMMs, treat as raw bytes.
When compressing x87 and XMMs, treat as raw bytes.

Doesn't affect performance, but guards us from subtle
bugs with the handling of NaNs and the like.

Change-Id: I93937bbf94b3aa43b8374addb524b58a277e5fdc

s-kanev/XIOSim,s-kanev/XIOSim,s-kanev/XIOSim,s-kanev/XIOSim