Changeset 10672 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

Jul 15, 2008 3:32:21 PM (17 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

33385

Message:

Added a comment about the fact that we trash our own FPU state. Could be an issue with code relying on the FPU control word
to remain the same during the lifetime of the thread.

File:

• trunk/src/VBox/VMM/VMMR0/HWACCMR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HWACCMR0.cpp

@@ -771 +771 @@
      */
 
-    /* Restore host FPU and XMM state if necessary. */
+    /*
+     * @note We are trashing our own FPU state. That could be a problem if some ring 3 code relies on the FPU control
+     *       word having a specific value (exceptions, precision etc).
+     */
+    /* Save the guest FPU and XMM state if necessary. */
     if (CPUMIsGuestFPUStateActive(pVM))
     {