Changeset 97258 in vbox for trunk/src/VBox

Timestamp:

Oct 20, 2022 3:31:34 PM (2 years ago)

Author:

vboxsync

Message:

IEM: Don't #UD on PREFETCHW if fLongMode is set; needs more work!

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllInstructionsTwoByte0f.cpp.h (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/IEMAllInstructionsTwoByte0f.cpp.h

@@ -2043 +2043 @@
 {
     /* AMD prefetch group, Intel implements this as NOP Ev (and so do we). */
-    if (!IEM_GET_GUEST_CPU_FEATURES(pVCpu)->f3DNowPrefetch)
+    if (!IEM_GET_GUEST_CPU_FEATURES(pVCpu)->fLongMode && !IEM_GET_GUEST_CPU_FEATURES(pVCpu)->f3DNowPrefetch)
     {
         IEMOP_MNEMONIC(GrpPNotSupported, "GrpP");