Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1591

MOV—Move to/from Control Registers (Continued)
Flags Affected
The OF, SF, ZF, AF, PF, and CF flags are undefined.
Additional Itanium System Environment Exceptions
IA-32_Intercept
Protected Mode Exceptions
#GP(0)
Real Address Mode Exceptions
#GP
Virtual 8086 Mode Exceptions
#GP(0)
Volume 4: Base IA-32 Instruction Reference
Move To CR#, Mandatory Instruction Intercept.
Move From CR#, read the virtualized control register values,
CR0{15:6} return zeros.
If the current privilege level is not 0.
If an attempt is made to write a 1 to any reserved bit in CR4.
If an attempt is made to write reserved bits in the page-directory
pointers table (used in the extended physical addressing mode)
when the PAE flag in control register CR4 and the PG flag in control
register CR0 are set to 1.
If an attempt is made to write a 1 to any reserved bit in CR4.
These instructions cannot be executed in virtual 8086 mode.
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