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• 5.1 General-Purpose Instructions

5.1.14 User Mode Extended State Save/Restore Instructions

None of these instructions are implemented.

Additionally, XSAVEC (0x0FC7 /4) seems to be missing from the opcode maps.

Unimplemented Instructions

Opcode	Mnemonic	Other Information	Semantic Function
0F 01	XGETBV	:REG 3 :MOD 3 :R/M 0 :FEAT :XSAVE
NP 0F AE	XSAVE	:PFX :NO-PREFIX :REG 4 :MOD :MEM :FEAT :XSAVE
NP 0F AE	XRSTOR	:PFX :NO-PREFIX :REG 5 :MOD :MEM :FEAT :XSAVE
NP 0F AE	XSAVEOPT	:PFX :NO-PREFIX :REG 6 :MOD :MEM