// Make sure MOV CR/DR continues to work after changing its movtabs.
	MOVL CR0, AX // 0f20c0
	MOVL CR0, DX // 0f20c2
	MOVL CR4, DI // 0f20e7
	MOVL AX, CR0 // 0f22c0
	MOVL DX, CR0 // 0f22c2
	MOVL DI, CR4 // 0f22e7
	MOVL DR0, AX // 0f21c0
	MOVL DR6, DX // 0f21f2
	MOVL DR7, SI // 0f21fe
	// Test other movtab entries.
	PUSHL SS // 16
	PUSHL FS // 0fa0
	POPL FS  // 0fa1
	POPL SS  // 17

	MOVQ (AX), CR8                  // ERROR "invalid instruction"
	MOVQ DR0, (AX)                  // ERROR "invalid instruction"
	MOVQ DR2, (AX)                  // ERROR "invalid instruction"
	MOVQ DR3, (AX)                  // ERROR "invalid instruction"
	MOVQ DR6, (AX)                  // ERROR "invalid instruction"
	MOVQ DR7, (AX)                  // ERROR "invalid instruction"
	MOVQ (AX), DR0                  // ERROR "invalid instruction"