TEXT asmtest(SB),DUPOK|NOSPLIT,$0
	// Instructions that were encoded with BYTE sequences.
	// Included to simplify validation of CL that fixed that.
	MOVQ (AX), M0  // 0f6f00
	MOVQ M0, 8(SP) // 0f7f442408
	MOVQ 8(SP), M0 // 0f6f442408
	MOVQ M0, (AX)  // 0f7f00
	MOVQ M0, (BX)  // 0f7f03
	// On non-64bit arch, Go asm allowed uint32 offsets instead of int32.
	// These tests check that property for backwards-compatibility.

	CMPL runtime·writeBarrier(SB), $0
	MOVQ (R15), AX // ERROR "when dynamic linking, R15 is clobbered by a global variable access and is used here"
	RET
TEXT ·a18(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0
	MOVQ (CX)(R15*1), AX // ERROR "when dynamic linking, R15 is clobbered by a global variable access and is used here"
	RET
TEXT ·a19(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0

	MOVQ (AX), CR3                  // ERROR "invalid instruction"
	MOVQ (AX), CR4                  // ERROR "invalid instruction"
	MOVQ (AX), CR8                  // ERROR "invalid instruction"
	MOVQ DR0, (AX)                  // ERROR "invalid instruction"
	MOVQ DR2, (AX)                  // ERROR "invalid instruction"
	MOVQ DR3, (AX)                  // ERROR "invalid instruction"

  x.go:3		0x10501c0		65488b0c2530000000	MOVQ GS:0x30, CX
  x.go:3		0x10501c9		483b6110		CMPQ 0x10(CX), SP
  x.go:3		0x10501cd		7634			JBE 0x1050203
  x.go:3		0x10501cf		4883ec10		SUBQ $0x10, SP
  x.go:3		0x10501d3		48896c2408		MOVQ BP, 0x8(SP)
  x.go:3		0x10501d8		488d6c2408		LEAQ 0x8(SP), BP
  x.go:4		0x10501dd		e86e45fdff		CALL runtime.printlock(SB)
  x.go:4		0x10501e2		48c7042403000000	MOVQ $0x3, 0(SP)

	// Make sure MOV CR/DR continues to work after changing its movtabs.
	MOVQ CR0, AX // 0f20c0
	MOVQ CR0, DX // 0f20c2
	MOVQ CR4, DI // 0f20e7
	MOVQ AX, CR0 // 0f22c0
	MOVQ DX, CR0 // 0f22c2
	MOVQ DI, CR4 // 0f22e7
	MOVQ DR0, AX // 0f21c0
	MOVQ DR6, DX // 0f21f2
	MOVQ DR7, SI // 0f21fe
	// Test other movtab entries.
	PUSHQ GS // 0fa8
	PUSHQ FS // 0fa0
	POPQ FS  // 0fa1