VPGATHERDQ (BP)(Y20*2), K1, Z20 // ERROR "index and destination registers should be distinct"
	// Instructions without EVEX variant can't use High-16 registers.
	VADDSUBPD X20, X1, X2           // ERROR "invalid instruction"
	VADDSUBPS X0, X20, X2           // ERROR "invalid instruction"
	// Use of K0 for write mask (Yknot0).
	// TODO(quasilyte): improve error message (#21860).

	VADDSUBPD X11, X9, X11                  // c44131d0db
	VADDSUBPD (BX), Y15, Y2                 // c4e105d013 or c585d013
	VADDSUBPD (R11), Y15, Y2                // c4c105d013
	VADDSUBPD Y2, Y15, Y2                   // c4e105d0d2 or c585d0d2
	VADDSUBPD Y11, Y15, Y2                  // c4c105d0d3
	VADDSUBPD (BX), Y15, Y11                // c46105d01b or c505d01b
	VADDSUBPD (R11), Y15, Y11               // c44105d01b