VPGATHERDD Y2, (BP)(Y7*2), Y1           // c4e26d904c7d00
	VPGATHERDD X12, (R13)(X14*2), X11       // c40219905c7500
	VPGATHERDD Y12, (R13)(Y14*2), Y11       // c4021d905c7500
	VPGATHERDD X3, 8(X4*1), X6              // c4e26190342508000000
	VPGATHERDD X3, -8(X4*1), X6             // c4e261903425f8ffffff
	VPGATHERDD X3, 0(X4*1), X6              // c4e26190342500000000
	VPGATHERDD X3, 664(X4*1), X6            // c4e26190342598020000

	VPGATHERDQ Y5, 664(Y14*8), Y6   // ERROR "invalid instruction"
	VPGATHERQQ X2, (BP)(Y7*2), X1   // ERROR "invalid instruction"
	// VM/Y rejects X index register.
	VPGATHERQQ Y2, (BP)(X7*2), Y1   // ERROR "invalid instruction"
	VPGATHERDD Y5, -8(X14*8), Y6    // ERROR "invalid instruction"
	// No VSIB for legacy instructions.
	MOVL (AX)(X0*1), AX             // ERROR "invalid instruction"
	MOVL (AX)(Y0*1), AX             // ERROR "invalid instruction"

	"VPERMT2PS",
	"VPERMT2Q",
	"VPERMT2W",
	"VPERMW",
	"VPEXPANDB",
	"VPEXPANDD",
	"VPEXPANDQ",
	"VPEXPANDW",
	"VPEXTRB",
	"VPEXTRD",
	"VPEXTRQ",
	"VPEXTRW",
	"VPGATHERDD",
	"VPGATHERDQ",
	"VPGATHERQD",
	"VPGATHERQQ",
	"VPHADDD",
	"VPHADDSW",
	"VPHADDW",
	"VPHMINPOSUW",
	"VPHSUBD",
	"VPHSUBSW",
	"VPHSUBW",
	"VPINSRB",
	"VPINSRD",

	VPGATHERDD (DX)(X10*4), K6, X3                     // 62b27d0e901c92
	VPGATHERDD (SP)(X4*2), K6, X3                      // 62f27d0e901c64
	VPGATHERDD (R14)(X29*8), K6, X3                    // 62927d06901cee
	VPGATHERDD (R10)(Y29*8), K3, Y22                   // 62827d239034ea
	VPGATHERDD (SP)(Y4*2), K3, Y22                     // 62e27d2b903464