VPGATHERDQ X2, 664(X2*8), X2    // ERROR "mask, index, and destination registers should be distinct"
	VPGATHERDQ X2, 664(X2*8), X7    // ERROR "mask, index, and destination registers should be distinct"
	VPGATHERDQ X2, 664(X7*8), X2    // ERROR "mask, index, and destination registers should be distinct"
	VPGATHERDQ X7, 664(X2*8), X2    // ERROR "mask, index, and destination registers should be distinct"

	VPGATHERDQ Y0, 0(X4*1), Y6              // c4e2fd90342500000000
	VPGATHERDQ Y0, 664(X4*1), Y6            // c4e2fd90342598020000
	VPGATHERDQ Y0, 8(X4*8), Y6              // c4e2fd9034e508000000
	VPGATHERDQ Y0, -8(X4*8), Y6             // c4e2fd9034e5f8ffffff
	VPGATHERDQ Y0, 0(X4*8), Y6              // c4e2fd9034e500000000
	VPGATHERDQ Y0, 664(X4*8), Y6            // c4e2fd9034e598020000