}
	switch a {
	case AMOVD:
		return OptionS<<10 | 0x3<<21 | 0x1f<<27
	case AMOVW:
		return OptionS<<10 | 0x5<<21 | 0x17<<27
	case AMOVWU:
		return OptionS<<10 | 0x3<<21 | 0x17<<27
	case AMOVH:
		return OptionS<<10 | 0x5<<21 | 0x0f<<27
	case AMOVHU:
		return OptionS<<10 | 0x3<<21 | 0x0f<<27
	case AMOVB:
		return OptionS<<10 | 0x5<<21 | 0x07<<27

	{AMOVO, yxmov, Pe, opBytes{0x6f, 0x7f}},
	{AMOVOU, yxmov, Pf3, opBytes{0x6f, 0x7f}},
	{AMOVHLPS, yxr, Pm, opBytes{0x12}},
	{AMOVHPD, yxmov, Pe, opBytes{0x16, 0x17}},
	{AMOVHPS, yxmov, Pm, opBytes{0x16, 0x17}},
	{AMOVL, ymovl, Px, opBytes{0x89, 0x8b, 0xb8, 0xc7, 00, 0x6e, 0x7e, Pe, 0x6e, Pe, 0x7e, 0}},
	{AMOVLHPS, yxr, Pm, opBytes{0x16}},
	{AMOVLPD, yxmov, Pe, opBytes{0x12, 0x13}},

	0x69, 0x76, 0x65, 0x00, 0x92, 0xef, 0xe6, 0xe0,
	0x60, 0x00, 0x83, 0xa2, 0xd4, 0xe4, 0xd2, 0xa2,
	0xe2, 0xcc, 0xb2, 0x54, 0x06, 0x00, 0x00, 0x17,
	0x00, 0xe8, 0xff, 0x92, 0xef, 0xe6, 0xe0, 0x60,
	0x00, 0x83, 0xa2, 0xd4, 0xe4, 0xd2, 0xa2, 0xe2,
	0xcc, 0xb2, 0x54, 0x06, 0x00, 0x00, 0x17, 0x00,
	0xe8, 0xff, 0x42, 0x12, 0x46, 0x16, 0x06, 0x00,
	0x05, 0x00, 0xfa, 0xff, 0x42, 0x12, 0x46, 0x16,