}
		}

	case 0:
		// ok
	}

	switch inst.Op {
	case INSB, INSD, INSW, OUTSB, OUTSD, OUTSW, MONITOR, MWAIT, XLATB:
		iargs = nil

	case STOSB, STOSW, STOSD, STOSQ:
		iargs = iargs[:1]

	case LODSB, LODSW, LODSD, LODSQ, SCASB, SCASW, SCASD, SCASQ:
		iargs = iargs[1:]
	}

	const (
		haveData16 = 1 << iota
		haveData32
		haveAddr16
		haveAddr32

	case STDCXCC, STWCXCC, STHCXCC, STBCXCC:
		return op + " " + args[0] + ",(" + args[2] + ")(" + args[1] + ")"

	case STXVX, STXVD2X, STXVW4X, STXVH8X, STXVB16X, STXSDX, STVX, STVXL, STVEBX, STVEHX, STVEWX, STXSIWX, STFDX, STFDUX, STFDPX, STFSX, STFSUX:
		return op + " " + args[0] + ",(" + args[2] + ")(" + args[1] + ")"

	case STXV:
		return op + " " + args[0] + "," + args[1]

			haveDS = true
		case ES:
			haveES = true
		case FS:
			haveFS = true
		case GS:
			haveGS = true
		case SS:
			haveSS = true
		}
		switch inst.Op {
		case INSB, INSW, INSD, STOSB, STOSW, STOSD, STOSQ, SCASB, SCASW, SCASD, SCASQ:
			// These do not accept segment prefixes, at least in the GNU rendering.
		default:
			if *usedPrefixes {
				break
			}
			for i := len(inst.Prefix) - 1; i >= 0; i-- {

	PSTQ R2, $1, 12345678(R2)               // 041000bcf042614e
	PSTW R1, $1, 12345678(R2)               // 061000bc9022614e
	PSTW R24, $0, 45(R13)                   // 06000000930d002d
	PSTXSD V1, $1, 12345678(R2)             // 041000bcb822614e
	PSTXSSP V1, $1, 1234567890(R0)          // 04104996bc2002d2
	PSTXSSP V1, $1, 1234567890(R1)          // 04104996bc2102d2

		usedAddrSize = true

	case STOSB, STOSW, STOSD, STOSQ:
		inst.Args[0] = Mem{Segment: ES, Base: baseRegForBits(addrMode) + DI - AX}
		switch inst.Op {
		case STOSB:
			inst.Args[1] = AL
		case STOSW:
			inst.Args[1] = AX
		case STOSD:
			inst.Args[1] = EAX
		case STOSQ:
			inst.Args[1] = RAX
		}
		usedAddrSize = true

	"HASHCHK",
	"XXSPLTIW",
	"XXSPLTIDP",
	"XXSPLTI32DX",
	"XXPERMX",
	"XXEVAL",
	"XXBLENDVW",
	"XXBLENDVH",
	"XXBLENDVD",
	"XXBLENDVB",
	"PSTXVP",
	"PSTXV",
	"PSTXSSP",
	"PSTXSD",
	"PSTW",
	"PSTQ",
	"PSTH",
	"PSTFS",
	"PSTFD",
	"PSTD",
	"PSTB",
	"PNOP",
	"PMXVI8GER4SPP",
	"PMXVI8GER4PP",
	"PMXVI8GER4",
	"PMXVI4GER8PP",
	"PMXVI4GER8",