switch inst.Op {
	default: // dst, sA, sB, ...
		switch len(args) {
		case 0:
			return op
		case 1:
			return fmt.Sprintf("%s %s", op, args[0])
		case 2:
			if inst.Op == COPY || inst.Op == PASTECC {
				return op + " " + args[0] + "," + args[1]
			}
			return op + " " + args[1] + "," + args[0]
		case 3:
			if reverseOperandOrder(inst.Op) {
				return op + " " + args[2] + "," + args[1] + "," + args[0]
			}

	"STDCCC",
	"TD",
	"SETB",
	"DWORD",
	"REMD",
	"REMDU",
	"HRFID",
	"POPCNTD",
	"POPCNTW",
	"POPCNTB",
	"CNTTZW",
	"CNTTZWCC",
	"CNTTZD",
	"CNTTZDCC",
	"COPY",
	"PASTECC",
	"DARN",
	"MADDHD",
	"MADDHDU",
	"MADDLD",
	"LVEBX",
	"LVEHX",
	"LVEWX",
	"LVX",
	"LVXL",
	"LVSL",
	"LVSR",
	"STVEBX",
	"STVEHX",
	"STVEWX",
	"STVX",
	"STVXL",

	ISEL CR7SO, R3, R4, R5          // 7ca327de
	POPCNTB R3, R4                  // 7c6400f4
	POPCNTW R3, R4                  // 7c6402f4
	POPCNTD R3, R4                  // 7c6403f4

	PASTECC R3, R4                  // 7c23270d
	COPY R3, R4                     // 7c23260c

	// load-and-reserve
	LBAR (R4)(R3*1),$1,R5           // 7ca32069
	LBAR (R4)(R0),$1,R5             // 7ca02069

	LXV
	LXVB16X
	LXVH8X
	LXVL
	LXVLL
	LXVWSX
	LXVX
	MADDHD
	MADDHDU
	MADDLD
	MCRXRX
	MFVSRLD
	MODSD
	MODSW
	MODUD
	MODUW
	MSGSYNC
	MTVSRDD
	MTVSRWS
	PASTECC
	SETB
	SLBIEG
	SLBSYNC
	STDAT
	STOP
	STWAT
	STXSD
	STXSIBX
	STXSIHX
	STXSSP
	STXV
	STXVB16X
	STXVH8X
	STXVL
	STXVLL
	STXVX
	VABSDUB
	VABSDUH
	VABSDUW