// match: (Ctz16 <t> x)
	// result: (CLZW <t> (RBITW <typ.UInt32> (ORconst <typ.UInt32> [0x10000] x)))
	for {
		t := v.Type
		x := v_0
		v.reset(OpARM64CLZW)
		v.Type = t
		v0 := b.NewValue0(v.Pos, OpARM64RBITW, typ.UInt32)
		v1 := b.NewValue0(v.Pos, OpARM64ORconst, typ.UInt32)
		v1.AuxInt = int64ToAuxInt(0x10000)
		v1.AddArg(x)
		v0.AddArg(v1)
		v.AddArg(v0)
		return true
	}
}