LZCNTL (BX), DX                         // f30fbd13
	LZCNTL (R11), DX                        // f3410fbd13
	LZCNTL DX, DX                           // f30fbdd2
	LZCNTL R11, DX                          // f3410fbdd3
	LZCNTL (BX), R11                        // f3440fbd1b
	LZCNTL (R11), R11                       // f3450fbd1b
	LZCNTL DX, R11                          // f3440fbdda

		v1.AddArg(x)
		v0.AddArg2(v1, v1)
		v.AddArg(v0)
		return true
	}
	// match: (BitLen16 <t> x)
	// cond: buildcfg.GOAMD64 >= 3
	// result: (NEGQ (ADDQconst <t> [-32] (LZCNTL (MOVWQZX <x.Type> x))))
	for {
		t := v.Type
		x := v_0
		if !(buildcfg.GOAMD64 >= 3) {
			break
		}
		v.reset(OpAMD64NEGQ)
		v0 := b.NewValue0(v.Pos, OpAMD64ADDQconst, t)