(Add16 (Add16 i:(Const16 <t>) z) x) && (z.Op != OpConst16 && x.Op != OpConst16) => (Add16 i (Add16 <t> z x))
(Add8  (Add8  i:(Const8  <t>) z) x) && (z.Op != OpConst8  && x.Op != OpConst8)  => (Add8  i (Add8  <t> z x))

// x + (C - z) -> C + (x - z)
(Add64 (Sub64 i:(Const64 <t>) z) x) && (z.Op != OpConst64 && x.Op != OpConst64) => (Add64 i (Sub64 <t> x z))

// are signed or unsigned.

var genericOps = []opData{
	// 2-input arithmetic
	// Types must be consistent with Go typing. Add, for example, must take two values
	// of the same type and produces that same type.
	{name: "Add8", argLength: 2, commutative: true}, // arg0 + arg1
	{name: "Add16", argLength: 2, commutative: true},
	{name: "Add32", argLength: 2, commutative: true},
	{name: "Add64", argLength: 2, commutative: true},

			},
			outputs: []outputInfo{
				{0, 65535}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15
			},
		},
	},

	{
		name:        "Add8",
		argLen:      2,
		commutative: true,
		generic:     true,
	},
	{
		name:        "Add16",
		argLen:      2,
		commutative: true,
		generic:     true,
	},
	{