(Xor8  (Xor8  i:(Const8  <t>) z) x) && (z.Op != OpConst8  && x.Op != OpConst8)  => (Xor8  i (Xor8  <t> z x))

// x * (D * z) = D * (x * z)
(Mul64 (Mul64 i:(Const64 <t>) z) x) && (z.Op != OpConst64 && x.Op != OpConst64) => (Mul64 i (Mul64 <t> x z))
(Mul32 (Mul32 i:(Const32 <t>) z) x) && (z.Op != OpConst32 && x.Op != OpConst32) => (Mul32 i (Mul32 <t> x z))

(Select0 (Mul64uhilo x y)) => (MULHVU x y)
(Select1 (Mul64uhilo x y)) => (MULV x y)
(Select0 (Mul64uover x y)) => (MULV x y)
(Select1 (Mul64uover x y)) => (SGTU <typ.Bool> (MULHVU x y) (MOVVconst <typ.UInt64> [0]))

(Hmul64 ...)  => (MULHV  ...)
(Hmul64u ...) => (MULHVU ...)
(Hmul32 x y)  => (SRAVconst (MULV (SignExt32to64 x) (SignExt32to64 y)) [32])
(Hmul32u x y) => (SRLVconst (MULV (ZeroExt32to64 x) (ZeroExt32to64 y)) [32])

(Div64 x y) => (DIVV x y)

	{name: "Mul64", argLength: 2, commutative: true},
	{name: "Mul32F", argLength: 2, commutative: true},
	{name: "Mul64F", argLength: 2, commutative: true},

	{name: "Div32F", argLength: 2}, // arg0 / arg1
	{name: "Div64F", argLength: 2},

	{name: "Hmul32", argLength: 2, commutative: true},
	{name: "Hmul32u", argLength: 2, commutative: true},
	{name: "Hmul64", argLength: 2, commutative: true},

(Div16u x y) => (DIVUW (ZeroExt16to32 x) (ZeroExt16to32 y))
(Div8 x y)   => (DIVW  (SignExt8to32 x)  (SignExt8to32 y))
(Div8u x y)  => (DIVUW (ZeroExt8to32 x)  (ZeroExt8to32 y))

(Hmul64 ...)  => (MULH  ...)
(Hmul64u ...) => (MULHU ...)
(Hmul32 x y)  => (SRAI [32] (MUL  (SignExt32to64 x) (SignExt32to64 y)))
(Hmul32u x y) => (SRLI [32] (MUL  (ZeroExt32to64 x) (ZeroExt32to64 y)))

(Mul64uhilo ...) => (MULVU ...)
(Select0 (Mul64uover x y)) => (Select1 <typ.UInt64> (MULVU x y))
(Select1 (Mul64uover x y)) => (SGTU <typ.Bool> (Select0 <typ.UInt64> (MULVU x y)) (MOVVconst <typ.UInt64> [0]))

(Hmul64 x y) => (Select0 (MULV x y))
(Hmul64u x y) => (Select0 (MULVU x y))
(Hmul32 x y) => (SRAVconst (Select1 <typ.Int64> (MULV (SignExt32to64 x) (SignExt32to64 y))) [32])

(Add(Ptr|64|32|16|8) ...) => (ADD ...)
(Add(32|64)F ...) => (FADD(S|D) ...)

(Sub(Ptr|64|32|16|8) ...) => (SUB ...)
(Sub(32|64)F ...) => (FSUB(S|D) ...)

(Mul64 ...) => (MUL ...)
(Mul(32|16|8) ...) => (MULW ...)
(Mul(32|64)F  ...) => (FMUL(S|D) ...)

(Hmul64  ...) => (MULH ...)
(Hmul64u ...) => (UMULH ...)
(Hmul32  x y) => (SRAconst (MULL <typ.Int64> x y) [32])
(Hmul32u x y) => (SRAconst (UMULL <typ.UInt64> x y) [32])

			return true
		}
		break
	}
	// match: (Eq64 x (Mul64 (Const64 [c]) (Rsh64Ux64 mul:(Hmul64u (Const64 [m]) x) (Const64 [s])) ) )
	// cond: v.Block.Func.pass.name != "opt" && mul.Uses == 1 && m == int64(1<<63+umagic64(c).m/2) && s == umagic64(c).s-1 && x.Op != OpConst64 && udivisibleOK64(c)

	x6 := arg1[0]
	var x7 uint64
	var x8 uint64
	x8, x7 = bits.Mul64(x6, arg2[5])
	var x9 uint64
	var x10 uint64
	x10, x9 = bits.Mul64(x6, arg2[4])
	var x11 uint64
	var x12 uint64
	x12, x11 = bits.Mul64(x6, arg2[3])
	var x13 uint64
	var x14 uint64
	x14, x13 = bits.Mul64(x6, arg2[2])
	var x15 uint64
	var x16 uint64
	x16, x15 = bits.Mul64(x6, arg2[1])
	var x17 uint64
	var x18 uint64

	x2 := arg1[2]
	x3 := arg1[3]
	x4 := arg1[0]
	var x5 uint64
	var x6 uint64
	x6, x5 = bits.Mul64(x4, arg2[3])
	var x7 uint64
	var x8 uint64
	x8, x7 = bits.Mul64(x4, arg2[2])
	var x9 uint64
	var x10 uint64
	x10, x9 = bits.Mul64(x4, arg2[1])
	var x11 uint64
	var x12 uint64
	x12, x11 = bits.Mul64(x4, arg2[0])
	var x13 uint64
	var x14 uint64
	x13, x14 = bits.Add64(x12, x9, uint64(0x0))
	var x15 uint64

	r0 := uint128{"r0", GP64(), GP64()}
	mul64(r0, 1, l0, l0)
	addMul64(r0, 38, l1, l4)
	addMul64(r0, 38, l2, l3)

	// r1 = 2×l0×l1 + 19×2×l2×l4 + 19×l3×l3
	r1 := uint128{"r1", GP64(), GP64()}
	mul64(r1, 2, l0, l1)
	addMul64(r1, 38, l2, l4)
	addMul64(r1, 19, l3, l3)

	// r2 = = 2×l0×l2 + l1×l1 + 19×2×l3×l4
	r2 := uint128{"r2", GP64(), GP64()}
	mul64(r2, 2, l0, l2)
	addMul64(r2, 1, l1, l1)