//    Multiplication    //
// -------------------- //

func Pow2Muls(n1, n2 int) (int, int) {
	// amd64:"SHLQ\t[$]5",-"IMULQ"
	// 386:"SHLL\t[$]5",-"IMULL"
	// arm:"SLL\t[$]5",-"MUL"
	// arm64:"LSL\t[$]5",-"MUL"
	// ppc64x:"SLD\t[$]5",-"MUL"
	a := n1 * 32

	// amd64:"SHLQ\t[$]6",-"IMULQ"
	// 386:"SHLL\t[$]6",-"IMULL"
	// arm:"SLL\t[$]6",-"MUL"
	// arm64:`NEG\sR[0-9]+<<6,\sR[0-9]+`,-`LSL`,-`MUL`

//    bits.Mul*    //
// --------------- //

func Mul(x, y uint) (hi, lo uint) {
	// amd64:"MULQ"
	// arm64:"UMULH","MUL"
	// ppc64x:"MULHDU","MULLD"
	// s390x:"MLGR"
	// mips64: "MULVU"
	// riscv64:"MULHU","MUL"
	return bits.Mul(x, y)
}

func Mul64(x, y uint64) (hi, lo uint64) {
	// amd64:"MULQ"
	// arm64:"UMULH","MUL"
	// ppc64x:"MULHDU","MULLD"
	// s390x:"MLGR"
	// mips64: "MULVU"

	{AMPSADBW, yxshuf, Pq, opBytes{0x3a, 0x42, 0}},
	{AMULB, ydivb, Pb, opBytes{0xf6, 04}},
	{AMULL, ydivl, Px, opBytes{0xf7, 04}},
	{AMULPD, yxm, Pe, opBytes{0x59}},
	{AMULPS, yxm, Ym, opBytes{0x59}},
	{AMULQ, ydivl, Pw, opBytes{0xf7, 04}},
	{AMULSD, yxm, Pf2, opBytes{0x59}},
	{AMULSS, yxm, Pf3, opBytes{0x59}},
	{AMULW, ydivl, Pe, opBytes{0xf7, 04}},
	{ANEGB, yscond, Pb, opBytes{0xf6, 03}},

		commutative:  true,
		clobberFlags: true,
		asm:          x86.AMULQ,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 1},     // AX
				{1, 49151}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R15
			},
			clobbers: 4, // DX
			outputs: []outputInfo{
				{1, 0},
				{0, 1}, // AX
			},
		},
	},
	{
		name:         "HMULQ",
		argLen:       2,
		clobberFlags: true,