BTL R11, R11                            // 450fa3db
	BTQ $7, (BX)                            // 480fba2307
	BTQ $7, (R11)                           // 490fba2307
	BTQ $7, DX                              // 480fbae207
	BTQ $7, R11                             // 490fbae307
	BTQ DX, (BX)                            // 480fa313
	BTQ R11, (BX)                           // 4c0fa31b
	BTQ DX, (R11)                           // 490fa313

		if !(c > d) {
			break
		}
		v.reset(OpAMD64BTLconst)
		v.AuxInt = int8ToAuxInt(c - d)
		v.AddArg(x)
		return true
	}
	// match: (BTLconst [0] s:(SHRQ x y))
	// result: (BTQ y x)
	for {
		if auxIntToInt8(v.AuxInt) != 0 {
			break
		}
		s := v_0
		if s.Op != OpAMD64SHRQ {
			break
		}
		y := s.Args[1]
		x := s.Args[0]
		v.reset(OpAMD64BTQ)