61 gcd(_Mn __m, _Nn __n)
noexcept
63 static_assert(is_integral_v<_Mn> && is_integral_v<_Nn>,
64 "std::experimental::gcd arguments must be integers");
65 static_assert(_Mn(2) == 2 && _Nn(2) == 2,
66 "std::experimental::gcd arguments must not be bool");
69 const _Ct __m2 = __detail::__abs_r<_Ct>(__m);
70 const _Ct __n2 = __detail::__abs_r<_Ct>(__n);
71 return __detail::__gcd<make_unsigned_t<_Ct>>(__m2, __n2);
79 static_assert(is_integral_v<_Mn> && is_integral_v<_Nn>,
80 "std::experimental::lcm arguments must be integers");
81 static_assert(_Mn(2) == 2 && _Nn(2) == 2,
82 "std::experimental::lcm arguments must not be bool");
85 const _Ct __m2 = __detail::__abs_r<_Ct>(__m);
86 const _Ct __n2 = __detail::__abs_r<_Ct>(__n);
87 if (__m2 == 0 || __n2 == 0)
89 _Ct __r = __m2 / __detail::__gcd<make_unsigned_t<_Ct>>(__m2, __n2);
91 if _GLIBCXX17_CONSTEXPR (is_signed_v<_Ct>)
92 if (__is_constant_evaluated())
95 bool __overflow = __builtin_mul_overflow(__r, __n2, &__r);
96 __glibcxx_assert(!__overflow);