Change intermediate mul type for clang 6-12

cppalliance · Jun 25, 2024 · 3ca6e64 · 3ca6e64
1 parent a8f3259
commit 3ca6e64
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/include/boost/decimal/detail/mul_impl.hpp b/include/boost/decimal/detail/mul_impl.hpp
@@ -105,7 +105,8 @@ BOOST_DECIMAL_FORCE_INLINE constexpr auto d64_mul_impl(T lhs_sig, U lhs_exp, boo
  T rhs_sig, U rhs_exp, bool rhs_sign) noexcept
  -> std::enable_if_t<detail::is_decimal_floating_point_v<ReturnType>, ReturnType>
 {
- #ifdef BOOST_DECIMAL_HAS_INT128
+ // Clang 6-12 yields incorrect results with builtin u128, so we force usage of our version
+ #if defined(BOOST_DECIMAL_HAS_INT128) && (!defined(__clang_major__) || (__clang_major__) > 12)
  using unsigned_int128_type = boost::decimal::detail::uint128_t;
  #else
  using unsigned_int128_type = boost::decimal::detail::uint128;