Merge pull request #63 from cppalliance/arm64

Change macro for __umulh
boostorg · Aug 1, 2023 · c92eb9e · c92eb9e
2 parents f3682f7 + dba4773
commit c92eb9e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/boost/charconv/detail/emulated128.hpp b/include/boost/charconv/detail/emulated128.hpp
@@ -797,7 +797,7 @@ BOOST_CHARCONV_SAFEBUFFERS inline uint128 umul128(std::uint64_t x, std::uint64_t
  return {static_cast<std::uint64_t>(high), low};
 
  // https://developer.arm.com/documentation/dui0802/a/A64-General-Instructions/UMULH
- #elif defined(__arm__)
+ #elif defined(_M_ARM64) && !defined(__MINGW32__)
 
  std::uint64_t high = __umulh(x, y);
  std::uint64_t low = x * y;