require ARM64 for __umulh

boostorg · Jul 23, 2023 · 69f89e9 · 69f89e9
1 parent b8ccd14
commit 69f89e9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/boost/json/detail/charconv/detail/emulated128.hpp b/include/boost/json/detail/charconv/detail/emulated128.hpp
@@ -80,7 +80,7 @@ BOOST_JSON_SAFEBUFFERS inline uint128 umul128(std::uint64_t x, std::uint64_t y)
     return {high, low};
 
     // https://developer.arm.com/documentation/dui0802/a/A64-General-Instructions/UMULH
-    #elif defined(__arm__)
+    #elif defined(__aarch64__)
 
     std::uint64_t high = __umulh(x, y);
     std::uint64_t low = x * y;