From: Vcode2407 <vkslog69@gmail.com>
Subject: [PATCH] Fix fallback uint128 bitwise not in bundled fmt

Origin: https://github.com/fmtlib/fmt/pull/4813

The fallback uint128 type is used on targets without native __int128.
format_hexfloat needs its missing bitwise-not operator.

--- a/3rdparty/fmtlib/fmt/format.h
+++ b/3rdparty/fmtlib/fmt/format.h
@@ -298,6 +298,9 @@ class uint128 {
       -> uint128 {
     return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
   }
+  friend constexpr auto operator~(const uint128& n) -> uint128 {
+    return {~n.hi_, ~n.lo_};
+  }
   friend FMT_CONSTEXPR auto operator+(const uint128& lhs, const uint128& rhs)
       -> uint128 {
     auto result = uint128(lhs);