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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/109758] std::abs(__float128) doesn't support NaN
Date: Mon, 08 May 2023 08:47:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109758

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We'd need to bitcast with
  struct
  {
#if __BYTE_ORDER__ =3D=3D __ORDER_BIG_ENDIAN__
    uint64_t __high;
    uint64_t __low;
#else
    uint64_t __low;
    uint64_t __high;
#endif
  } __words64;
};
and back (we can't use __uint128_t unconditionally).=