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From: "redi 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: Sat, 06 May 2023 22:57:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109758

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to g.peterhoff from comment #3)
> >> libstdc++ doesn't depend on libquadmath and the __float128 support is =
there very limited.
> Yes, exactly. There should be nothing of quadmath in the std implementati=
ons
> of C/C++. But in bits/std_abs.h this is the case.

I'm not sure what you mean. There is nothing from libquadmath there, what a=
re
you referring to as "quadmath"? Just any use of 128-bit floating-point type=
s?


> >> Use std::float128_t instead (in GCC 13.1)?
> std::float128_t can only be used from C++23 on, but quadmath can also be
> used with older standard/compiler versions.

Again, what do you mean by "quadmath"?=