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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/114140] fmin/fmax with signaling_NaN not work Date: Tue, 27 Feb 2024 22:40:07 +0000 [thread overview] Message-ID: <bug-114140-4-ouWGItU9QB@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-114140-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114140 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|quadmath fminq/fmaxq with |fmin/fmax with |signaling_NaN not work |signaling_NaN not work --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- With `-fsignaling-nans` added, then we get the : inf inf nan nan so ... Even using float instead also cause the same output: ``` #include <type_traits> #include <iostream> #include <stdfloat> #include <limits> #include <cmath> int main() { { using T = float; using L = std::numeric_limits<T>; const T a = L::infinity(), b = L::quiet_NaN(), c = L::signaling_NaN(); std::cout << "float\n"; std::cout << std::fmin(a, b) << std::endl; std::cout << std::fmax(a, b) << std::endl; std::cout << std::fmin(a, c) << std::endl; std::cout << std::fmax(a, c) << std::endl; } } ``` So Looks like we convert sNaN to qNan if `-fsignaling-nans` is not supplied ...
next prev parent reply other threads:[~2024-02-27 22:40 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-02-27 21:09 [Bug libquadmath/114140] New: quadmath fminq/fmaxq " g.peterhoff@t-online.de 2024-02-27 22:14 ` [Bug libquadmath/114140] " jakub at gcc dot gnu.org 2024-02-27 22:20 ` jsm28 at gcc dot gnu.org 2024-02-27 22:36 ` [Bug middle-end/114140] " pinskia at gcc dot gnu.org 2024-02-27 22:40 ` pinskia at gcc dot gnu.org [this message] 2024-02-27 22:41 ` [Bug middle-end/114140] fmin/fmax " jakub at gcc dot gnu.org 2024-02-27 22:48 ` pinskia at gcc dot gnu.org 2024-02-28 0:59 ` [Bug middle-end/114140] different results for std::fmin/std::fmax and quadmath fminq/fmaxq if one argument=signaling_NaN g.peterhoff@t-online.de 2024-02-28 1:02 ` [Bug libquadmath/114140] " pinskia at gcc dot gnu.org 2024-02-28 1:04 ` pinskia at gcc dot gnu.org 2024-02-28 1:06 ` pinskia at gcc dot gnu.org 2024-02-28 1:07 ` pinskia at gcc dot gnu.org 2024-02-28 1:09 ` pinskia at gcc dot gnu.org 2024-02-28 1:55 ` g.peterhoff@t-online.de 2024-02-28 2:00 ` pinskia at gcc dot gnu.org 2024-02-28 8:12 ` rguenth at gcc dot gnu.org 2024-02-28 11:36 ` xry111 at gcc dot gnu.org 2024-02-28 12:35 ` rguenth at gcc dot gnu.org
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