[prev in list] [next in list] [prev in thread] [next in thread] 

List:       gcc-bugs
Subject:    [Bug c++/112789] Missing clang __builtin_ctzs for short
From:       "pinskia at gcc dot gnu.org via Gcc-bugs" <gcc-bugs () gcc ! gnu ! org>
Date:       2023-11-30 21:20:17
Message-ID: bug-112789-4-bUAqud1Cpy () http ! gcc ! gnu ! org/bugzilla/
[Download RAW message or body]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112789

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So just for future reference __builtin_c[lt]zs is for short.

But with GCC 14 (trunk) added __builtin_ct[lt]g, there is no need to add
__builtin_c[lt]zs to GCC.

You could just do:

#if __has_builtin(__builtin_ctzg) && !__has_builtin(__builtin_ctzs)
#define ctzs(a) __builtin_ctzg((short)a)
#elif __has_builtin(__builtin_ctzs)
#define ctzs(a) __builtin_ctzs((short)a)
#else
#error implement fall back for not both cases
#endif=
[prev in list] [next in list] [prev in thread] [next in thread]