https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122967
Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |wilco at gcc dot gnu.org
--- Comment #3 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> And I'm not convinced func3 or func4 are desirable on x86_64.
The current generic isfinite results in this:
bool f(float x) { return __builtin_isfinite (x); }
andps xmm0, XMMWORD PTR .LC4[rip]
movss xmm1, DWORD PTR .LC5[rip]
xor eax, eax
ucomiss xmm1, xmm0
setnb al
ret
That's 40-bytes of immediates...
Func3/4 are still better than the above, and necessary if you use
-fsignaling-nans.
