https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68211
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |NEW
Last reconfirmed|2016-04-19 00:00:00 |2019-3-4
--- Comment #7 from Steven Bosscher <steven at gcc dot gnu.org> ---
"g++ (Compiler-Explorer-Build) 9.0.1 20190303 (experimental)":
#include <x86intrin.h>
double sqrt_up(double x){
__m128d y = { x, 0 };
return _mm_cvtsd_f64(_mm_sqrt_round_sd(y, y,
_MM_FROUND_TO_POS_INF|_MM_FROUND_NO_EXC));
}
double f(double x)
{
return __builtin_sqrt(x);
}
sqrt_up(double):
vmovq %xmm0, %xmm0
vsqrtsd {ru-sae}, %xmm0, %xmm0, %xmm0
ret
f(double):
vsqrtsd %xmm0, %xmm0, %xmm0
ret
