https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127055
--- Comment #3 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
Right, for round I understand. But why is using the packed vround/vrndscale
instruction (rather than the scalar one) gated on -fno-trapping-math? There is
no observable difference between e.g.
"test_v2df_ceil(double __vector(2))":
vrndscalesd xmm1, xmm0, xmm0, 10
vunpckhpd xmm0, xmm0, xmm0
vrndscalesd xmm0, xmm0, xmm0, 10
vunpcklpd xmm0, xmm1, xmm0
ret
and
"test_v2df_ceil(double __vector(2))":
vrndscalepd xmm0, xmm0, 10
ret
