https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106910
--- Comment #11 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to Hongtao.liu from comment #10) > Because the round insn does not trap on denormals. Note for scalar version, gcc generates roundss $9, %xmm0, %xmm0 which doesn't raise exception because it's allowed by the below option. ----- ffp-int-builtin-inexact Common Var(flag_fp_int_builtin_inexact) Init(1) Optimization Allow built-in functions ceil, floor, round, trunc to raise \"inexact\" exceptions. -----
