https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84377
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Tried to reproduce this with: pr84377-test.c: extern _Float128 truncf128 (_Float128); int main () { _Float128 f = truncf128 (1.625); if (f != 1.0) __builtin_abort (); return 0; } pr84377.i (#c0 attachment). gcc -m32 -O2 -std=gnu11 -fgnu89-inline -fno-strict-aliasing -frounding-math -fstack-protector-all -march=native -fPIC pr84377-test.c pr84377.i -o pr84377-test with gcc version 7.3.1 20180130 (Red Hat 7.3.1-2) (GCC) but it doesn't fail for me, does it for you? What does -march=native expand for you (add -v and show the options passed to cc1)?