https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63395
--- Comment #11 from bernardwidynski at gmail dot com --- Thanks for the information. I looked at the .s assembly files. 32-bit Cygwin uses the "fmul" instruction. 64-bit Cygwin uses the "mulsd" instruction. I tried -mpc64 on 32-bit Cygwin but got the same results. On Sat, Sep 27, 2014 at 4:09 PM, mikpelinux at gmail dot com < gcc-bugzi...@gcc.gnu.org> wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63395 > > --- Comment #10 from Mikael Pettersson <mikpelinux at gmail dot com> --- > I strongly suspect 32-bit Cygwin uses x87 by default, while 64-bit Cygwin > probably uses SSE2 by default. These two FP implementations are very > different, and it's not at all surprising to see different results from > them. > > Try compiling with -mpc64 on 32-bit Cygwin. > > -- > You are receiving this mail because: > You reported the bug. >
