[Bug c/46041] __FP_FAST_FMA not defined with -E

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46041

--- Comment #2 from Richard Henderson <rth at gcc dot gnu.org> 2010-10-15 
23:01:19 UTC ---
I think the easiest solution is to simply do

  switch (mode)
    {
    case SFmode:
#ifdef HAVE_fmasf4
      return HAVE_fmasf4;
#endif
      break;
    ...
    }
  return false;

instead of the optab_handler lookup.