AMDGPU: Split amdgcn/r600 fminnum/fmaxnum tests

R600 breaks on too many things to usefully test changes
with ieee_mode on vs. off.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338435 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed