https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86160
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-17
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The x[sv]tdc[sdq]p insn needs ISA 3.0 (power9). For older CPUs that have
VSX it is probably best to look at the bit patterns; for even older CPUs,
the current default scheme of doing FP compares might be best.
Ideally FP compare vs. bitpattern tests can be handled generically; but
until such a time, yes we need to do it in target patterns. Confirmed.
