[Bug target/52775] New: Change default for using FCFID instruction

[meissner at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52775

             Bug #: 52775
           Summary: Change default for using FCFID instruction
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: meiss...@gcc.gnu.org
        ReportedBy: meiss...@gcc.gnu.org
              Host: powerpc64-linux power-linux
            Target: powerpc64-linux
             Build: powerpc64-linux


Back in August 2010, when I updated the floating point conversion support for
powerpc, I made the default for using the FCFID instruction to be any of: -m64,
-mpopcntb (power5), -mcmpb (power6), -mpopcntd (power7), -mvsx.  Evidently any
powerpc that can support 64-bit (even if the current target is 32-bit) has the
FCFID instruction.  So I would like to modify the trunk and active branches to
enable FCFID in 32-bit mode on power4.