Code update for CPU models.

Code update for CPU models.

arch/alpha/isa_traits.hh:
    Add in clear functions.
cpu/base.cc:
cpu/base.hh:
    Add in CPU progress event.
cpu/base_dyn_inst.hh:
    Mimic normal registers in terms of writing/reading floats.
cpu/checker/cpu.cc:
cpu/checker/cpu.hh:
cpu/checker/cpu_builder.cc:
cpu/checker/o3_cpu_builder.cc:
    Fix up stuff.
cpu/cpu_exec_context.cc:
cpu/cpu_exec_context.hh:
cpu/o3/cpu.cc:
cpu/o3/cpu.hh:
    Bring up to speed with newmem.
cpu/o3/alpha_cpu_builder.cc:
    Allow for progress intervals.
cpu/o3/tournament_pred.cc:
    Fix up predictor.
cpu/o3/tournament_pred.hh:
cpu/ozone/cpu.hh:
cpu/ozone/cpu_impl.hh:
cpu/simple/cpu.cc:
    Fixes.
cpu/ozone/cpu_builder.cc:
    Allow progress interval.
cpu/ozone/front_end_impl.hh:
    Comment out this message.
cpu/ozone/lw_back_end_impl.hh:
    Remove this.
python/m5/objects/BaseCPU.py:
    Add progress interval.
python/m5/objects/Root.py:
    Allow for stat reset.
sim/serialize.cc:
sim/stat_control.cc:
    Add in stats reset.

--HG--
extra : convert_revision : fdb5ac5542099173cc30c40ea93372a065534b5e