Signed-off-by: Knute Lingaard <knute.lingaard@sifive.com>

Adding a cast to get past the conversion error encountered during build.

Added a few additional LSU statistics. 

Output from running dhrystone trace:

```
        top.cpu.core0.lsu
            lsu_insts_dispatched                              = 5850001
            stores_retired                                    = 5850001
            lsu_insts_issued                                  = 11700073
            lsu_insts_completed                               = 5849999
            lsu_flushes                                       = 0
            tlb_hits                                          = 5850001
            tlb_misses                                        = 16
            dl1_cache_hits                                    = 5850000
            dl1_cache_misses                                  = 55
            biu_reqs                                          = 19

          top.cpu.core0.lsu.tlb
              tlb_hits                                        = 5850001
```

I will further look into the stats to make sure that they make sense.
But the added stats can now be used for the purpose of the demo.

The next step is adding rename function to let instructions fly via
Scoreboard 🙂

Couple of issues fixed and cleaned up:

- Logger cleanup
- Fetch credit bug fix (fixes #23)
- Logger pure virtual call in Retire -- deleted inst pointer before done
with it!
- Added `isDone` to stop fetching when the trace is finished

In this PR, Execute is now it's own node and dynamically creates
execution pipes based on extensions listed in the
config files:
```
top.cpu.core0.extension.core_extensions:
  execution_topology:
  [["alu", "6"],
   ["fpu", "2"],
   ["br",  "2"]]
```

Work done;
- Added new class `Dispatcher` that is dynamically created by `Dispatch`
for each execution pipe defined in the `execution_topology` extension
- Added new class `Execute` that is a node created for the sole purpose
of dynamically creating the `ExecutePipe` objects based on the
`execution_topology` extension
- Cleaned up old code
- Reduced the `CPUTopology` structure to just static components like
Fetch, Decode, Rename, Dispatch, Execute, LS/etc, and Retire
- Updated the arches to include a small, medium, and big core. Dhrystone
trace improves with each architecture, but is limited by LS.

Signed-off-by: Knute Lingaard <knute.lingaard@sifive.com>
Co-authored-by: Zhen Wei <zhen.wei@sifive.com>

To facilitate dynamic execution topologies (what that means: being able
to add/subtract ALUs, branch units, FP units, etc), a Dispatch tester is
in order to ensure it's working properly.

This PR adds:

1. A Dispatch tester class
2. Generic Source/Sink classes for instruction groups or single
instruction
3. A more structured build environment
4. First cut of topology yaml files + core extensions

Fix typo

Signed-off-by: avinash mehta <avinash.mehta@imgtec.com>

Fixed issues found during demo

Thanks, Pete!

Signed-off-by: Knute <56927209+klingaard@users.noreply.github.com>

Fixed README commands that were out of date
Fixed total_insts_executed stat
Fixed error where --no-run still required a workload

Signed-off-by: Knute <56927209+klingaard@users.noreply.github.com>

Signed-off-by: Knute <56927209+klingaard@users.noreply.github.com>

Signed-off-by: Knute <56927209+klingaard@users.noreply.github.com>

* First cut of adding stf library
* Fixed warnings from llvm on Mac
* Added directions and README to generate traces
* More documentation updates
* Moved mavis sha
* Regression is running again

Co-authored-by: Knute Lingaard <Knute.Lingaard@sifive.com>

* Mavis added as a submodule

* Mavis is installed and compiling!  Not used yet

* Mavis instantiated; complains about no uarch files: good!

* Updated mavis to gcc branch fixes

* Mavis is now installed and loading arch files

* Workload added and passed to Fetch

* Now have json files running

* Olympia can now run json traces

* Updated documentation -- still more work to do

* Updated documentation -- still more work to do

* Updated documentation -- still more work to do

* Declare InstPtr type within olympia namespace

* Removed outdated fetch param; tests still failing

* Added json test in regress

* Fixed LLVM compilation warnings

* Fixed conflicts

Co-authored-by: Knute Lingaard <Knute.Lingaard@sifive.com>
Co-authored-by: zen <zhen.wei@sifive.com>

* Added Argos layouts
* Added core 80 layout
* Added plotting support and updated README
* Fixed report; changed inst state to simple enum

* First cut olympia: a copy of sparta_core_example with a lot of cleanup and some speed enhancements
* Shaved 10% off of the simulation time