add the interim gem5 conversion with ctest

GEM5 TAGE and SimpleBTB were converted to Sparta units,
w/ Map style parameters and stats.

this is a draft, next to zero cycles have been run on the
conversion.

next steps might be to integrate with the existing BP API
and create some external training data.

test/CMakeLists.txt

@@ -33,4 +33,5 @@ add_subdirectory(core/rename)
 add_subdirectory(core/lsu)
 add_subdirectory(core/issue_queue)
 add_subdirectory(core/branch_pred)
+add_subdirectory(core/bpu)
 add_subdirectory(fusion)

test/core/bpu/CMakeLists.txt

@@ -0,0 +1,75 @@
+set(PRJ "BPU")
+set(EXE "${PRJ}_tb") 
+
+project(${PRJ})
+
+# There are 2 tests
+# 1 - basic no options - sanity check
+# 2 - (z)stf input-file
+set(TST1 "${PRJ}_test")
+set(TST2 "${PRJ}_stf_test")
+
+# Test args
+set(STF traces/basic.stf)
+
+# Test cfg : there is a single config for the unit bench
+set(CFG configs/bpu.yaml)
+
+file(CREATE_LINK ${SIM_BASE}/mavis/json
+                 ${CMAKE_CURRENT_BINARY_DIR}/mavis_isa_files SYMBOLIC)
+
+file(CREATE_LINK ${SIM_BASE}/arches
+                 ${CMAKE_CURRENT_BINARY_DIR}/arches SYMBOLIC)
+
+file(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/traces
+                 ${CMAKE_CURRENT_BINARY_DIR}/traces SYMBOLIC)
+
+file(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/configs
+                 ${CMAKE_CURRENT_BINARY_DIR}/configs SYMBOLIC)
+
+file(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/json
+                 ${CMAKE_CURRENT_BINARY_DIR}/json SYMBOLIC)
+
+file(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/traces
+                 ${CMAKE_CURRENT_BINARY_DIR}/traces SYMBOLIC)
+
+file(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/expected_output
+                 ${CMAKE_CURRENT_BINARY_DIR}/expected_output SYMBOLIC)
+
+add_executable(${EXE}
+               dut.cpp
+               src.cpp
+               testbench.cpp
+               bpuinfo.cpp
+               uarch/Gem5Tage.cpp
+               uarch/SimpleBTB.cpp)
+
+target_include_directories(${EXE} PRIVATE 
+                           ${CMAKE_CURRENT_SOURCE_DIR} )
+
+target_link_libraries(${EXE}
+                      core
+                      common_test
+                      ${STF_LINK_LIBS}
+                      mavis
+                      SPARTA::sparta)
+
+sparta_named_test(${TST1} ${EXE} tb.out -c ${CFG})
+sparta_named_test(${TST2} ${EXE} tb_stf.out  --input_file ${STF}  -c ${CFG})
+
+find_package(Doxygen)
+if(DOXYGEN_FOUND)
+    set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile)
+    set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxygen)
+
+    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
+
+    add_custom_target(bpu_docs
+                      COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
+                      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                      COMMENT "Generating API documentation with Doxygen"
+                      VERBATIM)
+else()
+    message("Doxygen needs to be installed to generate documentation")
+endif()
+