Vortex 2.0 changes:

+ Microarchitecture optimizations
+ 64-bit support
+ Xilinx FPGA support
+ LLVM-16 support
+ Refactoring and quality control fixes

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cache bindings and memory perf refactory

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hw unit tests fixes

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docs/codebase.md

@@ -3,38 +3,39 @@
 The directory/file layout of the Vortex codebase is as followed:
 
 - `hw`:     
-  - `rtl`: hardware rtl sources
-    - `cache`: cache subsystem code
-    - `fp_cores`: floating point unit code
+  - `rtl`: hardware rtl sources    
+    - `core`: core pipeline
+    - `cache`: cache subsystem
+    - `mem`: memory subsystem
+    - `fpu`: floating point unit
     - `interfaces`: interfaces for inter-module communication
-    - `libs`: general-purpose RTL modules
+    - `libs`: general-purpose RTL modules    
   - `syn`: synthesis directory
-    - `opae`: OPAE synthesis scripts
-    - `quartus`: Quartus synthesis scripts    
+    - `altera`: Altera synthesis scripts
+    - `xilinx`: Xilinx synthesis scripts    
     - `synopsys`: Synopsys synthesis scripts
     - `modelsim`: Modelsim synthesis scripts
     - `yosys`: Yosys synthesis scripts
   - `unit_tests`: unit tests for some hardware components
-- `driver`: host drivers repository
+- `runtime`: host runtime software APIs
   - `include`: Vortex driver public headers
   - `stub`: Vortex stub driver library
-  - `fpga`: software driver that uses Intel OPAE FPGA
-  - `asesim`: software driver that uses Intel ASE simulator
-  - `vlsim`: software driver that uses vlsim simulator
+  - `opae`: software driver that uses Intel OPAE API with device targets=fpga|asesim|opaesim
+  - `xrt`: software driver that uses Xilinx XRT API with device targets=hw|hw_emu|sw_emu
   - `rtlsim`: software driver that uses rtlsim simulator
   - `simx`: software driver that uses simX simulator
-- `runtime`: kernel runtime software
+- `kernel`: GPU kernel software APIs
   - `include`: Vortex runtime public headers
   - `linker`: linker file for compiling kernels
   - `src`: runtime implementation
 - `sim`: 
-  - `vlsim`: AFU RTL simulator
+  - `opaesim`: Intel OPAE AFU RTL simulator
   - `rtlsim`: processor RTL simulator
   - `simX`: cycle approximate simulator for vortex
 - `tests`: tests repository.
-  - `runtime`: runtime tests
-  - `regression`: regression tests
-  - `riscv`: RISC-V standard tests
+  - `riscv`: RISC-V conformance tests
+  - `kernel`: kernel tests
+  - `regression`: regression tests  
   - `opencl`: opencl benchmarks and tests
 - `ci`: continuous integration scripts
 - `miscs`: miscellaneous resources.