Some CPU boilerplate

README.md

@@ -15,11 +15,12 @@ uVM is simply an experiment in developing a working virtual machine with it's ow
 
 ## Usage
 
-`uvm [-v] [-h] -f <your_file_of_bytecode>.uc`
+`uvm [-v] [-h] [-d <stack_depth>] -f <your_file_of_bytecode>.uc`
 
 * `-v`: Enable verbose logging mode
 * `-h`: Show usage
 * `-f <file_name>.uc`: Load the uvm bytecode file for processing
+* `-d <stack_depth>`: The maximum stack depth in words
 
 ## Testing
 
@@ -53,6 +54,7 @@ uVM possesses the standard issue instruction set you might expect in a simple VM
 | isub         | 5      | Subtracts the top two _integer_ arguments of the stack from each other         |
 | jmp _LABEL_  | 6      | Unconditional jump to _label_                                                  |
 | jc _LABEL_   | 7      | Jump if the top of the stack is a 1                                            |
+| halt         | 8      | Halts the VM                                                                   |
 
 
 As I learn more about VM development this instruction set will likely become much more robust.
@@ -61,6 +63,8 @@ As I learn more about VM development this instruction set will likely become muc
 
 - [] Tests for good paths for all instructions
 - [] Tests for uncompilable code
+- [] Tests for maximum stack size reached
+- [] Tests to make sure the maximum stack depth is always greater than 0
 - [] Logging out current stack position, etc when verbose mode is enabled
 - [] If verbose mode isn't enabled it shows the ascii loading while processing
 - [] Come up with a way to allow the user to echo to the screen

include/cpu.h

@@ -0,0 +1,36 @@
+//   This file is part of UVM.
+//
+//   UVM is free software: you can redistribute it and/or modify
+//   it under the terms of the GNU General Public License as published by
+//   the Free Software Foundation, either version 3 of the License, or
+//   (at your option) any later version.
+//
+//   UVM is distributed in the hope that it will be useful,
+//   but WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//   GNU General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with UVM.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef CPU_H_
+#define CPU_H_
+
+class CPU {
+  private:
+    int sp; // Stack pointer
+    int ip; // Instruction pointer
+    int fp; // Frame pointer
+
+    // Stack goes here
+
+  public:
+    CPU();  // The CPU should be initialized with the code and stuff
+    fetch();
+    decode();
+    execute();
+    run();     // Runs the loaded code...this should have something in args
+};
+
+#endif  // CPU_H_

include/opcodes.h

@@ -13,7 +13,6 @@
 //   You should have received a copy of the GNU General Public License
 //   along with UVM.  If not, see <http://www.gnu.org/licenses/>.
 //
-//
 
 
 #ifndef OPCODES_H_

src/cpu.cc

@@ -13,13 +13,3 @@
 //   You should have received a copy of the GNU General Public License
 //   along with UVM.  If not, see <http://www.gnu.org/licenses/>.
 //
-//
-
-
-#ifndef DECODER_H_
-#define DECODER_H_
-
-
-
-
-#endif  // DECODER_H_