Architecture-Simulator

Concordia project for computer architecture class

Put the code you want to compile in code.mod7, and run the main.java file.

The ALU implements the following instructions, with the following behavior and limitations:

1. LDA reg1 reg2/var/const : Load register reg1 with the contents of either the contents of reg2, or the memory var or a constant const. Memory regions loads (load into a variable, for instance) are NOT ALLOWED.

2. STR var reg/const : Store in the memory position referred by var the value of register reg or a constant const. Register stores (store into register t0, for instance) are NOT ALLOWED.

3. PUSH reg/var/const : Push to the top of the stack the contents of reg or var or a constant const

4. POP reg : Pop from the top of the stack and store the value on reg. Storing in a memory region is NOT ALLOWED.

5. AND reg1 reg2/var/const : Performs a logical AND operation between reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

6. OR reg1 reg2/var/const : Performs a logical OR operation between reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

7. NOT reg : Performs a logical NOT operation on register reg and store the result on register reg. Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

8. ADD reg1 reg2/var/const : Performs the addition operation of reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

9. SUB reg1 reg2/var/const : Performs the subtraction operation of reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. The operation is given by second argument minus the first argument (i.e., reg2 – reg1). Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

10. DIV reg1 reg2/var/const : Performs the integer division operation of reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. The operation is given by second argument divided by the first argument (i.e., reg2 / reg1). Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

11. MUL reg1 reg2/var/const : Performs the integer multiplication operation of reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

12. MOD reg1 reg2/var/const : Performs the integer modulo operation of reg1 and a register reg2, a variable var or a constant const, and store the result on register reg1. The operation is given by second argument modulo the first argument (i.e., reg2 mod reg1). Memory regions stores (store result into a variable, for instance) are NOT ALLOWED.

13. INC reg : Increments the value of a register reg. Memory increments (incrementing a variable, for instance) are NOT ALLOWED.

14. DEC reg : Decrements the value of a register reg. Memory increments (decrementing a variable, for instance) are NOT ALLOWED.

15. BEQ reg1/var1/const1 reg2/var2/const2 LABEL : Performs a comparison between two values, given by registers, variables or constants. Any combination is permitted. If they are equal, jump to the address defined by the label LABEL

16. BNE reg1/var1/const1 reg2/var2/const2 LABEL : Performs a comparison between two values, given by registers, variables or constants. Any combination is permitted. If they are different, jump to the address defined by the label LABEL

17. BBG reg1/var1/const1 reg2/var2/const2 LABEL : Performs a comparison between two values, given by registers, variables or constants. Any combination is permitted. If the first parameter is bigger than the second parameter, jump to the address defined by the label LABEL

18. BSM reg1/var1/const1 reg2/var2/const2 LABEL : Performs a comparison between two values, given by registers, variables or constants. Any combination is permitted. If the first parameter is smaller than the second parameter, jump to the address defined by the label LABEL

19. JMP LABEL : Jump to the address defined by the label LABEL

20. HLT : End the program execution.