instructions.h

/*
 * instructions.h
 *
 * @author Dr. Fenwick and ________
 * @version Spring 2014
 */

#ifndef INSTRUCTIONS_H_
#define INSTRUCTIONS_H_

//used in instruction.c and main
#define OPCODE_SIZE 6 
#define OPERAND_SIZE 21

// "public" functions used by others (e.g., main)
int hasOperand(char * opcode);
void insertInstruction(int address, char * opcode, char * operand);
int fetchInstruction(int address, char * opcode, char * operand);
void initialize();
void printSymbolTable();
void printInstructionTable();

// interpreter prototypes.
int nop(int);
int add(int);
int sub(int);
int mul(int);
//Evidently there is already a "div" function in the standard library.
int divide(int); 
int get(int, char * operand);
int put(int, char * operand);
int push(int, char * operand);
int pop(int, char * operand);
int not(int);
int and(int);
int or(int);
int testeq(int);
int testne(int);
int testlt(int);
int testle(int);
int testgt(int);
int testge(int);
int jump(int, char * operand);
int jf(int, char * operand);
int halt(int);

// The opcodes are assigned a number for easy switch statement
#define NOP 	 0
#define ADD 	 1
#define SUB 	 2
#define MUL 	 3
#define DIVIDE 4
#define GET 	 5
#define PUT 	 6
#define PUSH 	 7
#define POP 	 8
#define NOT  	 9
#define AND 	 10
#define OR 		 11
#define TESTEQ 12
#define TESTNE 13
#define TESTLT 14
#define TESTLE 15
#define TESTGT 16
#define TESTGE 17
#define JUMP 	 18
#define JF 		 19
#define HALT 	 20

#endif /* INSTRUCTIONS_H_ */