njvm.h

/*--- njvm.h ---*/


/* begin instructions */
#define HALT 0
#define PUSHC 1 /*pushc <n>*/
#define ADD 2 
#define SUB 3
#define MUL 4
#define DIV 5
#define MOD 6

#define RDINT 7
#define WRINT 8

#define ASF 9    /*asf <n>*/
#define RSF 10
#define PUSHL 11 /*pushl <n>, wert von frame in stack*/
#define POPL 12  /*popl <n>, wert von stack in frame*/

#define EQ 13  /* == */
#define NE 14  /* != */
#define LT 15  /* <  */
#define LE 16  /* <= */
#define GT 17  /* >  */
#define GE 18  /* >= */

#define JMP 19 /* jmp <target> */
#define BRF 20 /* brf <target> */
#define BRT 21 /* brt <target> */

#define CALL 22   /* call <target> */
#define RET 23
#define DROP 24   /* drop  <n> */
#define PUSHR 25
#define POPR 26

#define DUP 27

#define NEW 28  /* new <n> */
#define GETF 29 /* getf <n> */
#define PUTF 30 /* putf <n> */

#define NEWA 31
#define GETLA 32
#define GETFA 33
#define PUTFA 34

#define PUSHN 35
#define REFEQ 36
#define REFNE 37

#define VMCALL 38 /* vmcall <n>,<m> */
/* end instructions */


/* begin makros */
#define IMMEDIATE(x) ((x) & 0x00FFFFFF)
#define NUMBER_OF_ARGS(y) (((y) & 0x00FF0000) >> 16)
#define INDEX(z) ((z) & 0x0000FFFF)
#define SIGN_EXTEND(i) ((i) & 0x00800000 ? (i) | 0xFF000000 : (i))

#define MSB (1<<(8*sizeof(unsigned int)-1))
#define COUNT_IS_BYTES(size) (((size)&MSB)!=0)
#define COUNT_IS_OBJREFS(size) (((size)&MSB)==0)
#define COUNT_FROM_SIZE(size) ((size)& ~MSB)

#define OBJ_HAS_BYTES(objref) COUNT_IS_BYTES((objref)->size)
#define OBJ_HAS_OBJREF(objref) COUNT_IS_OBJREFS((objref)->size)
#define COUNT_FROM_OBJREF(objref) COUNT_FROM_SIZE((objref)->size)
/* end makros */


/* size of the Stack */
#define stackSize 1024


/* Objekt declaration */
typedef union{
  struct object *field[1];
  unsigned char byte[1];
}Data;

typedef struct object{
  unsigned int vmt;
  unsigned int size;
  Data data;
}Object;

typedef Object *ObjRef;

typedef struct{
  bool isNumber;
  union{
    ObjRef objRef;
    int number;
  }u;
}StackItem;


/* funktionen */
void printHelp(void);
void program(unsigned int *code);
void printProgram(unsigned int *code);
void push(int num, bool isNumber);
int pop(void);
Object *popObject(void);
void pushFrame(Object *object, int point);
Object *popFrame(int point);
int compare(int n1, int n2, int instruction);
void openFile(int i, int argc, char *argv[]);
void closeFile(void);
void debug(void);
Object *newStackVal(bool isObject, int size);
int getStackVal(int i);
char *getTypeOfVariable(int j);
void *getHeapAddress(int i);
Object *getf(int index);
void putf(int index, Object *objValue, Object *objRef);
void nullStackFrame(int frameP, int stackP);
void error(char *errMsg);