/*************************************************************/
/*  proj4.c

   This file consists of two parts.  
    a. data structures of code storage
    b. emit functions
*/

/**************** data structures *******************/

#define	DATA_LINE_MAX	500
	/* # of lines in data definition */
#define CODE_LINE_MAX	8000
	/* # of lines in code */
#define DATA_MAX	10000
	/* # of chars in data definition */
#define CODE_MAX	100000
	/* # of chars in code */

typedef struct 
{
  int mode;
	/* operand mode, see definitions below */
  int num_const;
	/* number constant or the offset in register displayment mode */
  char char_const;
	/* char constant */
  char *ident;
	/* identifier */
  int reg;
	/* register number */
} OPERAND;	

/* operand mode */
#define NUM_CONST	50
	/* operand is a number constant */
#define CHAR_CONST	60
	/* char constant */
#define IDENTIFIER	70
	/* operand is an identifier */
#define REGISTER	80
	/* operand is in a register */
#define REG_DEFER	90
	/* the address of operand is the content of a reg */
#define REG_DISPL	100
	/* the address of operand is the content of a reg + a number */

/* register definition */
#define R0	0
#define R1	1
#define R2	2
#define R3	3
#define R4	4
#define R5	5
#define R6	6
#define R7	7
#define R8	8
#define R9	9
#define R10	10
#define R11	11
#define AP	12
#define FP	13
#define SP	14
#define PC	15

/* instruction definition */

/* general group */
#define ADD	21
#define SUB	22
#define MUL	23
#define DIV	24
#define AND	25
#define OR	26
#define MOV	27
#define MOVA	28 
#define PUSH	29
#define PUSHA	30
#define CMP	31
#define TST	32

/* brach and jump group */
#define BEQL	40
#define BGEQ	41
#define BGTR	42
#define BLEQ	43
#define BLSS	44
#define BNEQ	45
#define JMP	46