typedef struct {
  char *label, *code, *op1, *op2, *op3, *comment;
} CaslCode;

typedef struct {
  char *label, *str;
} StringTableEntry;

#define NOP "NOP"
#define LD "LD"
#define ST "ST"
#define LAD "LAD"
#define ADDA "ADDA"
#define SUBA "SUBA"
#define ADDL "ADDL"
#define SUBL "SUBL"
#define AND "AND"
#define OR "OR"
#define XOR "XOR"
#define CPA "CPA"
#define CPL "CPL"
#define SLA "SLA"
#define SRA "SRA"
#define SLL "SLL"
#define SRL "SRL"
#define JMI "JMI"
#define JNZ "JNZ"
#define JZE "JZE"
#define JUMP "JUMP"
#define JPL "JPL"
#define JOV "JOV"
#define PUSH "PUSH"
#define POP "POP"
#define CALL "CALL"
#define RET "RET"
#define SVC "SVC"

#define START "START"
#define END "END"
#define DS "DS"
#define DC "DC"
#define IN "IN"
#define OUT "OUT"
#define RPUSH "RPUSH"
#define RPOP "RPOP"
#define GR0 "GR0"
#define GR1 "GR1"
#define GR2 "GR2"
#define GR3 "GR3"
#define GR4 "GR4"
#define GR5 "GR5"
#define GR6 "GR6"
#define GR7 "GR7"