git.squeep.com Git - dcpu16/blob - as-dcpu16.h

   1 #ifndef AS_DCPU16_H_PTFNJB09
   2 #define AS_DCPU16_H_PTFNJB09
   3
   4 #include "dcpu16.h"
   5
   6 struct instruction_ {
   7     char *label;  /* set if a label points here */
   8     char *opcode; /* tokenized instruction text */
   9     struct operand_ *operands;  /* list of operands */
  10     unsigned int length; /* words */
  11     unsigned int ready : 1; /* bytecode computed? */
  12     DCPU16_WORD instr_words[];
  13 };
  14
  15
  16 enum operand_types_{
  17     OT_DIRECT,  /* these operands simply render their contents into bytecode */
  18     OT_NEXT,    /* these operands increase instruction length */
  19     OT_LABEL    /* labels need to be computed then converted to other types */
  20 };
  21
  22 struct operand_ {
  23     struct operand_ *next;
  24     char *operand; /* tokenized operand text */
  25     enum operand_types_ type;
  26     union {
  27         DCPU16_WORD word_value;
  28         struct instruction_ *label_destination;
  29     } value;
  30 };
  31
  32
  33 #define IL_SIZE(entries) (((entries) * sizeof(struct instruction_ *)) + sizeof(struct instruction_list_))
  34
  35 struct instruction_list_ {
  36     size_t allocated;
  37     size_t entries;
  38     struct instruction_ *instr[];
  39 };
  40
  41
  42 /* note label table holds its own structs, not pointers */
  43 struct label_ {
  44     char *label; /* name of label */
  45     struct instruction_ *instr;
  46 };
  47
  48 #define LL_SIZE(entries) (((entries) * sizeof(struct label_ *)) + sizeof(struct label_list_))
  49
  50 struct label_list_ {
  51     size_t allocated;
  52     size_t entries;
  53     struct label_ label[];
  54 };
  55
  56 #endif /* AS_DCPU16_H_PTFNJB09 */