sdcc/src/mos6502/gen.h

   1 /*-------------------------------------------------------------------------
   2   gen.h - header file for code generation for mos6502
   3
   4              Written By -  Sandeep Dutta . sandeep.dutta@usa.net (1998)
   5
   6    This program is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by the
   8    Free Software Foundation; either version 2, or (at your option) any
   9    later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 -------------------------------------------------------------------------*/
  20
  21 #ifndef SDCCGENM6502_H
  22 #define SDCCGENM6502_H
  23
  24 typedef enum
  25   {
  26   AOP_INVALID,
  27   AOP_LIT = 1,   /* operand is a literal value */
  28   AOP_REG,       /* is in registers */
  29   AOP_DIR,       /* operand using direct addressing mode */
  30   AOP_STK,       /* should be pushed on stack this
  31                     can happen only for the result */
  32   AOP_IMMD,      /* immediate value for eg. remateriazable */
  33   AOP_STR,       /* array of strings */
  34   AOP_CRY,       /* carry contains the value of this */
  35   AOP_EXT,       /* operand using extended addressing mode */
  36   AOP_SOF,       /* operand at an offset on the stack */
  37   AOP_DUMMY,     /* Read undefined, discard writes */
  38   AOP_IDX        /* operand using indexed addressing mode */
  39 }
  40 AOP_TYPE;
  41
  42 /* asmop: A homogenised type for all the different
  43    spaces an operand can be in */
  44 typedef struct asmop
  45   {
  46     AOP_TYPE type;
  47     short coff;                 /* current offset */
  48     short size;                 /* total size */
  49     short regmask;              /* register mask if AOP_REG */
  50     operand *op;                /* originating operand */
  51     unsigned freed:1;           /* already freed    */
  52     unsigned stacked:1;         /* partial results stored on stack */
  53     struct asmop *stk_aop[4];   /* asmops for the results on the stack */
  54     union
  55       {
  56         value *aop_lit;         /* if literal */
  57         reg_info *aop_reg[4];   /* array of registers */
  58         char *aop_dir;          /* if direct  */
  59         char *aop_immd;         /* if immediate */
  60         int aop_stk;            /* stack offset when AOP_STK */
  61     } aopu;
  62   }
  63 asmop;
  64
  65 void genm6502Code (iCode *);
  66 void m6502_emitDebuggerSymbol (const char *);
  67
  68 extern unsigned fReturnSizeM6502;
  69
  70 extern bool m6502_assignment_optimal;
  71
  72 #endif
  73