sdcc/src/hc08/ralloc.h

   1 /*-------------------------------------------------------------------------
   2
   3   SDCCralloc.h - header file register allocation
   4
   5                 Written By -  Sandeep Dutta . sandeep.dutta@usa.net (1998)
   6
   7    This program is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by the
   9    Free Software Foundation; either version 2, or (at your option) any
  10    later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20
  21    In other words, you are welcome to use, share and improve this program.
  22    You are forbidden to forbid anyone else to use, share and improve
  23    what you give them.   Help stamp out software-hoarding!
  24 -------------------------------------------------------------------------*/
  25 #include "SDCCicode.h"
  26 #include "SDCCBBlock.h"
  27 #ifndef SDCCRALLOC_H
  28 #define SDCCRALLOC_H 1
  29
  30 enum
  31   {
  32     A_IDX,
  33     X_IDX,
  34     H_IDX,
  35     HX_IDX,
  36     XA_IDX,
  37     CND_IDX,
  38     SP_IDX
  39   };
  40
  41
  42 #define REG_PTR 0x01
  43 #define REG_GPR 0x02
  44 #define REG_CND 0x04
  45
  46 /* Must preserve the relation HC08MASK_H > HC08MASK_X > MC08MASK_A  */
  47 /* so that HC08MASK_REV can be automatically applied when reversing */
  48 /* the usual register pair ordering. */
  49 #define HC08MASK_A 0x01
  50 #define HC08MASK_X 0x02
  51 #define HC08MASK_H 0x04
  52 #define HC08MASK_REV 0x08
  53 #define HC08MASK_XA (HC08MASK_X | HC08MASK_A)
  54 #define HC08MASK_HX (HC08MASK_H | HC08MASK_X)
  55 #define HC08MASK_AX (HC08MASK_REV | HC08MASK_X | HC08MASK_A)
  56
  57 /* definition for the registers */
  58 typedef struct reg_info
  59   {
  60     short type;                 /* can have value
  61                                    REG_GPR, REG_PTR or REG_CND */
  62     short rIdx;                 /* index into register table */
  63     char *name;                 /* name */
  64     short mask;                 /* bitmask for pair allocation */
  65     struct asmop *aop;          /* last operand */
  66     int aopofs;                 /* last operand offset */
  67     unsigned isFree:1;          /* is currently unassigned */
  68     unsigned isDead:1;      /* does not need to survive current instruction */
  69     unsigned isLitConst:1;      /* has an literal constant loaded */
  70     int litConst;               /* last literal constant */
  71   }
  72 reg_info;
  73 extern reg_info regshc08[];
  74 extern reg_info *hc08_reg_a;
  75 extern reg_info *hc08_reg_x;
  76 extern reg_info *hc08_reg_h;
  77 extern reg_info *hc08_reg_hx;
  78 extern reg_info *hc08_reg_xa;
  79 extern reg_info *hc08_reg_sp;
  80
  81 reg_info *hc08_regWithIdx (int);
  82 void hc08_useReg (reg_info * reg);
  83 void hc08_freeReg (reg_info * reg);
  84 void hc08_dirtyReg (reg_info * reg, bool freereg);
  85 bitVect *hc08_rUmaskForOp (operand * op);
  86
  87 iCode *hc08_ralloc2_cc(ebbIndex *ebbi);
  88
  89 #endif