sdcc/src/pic14/pcodeflow.h

   1 /*-------------------------------------------------------------------------
   2
   3    pcode.h - post code generation
   4    Written By -  Scott Dattalo scott@dattalo.com
   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
  22 #ifndef __PCODEFLOW_H__
  23 #define __PCODEFLOW_H__
  24
  25 #include "pcode.h"
  26
  27 /*************************************************
  28  * pCode conditions:
  29  *
  30  * The "conditions" are bit-mapped flags that describe
  31  * input and/or output conditions that are affected by
  32  * the instructions. For example:
  33  *
  34  *    MOVF   SOME_REG,W
  35  *
  36  * This instruction depends upon 'SOME_REG'. Consequently
  37  * it has the input condition PCC_REGISTER set to true.
  38  *
  39  * In addition, this instruction affects the Z bit in the
  40  * status register and affects W. Thus the output conditions
  41  * are the logical or:
  42  *  PCC_ZERO_BIT | PCC_W
  43  *
  44  * The conditions are initialized when the pCode for an
  45  * instruction is created. They're subsequently used
  46  * by the pCode optimizer determine state information
  47  * in the program flow.
  48  *************************************************/
  49
  50 #define  PCC_NONE          0
  51 #define  PCC_REGISTER      (1<<0)
  52 #define  PCC_C             (1<<1)
  53 #define  PCC_Z             (1<<2)
  54 #define  PCC_DC            (1<<3)
  55 #define  PCC_W             (1<<4)
  56 #define  PCC_EXAMINE_PCOP  (1<<5)
  57 #define  PCC_REG_BANK0     (1<<6)
  58 #define  PCC_REG_BANK1     (1<<7)
  59 #define  PCC_REG_BANK2     (1<<8)
  60 #define  PCC_REG_BANK3     (1<<9)
  61 #define  PCC_LITERAL       (1<<10)
  62
  63 /*------------------------------------------------------------*/
  64
  65 void BuildFlowTree(pBlock *pb);
  66
  67 #endif // __PCODEFLOW_H__
  68