1 /*------------------------------------------------------------------------- 2 3 pcode.h - post code generation 4 5 Written By - Scott Dattalo scott@dattalo.com 6 PIC16 port - Martin Dubuc m.dubuc@rogers.com 7 8 This program is free software; you can redistribute it and/or modify it 9 under the terms of the GNU General Public License as published by the 10 Free Software Foundation; either version 2, or (at your option) any 11 later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21 22 -------------------------------------------------------------------------*/ 23 24 #ifndef __PCODEFLOW_H__ 25 #define __PCODEFLOW_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 intialized 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_REGISTER2 (1<<1) 53 #define PCC_C (1<<2) 54 #define PCC_Z (1<<3) 55 #define PCC_DC (1<<4) 56 #define PCC_OV (1<<5) 57 #define PCC_N (1<<6) 58 #define PCC_W (1<<7) 59 #define PCC_EXAMINE_PCOP (1<<8) 60 #define PCC_LITERAL (1<<9) 61 #define PCC_REL_ADDR (1<<10) 62 63 #define PCC_STATUS (PCC_C | PCC_Z | PCC_DC | PCC_OV | PCC_N) 64 65 /*------------------------------------------------------------*/ 66 67 void BuildFlowAncestry(pBlock *pb); 68 69 #endif // __PCODEFLOW_H__ 70