1 /*-------------------------------------------------------------------------
3 SDCCralloc.h - header file register allocation
5 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
6 PIC port - T. Scott Dattalo scott@dattalo.com (2000)
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
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.
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.
22 In other words, you are welcome to use, share and improve this program.
23 You are forbidden to forbid anyone else to use, share and improve
24 what you give them. Help stamp out software-hoarding!
25 -------------------------------------------------------------------------*/
26 #include "SDCCicode.h"
27 #include "SDCCBBlock.h"
29 #define SDCCRALLOC_H 1
31 #include "pcoderegs.h"
36 R2_IDX = 0, R3_IDX, R4_IDX,
37 R5_IDX, R6_IDX, R7_IDX,
38 R0_IDX, R1_IDX, X8_IDX,
39 X9_IDX, X10_IDX, X11_IDX,
51 //#define REG_PTR 0x01
52 //#define REG_GPR 0x02
53 //#define REG_CND 0x04
54 //#define REG_SFR 0x08
55 //#define REG_STK 0x10 /* Use a register as a psuedo stack */
56 //#define REG_TMP 0x20
58 /* definition for the registers */
61 short type; /* can have value
62 * REG_GPR, REG_PTR or REG_CND
63 * This like the "meta-type" */
64 short pc_type; /* pcode type */
65 short rIdx; /* index into register table */
67 char *name; /* name */
69 unsigned isFree:1; /* is currently unassigned */
70 unsigned wasUsed:1; /* becomes true if register has been used */
71 unsigned isFixed:1; /* True if address can't change */
72 unsigned isMapped:1; /* The Register's address has been mapped to physical RAM */
73 unsigned isBitField:1; /* True if reg is type bit OR is holder for several bits */
74 unsigned isEmitted:1; /* True if the reg has been written to a .asm file */
75 unsigned isPublic:1; /* True if the reg is not static and can be modified in another module (ie a another c or asm file) */
76 unsigned isExtern:1; /* True if the reg is in another module */
77 unsigned address; /* reg's address if isFixed | isMapped is true */
78 unsigned size; /* 0 for byte, 1 for int, 4 for long */
79 unsigned alias; /* Alias mask if register appears in multiple banks */
80 struct regs *reg_alias; /* If more than one register share the same address
81 * then they'll point to each other. (primarily for bits)*/
82 pCodeRegLives reglives; /* live range mapping */
85 extern regs regspic14[];
86 extern int pic14_nRegs;
87 extern int Gstack_base_addr;
90 As registers are created, they're added to a set (based on the
91 register type). Here are the sets of registers that are supported
94 extern set *dynAllocRegs;
95 extern set *dynStackRegs;
96 extern set *dynProcessorRegs;
97 extern set *dynDirectRegs;
98 extern set *dynDirectBitRegs;
99 extern set *dynInternalRegs;
102 regs *pic14_regWithIdx (int);
103 regs *dirregWithName (char *name );
104 void pic14_freeAllRegs ();
105 void pic14_deallocateAllRegs ();
106 regs *pic14_findFreeReg(short type);
107 regs *pic14_allocWithIdx (int idx);
108 regs *typeRegWithIdx (int idx, int type, int fixed);
109 regs *regFindWithName (const char *name);
111 regs *allocDirReg (operand *op );
112 regs *allocRegByName (char *name, int size );
113 regs *allocNewDirReg (sym_link *symlnk,const char *name);
115 /* Define register address that are constant across PIC family */
123 #define IDX_PCLATH 0x0a
124 #define IDX_INTCON 0x0b
126 #define IDX_KZ 0x7fff /* Known zero - actually just a general purpose reg. */
127 #define IDX_WSAVE 0x7ffe
128 #define IDX_SSAVE 0x7ffd
129 #define IDX_PSAVE 0x7ffc