1 /*-------------------------------------------------------------------------
3 ralloc.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)
7 PIC16 port - Martin Dubuc m.dubuc@rogers.com (2002)
9 This program is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 In other words, you are welcome to use, share and improve this program.
24 You are forbidden to forbid anyone else to use, share and improve
25 what you give them. Help stamp out software-hoarding!
26 -------------------------------------------------------------------------*/
27 #include "SDCCicode.h"
28 #include "SDCCBBlock.h"
30 #define SDCCRALLOC_H 1
32 #include "pcoderegs.h"
34 extern unsigned int stackPos;
35 extern unsigned int stackLen;
39 R2_IDX = 0, R3_IDX, R4_IDX,
40 R5_IDX, R6_IDX, R7_IDX,
41 R0_IDX, R1_IDX, X8_IDX,
42 X9_IDX, X10_IDX, X11_IDX,
54 //#define REG_PTR 0x01
55 //#define REG_GPR 0x02
56 //#define REG_CND 0x04
57 //#define REG_SFR 0x08
58 //#define REG_STK 0x10 /* Use a register as a psuedo stack */
59 //#define REG_TMP 0x20
61 /* definition for the registers */
64 short type; /* can have value
65 * REG_GPR, REG_PTR or REG_CND
66 * This like the "meta-type" */
67 short pc_type; /* pcode type */
68 short rIdx; /* index into register table */
70 char *name; /* name */
72 unsigned isFree:1; /* is currently unassigned */
73 unsigned wasUsed:1; /* becomes true if register has been used */
74 unsigned isFixed:1; /* True if address can't change */
75 // unsigned isMapped:1; /* The Register's address has been mapped to physical RAM */
76 unsigned isBitField:1; /* True if reg is type bit OR is holder for several bits */
77 unsigned isEmitted:1; /* True if the reg has been written to a .asm file */
78 unsigned accessBank:1; /* True if the reg is explicit placed in access bank */
79 unsigned isLocal:1; /* True if the reg is allocated in function's local frame */
80 unsigned address; /* reg's address if isFixed | isMapped is true */
81 unsigned size; /* 0 for byte, 1 for int, 4 for long */
82 unsigned alias; /* Alias mask if register appears in multiple banks */
83 struct regs *reg_alias; /* If more than one register share the same address
84 * then they'll point to each other. (primarily for bits)*/
85 operand *regop; /* reference to the operand used to create the register */
86 pCodeRegLives reglives; /* live range mapping */
89 extern regs regspic16[];
90 extern int pic16_nRegs;
91 extern int pic16_Gstack_base_addr;
94 As registers are created, they're added to a set (based on the
95 register type). Here are the sets of registers that are supported
98 extern set *pic16_dynAllocRegs;
99 extern set *pic16_dynStackRegs;
100 extern set *pic16_dynProcessorRegs;
101 extern set *pic16_dynDirectRegs;
102 extern set *pic16_dynDirectBitRegs;
103 extern set *pic16_dynInternalRegs;
105 extern set *pic16_builtin_functions;
107 extern set *pic16_rel_udata;
108 extern set *pic16_fix_udata;
109 extern set *pic16_equ_data;
110 extern set *pic16_int_regs;
111 extern set *pic16_acs_udata;
113 regs *pic16_regWithIdx (int);
114 regs *pic16_typeRegWithIdx(int, int, int);
115 regs *pic16_dirregWithName (char *name );
116 regs *pic16_allocregWithName(char *name);
117 regs *pic16_regWithName(char *name);
118 void pic16_freeAllRegs ();
119 void pic16_deallocateAllRegs ();
120 regs *pic16_findFreeReg(short type);
121 regs *pic16_findFreeRegNext(short type, regs *creg);
122 regs *pic16_allocWithIdx (int idx);
124 regs *pic16_allocDirReg (operand *op );
125 regs *pic16_allocRegByName (char *name, int size, operand *op);
126 extern char *pic16_decodeOp(unsigned int op);
128 regs* newReg(short type, short pc_type, int rIdx, char *name, int size, int alias, operand *refop);
130 /* Define register address that are constant across PIC16 family */
131 #define IDX_TMR0 0xfd6
132 #define IDX_STATUS 0xfd8
133 #define IDX_INTCON 0xff2
134 #define IDX_WREG 0xfe8
135 #define IDX_BSR 0xfe0
137 #define IDX_PCL 0xff9
138 #define IDX_PCLATH 0xffa
139 #define IDX_PCLATU 0xffb
141 #define IDX_TOSL 0xffd
142 #define IDX_TOSH 0xffe
143 #define IDX_TOSU 0xfff
145 #define IDX_TBLPTRL 0xff6
146 #define IDX_TBLPTRH 0xff7
147 #define IDX_TBLPTRU 0xff8
148 #define IDX_TABLAT 0xff5
150 #define IDX_FSR0 0xfe9
151 #define IDX_FSR0L 0xfe9
152 #define IDX_FSR0H 0xfea
154 #define IDX_FSR1 0xfe1
155 #define IDX_FSR1L 0xfe1
156 #define IDX_FSR1H 0xfe2
158 #define IDX_FSR2 0xfd9
159 #define IDX_FSR2L 0xfd9
160 #define IDX_FSR2H 0xfda
162 #define IDX_INDF0 0xfef
163 #define IDX_POSTINC0 0xfee
164 #define IDX_POSTDEC0 0xfed
165 #define IDX_PREINC0 0xfec
166 #define IDX_PLUSW0 0xfeb
168 #define IDX_INDF1 0xfe7
169 #define IDX_POSTINC1 0xfe6
170 #define IDX_POSTDEC1 0xfe5
171 #define IDX_PREINC1 0xfe4
172 #define IDX_PLUSW1 0xfe3
174 #define IDX_INDF2 0xfdf
175 #define IDX_POSTINC2 0xfde
176 #define IDX_POSTDEC2 0xfdd
177 #define IDX_PREINC2 0xfdc
178 #define IDX_PLUSW2 0xfdb
180 #define IDX_PRODL 0xff3
181 #define IDX_PRODH 0xff4
183 /* EEPROM registers */
184 #define IDX_EECON1 0xfa6
185 #define IDX_EECON2 0xfa7
186 #define IDX_EEDATA 0xfa8
187 #define IDX_EEADR 0xfa9
189 #define IDX_KZ 0x7fff /* Known zero - actually just a general purpose reg. */
190 #define IDX_WSAVE 0x7ffe
191 #define IDX_SSAVE 0x7ffd
193 #define IDX_GPSIMIO 0xf7f
194 #define IDX_GPSIMIO2 0xf7e