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 /* set STACK_SUPPORT to 1 to compile code for stack */
35 #define STACK_SUPPORT 1
36 extern unsigned int stackPos;
40 R2_IDX = 0, R3_IDX, R4_IDX,
41 R5_IDX, R6_IDX, R7_IDX,
42 R0_IDX, R1_IDX, X8_IDX,
43 X9_IDX, X10_IDX, X11_IDX,
55 //#define REG_PTR 0x01
56 //#define REG_GPR 0x02
57 //#define REG_CND 0x04
58 //#define REG_SFR 0x08
59 //#define REG_STK 0x10 /* Use a register as a psuedo stack */
60 //#define REG_TMP 0x20
62 /* definition for the registers */
65 short type; /* can have value
66 * REG_GPR, REG_PTR or REG_CND
67 * This like the "meta-type" */
68 short pc_type; /* pcode type */
69 short rIdx; /* index into register table */
71 char *name; /* name */
73 unsigned isFree:1; /* is currently unassigned */
74 unsigned wasUsed:1; /* becomes true if register has been used */
75 unsigned isFixed:1; /* True if address can't change */
76 // unsigned isMapped:1; /* The Register's address has been mapped to physical RAM */
77 unsigned isBitField:1; /* True if reg is type bit OR is holder for several bits */
78 unsigned isEmitted:1; /* True if the reg has been written to a .asm file */
79 unsigned accessBank:1; /* True if the reg is explicit placed in access bank */
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_rel_udata;
106 extern set *pic16_fix_udata;
108 regs *pic16_regWithIdx (int);
109 regs *pic16_dirregWithName (char *name );
110 void pic16_freeAllRegs ();
111 void pic16_deallocateAllRegs ();
112 regs *pic16_findFreeReg(short type);
113 regs *pic16_allocWithIdx (int idx);
115 regs *pic16_allocDirReg (operand *op );
116 regs *pic16_allocRegByName (char *name, int size );
118 /* Define register address that are constant across PIC16 family */
119 #define IDX_INDF0 0xfef
120 #define IDX_TMR0 0xfd6
121 #define IDX_PCL 0xff9
122 #define IDX_STATUS 0xfd8
123 #define IDX_FSR0 0xfe9
124 #define IDX_PORTA 0xf80
125 #define IDX_PORTB 0xf81
126 #define IDX_PCLATH 0xffa
127 #define IDX_INTCON 0xff2
128 #define IDX_WREG 0xfe8
130 #define IDX_FSR1L 0xfe1
131 #define IDX_FSR1H 0xfe2
132 #define IDX_FSR2L 0xfd9
133 #define IDX_FSR2H 0xfda
134 #define IDX_POSTINC1 0xfe6
135 #define IDX_POSTDEC1 0xfe5
136 #define IDX_PREINC2 0xfdc
137 #define IDX_PLUSW2 0xfdb
139 #define IDX_KZ 0x7fff /* Known zero - actually just a general purpose reg. */
140 #define IDX_WSAVE 0x7ffe
141 #define IDX_SSAVE 0x7ffd