SDCCralloc.h - header file register allocation
Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
- PIC port - T. Scott Dattalo scott@dattalo.com (2000)
+ PIC port - T. Scott Dattalo scott@dattalo.com (2000)
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
#ifndef SDCCRALLOC_H
#define SDCCRALLOC_H 1
+#include "pcoderegs.h"
enum
- {
- R2_IDX = 0, R3_IDX, R4_IDX,
- R5_IDX, R6_IDX, R7_IDX,
- R0_IDX, R1_IDX, X8_IDX,
- X9_IDX, X10_IDX, X11_IDX,
- X12_IDX, CND_IDX
- };
+{
+ R2_IDX = 0, R3_IDX, R4_IDX,
+ R5_IDX, R6_IDX, R7_IDX,
+ R0_IDX, R1_IDX, X8_IDX,
+ X9_IDX, X10_IDX, X11_IDX,
+ X12_IDX, CND_IDX
+};
-
-#define REG_PTR 0x01
-#define REG_GPR 0x02
-#define REG_CND 0x04
-#define REG_SFR 0x08
+enum {
+ REG_PTR=1,
+ REG_GPR,
+ REG_CND,
+ REG_SFR,
+ REG_STK,
+ REG_TMP
+};
+//#define REG_PTR 0x01
+//#define REG_GPR 0x02
+//#define REG_CND 0x04
+//#define REG_SFR 0x08
+//#define REG_STK 0x10 /* Use a register as a psuedo stack */
+//#define REG_TMP 0x20
/* definition for the registers */
typedef struct regs
- {
- short type; /* can have value
- * REG_GPR, REG_PTR or REG_CND
- * This like the "meta-type" */
- short pc_type; /* pcode type */
- short rIdx; /* index into register table */
- // short otype;
- char *name; /* name */
- char *dname; /* name when direct access needed */
- // char *base ; /* base address */
- short offset; /* offset from the base */
- unsigned isFree:1; /* is currently unassigned */
- unsigned wasUsed:1; /* becomes true if register has been used */
- }
+{
+ short type; /* can have value
+ * REG_GPR, REG_PTR or REG_CND
+ * This like the "meta-type" */
+ short pc_type; /* pcode type */
+ short rIdx; /* index into register table */
+ char *name; /* name */
+
+ unsigned isFree:1; /* is currently unassigned */
+ unsigned wasUsed:1; /* becomes true if register has been used */
+ unsigned isFixed:1; /* True if address can't change */
+ unsigned isMapped:1; /* The Register's address has been mapped to physical RAM */
+ unsigned isBitField:1; /* True if reg is type bit OR is holder for several bits */
+ unsigned isEmitted:1; /* True if the reg has been written to a .asm file */
+ unsigned isPublic:1; /* True if the reg is not static and can be modified in another module (ie a another c or asm file) */
+ unsigned isExtern:1; /* True if the reg is in another module */
+ unsigned address; /* reg's address if isFixed | isMapped is true */
+ unsigned size; /* 0 for byte, 1 for int, 4 for long */
+ unsigned alias; /* Alias mask if register appears in multiple banks */
+ struct regs *reg_alias; /* If more than one register share the same address
+ * then they'll point to each other. (primarily for bits)*/
+ pCodeRegLives reglives; /* live range mapping */
+}
regs;
extern regs regspic14[];
extern int pic14_nRegs;
+extern int Gstack_base_addr;
+
+/*
+ As registers are created, they're added to a set (based on the
+ register type). Here are the sets of registers that are supported
+ in the PIC port:
+*/
+extern set *dynAllocRegs;
+extern set *dynStackRegs;
+extern set *dynProcessorRegs;
+extern set *dynDirectRegs;
+extern set *dynDirectBitRegs;
+extern set *dynInternalRegs;
+
regs *pic14_regWithIdx (int);
+regs *dirregWithName (char *name );
void pic14_freeAllRegs ();
void pic14_deallocateAllRegs ();
-regs *pic14_findFreeReg(void);
-
-enum PIC_register_types
- {
- PIC_INDF,
- PIC_TMR0,
- PIC_FSR,
- PIC_STATUS,
- PIC_IOPORT,
- PIC_IOTRIS,
- PIC_GPR, /* A general purpose file register */
- PIC_SFR /* A special function register */
- };
+regs *pic14_findFreeReg(short type);
+regs *pic14_allocWithIdx (int idx);
+regs *typeRegWithIdx (int idx, int type, int fixed);
+regs *regFindWithName (const char *name);
+
+regs *allocDirReg (operand *op );
+regs *allocRegByName (char *name, int size );
+regs *allocNewDirReg (sym_link *symlnk,const char *name);
+
+/* Define register address that are constant across PIC family */
+#define IDX_INDF 0
+#define IDX_TMR0 1
+#define IDX_PCL 2
+#define IDX_STATUS 3
+#define IDX_FSR 4
+#define IDX_PORTA 5
+#define IDX_PORTB 6
+#define IDX_PCLATH 0x0a
+#define IDX_INTCON 0x0b
+#define IDX_KZ 0x7fff /* Known zero - actually just a general purpose reg. */
+#define IDX_WSAVE 0x7ffe
+#define IDX_SSAVE 0x7ffd
+#define IDX_PSAVE 0x7ffc
#endif
projects / fw / sdcc / blobdiff