#ifndef COMPILER_REGISTERS_H
#define COMPILER_REGISTERS_H

#include "compiler/common.h"

enum {
    RegisterMax = 32
};
const char RegClass_SPR = 0;
const char RegClass_CRFIELD = 1;
const char RegClass_VR = 2;
const char RegClass_FPR = 3;
const char RegClass_GPR = 4;
const char RegClassMax = 5;
const char RegClass_6 = 6;
const char RegClass_DCR = 7;

enum {
    RegState0 = 0,
    RegState1 = 1,
    RegState2 = 2
};

extern int used_virtual_registers[RegClassMax];
extern int used_nonvolatile_registers[RegClassMax];
extern int assignable_registers[RegClassMax];
extern int n_real_registers[RegClassMax];
extern int n_scratch_registers[RegClassMax];
extern int scratch_registers[RegClassMax][RegisterMax];
extern int n_nonvolatile_registers[RegClassMax];
extern int nonvolatile_registers[RegClassMax][RegisterMax];
extern UInt8 reg_state[RegClassMax][RegisterMax];
extern int first_temporary_register[RegClassMax];
extern int last_temporary_register[RegClassMax];
extern char *register_class_name[RegClassMax];
extern char *register_class_format[RegClassMax];
extern int coloring;
extern int optimizing;

extern void init_registers(void);
extern void assign_register_to_variable(Object *obj, char rclass);
extern void retain_register_for_argument(Object *obj, char rclass, short reg);
extern int available_registers(char rclass);
extern UInt32 volatile_registers(char rclass);
extern short obtain_nonvolatile_register(char rclass);
extern void open_temp_registers(void);
extern void check_temp_registers(void);
extern void close_temp_registers(void);
extern int count_scratch_registers(void);
extern void init_modified_registers(void);
extern void note_modified_registers(Object *obj);
extern void find_modified_registers(Object *obj, UInt32 *masks);

#endif