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45 lines
915 B
45 lines
915 B
3 years ago
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#ifndef ALLOCATE_INCLUDED
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#define ALLOCATE_INCLUDED
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#define REGISTER_SIZE 4
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#define NUM_REGISTERS 8
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typedef enum{
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data_register,
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data_stack
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} data_entry_type;
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typedef struct reg_list reg_list;
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struct reg_list{
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unsigned int num_allocated;
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unsigned char registers[NUM_REGISTERS];
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unsigned char positions[NUM_REGISTERS];
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};
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typedef struct data_entry data_entry;
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struct data_entry{
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data_entry_type type;
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union{
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int reg;
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int stack_pos;
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};
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unsigned int prev_stack_size;
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};
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extern int stack_size;
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extern int variables_size;
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extern int saved_stack_size;
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extern reg_list register_list;
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void initialize_register_list();
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data_entry allocate(unsigned char force_stack);
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void deallocate(data_entry entry);
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int get_stack_pos(data_entry entry);
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reg_list push_registers(FILE *output_file);
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int get_reg_stack_pos(reg_list regs, unsigned char reg);
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void pull_registers(reg_list regs, FILE *output_file);
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#endif
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