82 lines
1.4 KiB
C
82 lines
1.4 KiB
C
#pragma once
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#include <common.h>
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#include <instructions.h>
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typedef struct {
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u8 a;
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u8 f;
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u8 b;
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u8 c;
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u8 d;
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u8 e;
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u8 h;
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u8 l;
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u16 pc;
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u16 sp;
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} cpu_registers;
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typedef struct {
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cpu_registers regs;
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//current fetch...
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u16 fetched_data;
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u16 mem_dest;
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bool dest_is_mem;
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u8 cur_opcode;
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instruction *cur_inst;
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bool halted;
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bool stepping;
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bool int_master_enabled;
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bool enabling_ime;
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u8 ie_register;
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u8 int_flags;
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u16 inst_pc;
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} cpu_context;
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typedef struct {
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cpu_context ctx;
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} cpu_state;
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void cpu_save_state(cpu_state*);
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void cpu_load_state(const cpu_state*);
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void fetch_instruction(cpu_context *ctx);
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void cpu_init();
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bool cpu_step();
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typedef void (*IN_PROC)(cpu_context *);
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IN_PROC inst_get_processor(in_type type);
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#define CPU_FLAG_Z BIT(ctx->regs.f, 7)
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#define CPU_FLAG_N BIT(ctx->regs.f, 6)
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#define CPU_FLAG_H BIT(ctx->regs.f, 5)
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#define CPU_FLAG_C BIT(ctx->regs.f, 4)
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cpu_context *cpu_get_context();
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u16 cpu_read_reg(reg_type rt);
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void cpu_set_reg(reg_type rt, u16 val);
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u8 cpu_read_reg8(reg_type rt);
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void cpu_set_reg8(reg_type rt, u8 val);
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void fetch_data();
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u8 cpu_get_ie_register();
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void cpu_set_ie_register(u8 ie);
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cpu_registers *cpu_get_regs();
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u8 cpu_get_int_flags();
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void cpu_set_int_flags(u8 value);
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void inst_to_str(cpu_context *ctx, char *str);
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void cpu_set_flags(cpu_context *ctx, int8_t z, int8_t n, int8_t h, int8_t c); |