First/cpu.h

#ifndef CPU_HEADER
#include "simdata.h"

struct fetch_data_t{
	uint8_t wait_for_exec;
	uint8_t exec_done;
	uint8_t decode_done;
	int fetch_wait;
};

struct decode_data_t{
	uint32_t in_bytecode;
	uint32_t address; // used only for the gui hints (for now)
	uint8_t valid;
	uint8_t exec_done;
};




///// EXEC DATA STRUCTURES ///////
enum EXEC_ACTION_t {
	EXEC_ALU,
	MOVE,
	JUMP,
	CALL,
	NOP,
	HALT,
	RET,
	PUSH,
	POP
};

enum ALU_OP_t {
	ALU_ADD,
	ALU_SUB,
	ALU_SL,
	ALU_SR,
	ALU_CMP,
	ALU_FDIV,
	ALU_FMUL,
	ALU_FADD,
	ALU_FSUB,
	ALU_FSIN,
	ALU_FCOS,
	ALU_DEC,
	ALU_INC
};

enum OP_ADDR_t {
	IMMEDIATE,
	REGISTER,
	REGISTERL, //low word
	REGISTERH, //high word
	REGISTER_IND
};

struct exec_op_t {
	enum OP_ADDR_t OP_ADDR;
	uint32_t data;
};

enum COND_t{
	COND_NONE,
	COND_ZERO,
	COND_NZERO,
	COND_CARRY,
	COND_NCARRY,
	COND_SIGN,
	COND_NSIGN
};

struct exec_data_t {
	enum EXEC_ACTION_t EXEC_ACTION;
	enum ALU_OP_t ALU_OP;
	enum COND_t COND;
	struct exec_op_t *in_op1;
	struct exec_op_t *in_op2;
	struct exec_op_t *out_op;
	uint32_t address; // used only for the gui hints (for now)
	uint8_t valid;
	uint8_t cycles_left;
};

char* EXEC_ACTION_t_to_string(enum EXEC_ACTION_t in);
char* ALU_OP_t_to_string(enum ALU_OP_t in);
char* COND_t_to_string(enum COND_t in);
char* OP_ADDR_t_to_string(enum OP_ADDR_t in);

void cpu_simdata_free(struct simdata_t *simdata);
int cpu_simdata_malloc(struct simdata_t *simdata);
int cpu_cycle_clock(struct simdata_t *simdata);

// +===================+
// | BIT |    USAGE    |
// |-----+-------------|
// |  0  |    ZERO     |
// |-----+-------------|
// |  1  |    CARRY    |
// |-----+-------------|
// |  2  |    SIGN     |
//
struct registers_t{
	uint32_t GPR[8];
	uint32_t FLAGS;
	uint32_t PC;
	uint32_t SP;
};

#endif
#define CPU_HEADER