opcode.h


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#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "tables.h"

#define keypoll 0

#define OPNUM 74

#define C (1 << 0) /* Carry flag. */
#define Z (1 << 1) /* Zero flag. */
#define I (1 << 2) /* Interrupt flag. */
#define V (1 << 6) /* oVerflow flag. */
#define N (1 << 7) /* Negative flag. */

extern uint8_t get_addrsize(uint8_t prefix, uint8_t addrmode);
extern char *showbits(uint64_t value, uint8_t bitnum, uint8_t dbg);

/* reg_expr, and val_expr are the arithmetic expressions
 * that will be used for either the value, or register, such as '+', or '-'.
 */
#define setreg(reg, reg_expr, reg_idx, val, val_expr, val_idx, size) {\
	switch (size) {\
		case 7: reg[(reg_idx) reg_expr 7] = val[(val_idx) val_expr 7];\
		case 6: reg[(reg_idx) reg_expr 6] = val[(val_idx) val_expr 6];\
		case 5: reg[(reg_idx) reg_expr 5] = val[(val_idx) val_expr 5];\
		case 4: reg[(reg_idx) reg_expr 4] = val[(val_idx) val_expr 4];\
		case 3: reg[(reg_idx) reg_expr 3] = val[(val_idx) val_expr 3];\
		case 2: reg[(reg_idx) reg_expr 2] = val[(val_idx) val_expr 2];\
		case 1: reg[(reg_idx) reg_expr 1] = val[(val_idx) val_expr 1];\
		case 0: reg[(reg_idx) reg_expr 0] = val[(val_idx) val_expr 0];\
	}\
}

#define setreg_sw(reg, reg_idx, val, val_idx, prefix, addrmode, type) {\
	switch (type) {\
		case RS: setreg(reg, +, reg_idx, val, +, val_idx, (1 << ((prefix >> 4) & 3))-1); break;\
		case AM: setreg(reg, +, reg_idx, val, +, val_idx, get_addrsize(prefix, addrmode)); break;\
	}\
}

extern uint8_t *addr; /* Address Space. */

union reg {
	uint8_t u8[8];
	uint16_t u16[4];
	uint32_t u32[2];
	uint64_t u64;
};

struct sux {
	union reg ps; /* The processor status register. */
	uint64_t a, b, y, x; /* Registers A, B, X, and Y. */
	uint64_t pc; /* Program counter. */
	uint16_t sp; /* Stack pointer. */
	uint16_t stk_st; /* Starting address of each threads stack. */
	uint64_t clk; /* Number of clock cycles.  */
	uint8_t crt; /* Current running threads. */
};

extern int asmmon();

enum sw_type {RS, AM, BYTE};