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#include <stdint.h>
typedef enum {
BIT_MOVEP_IMMED = 0,
MOVE_BYTE,
MOVE_LONG,
MOVE_WORD,
MISC,
QUICK_ARITH_LOOP,
BRANCH,
MOVEQ,
OR_DIV_SBCD,
SUB_SUBX,
RESERVED,
CMP_XOR,
AND_MUL_ABCD_EXG,
ADD_ADDX,
SHIFT_ROTATE,
COPROC
} m68k_optypes;
typedef enum {
M68K_ABCD,
M68K_ADD,
M68K_ADDX,
M68K_AND,
M68K_ANDI_CCR,
M68K_ANDI_SR,
M68K_ASL,
M68K_ASR,
M68K_BCC,
M68K_BCHG,
M68K_BCLR,
M68K_BSET,
M68K_BSR,
M68K_BTST,
M68K_CHK,
M68K_CLR,
M68K_CMP,
M68K_DBCC,
M68K_DIVS,
M68K_DIVU,
M68K_EOR,
M68K_EORI_CCR,
M68K_EORI_SR,
M68K_EXG,
M68K_EXT,
M68K_ILLEGAL,
M68K_JMP,
M68K_JSR,
M68K_LEA,
M68K_LINK,
M68K_LSL,
M68K_LSR,
M68K_MOVE,
M68K_MOVE_CCR,
M68K_MOVE_FROM_SR,
M68K_MOVE_SR,
M68K_MOVE_USP,
M68K_MOVEM,
M68K_MOVEP,
M68K_MULS,
M68K_MULU,
M68K_NBCD,
M68K_NEG,
M68K_NEGX,
M68K_NOP,
M68K_NOT,
M68K_OR,
M68K_ORI_CCR,
M68K_ORI_SR,
M68K_PEA,
M68K_RESET,
M68K_ROL,
M68K_ROR,
M68K_ROXL,
M68K_ROXR,
M68K_RTE,
M68K_RTR,
M68K_RTS,
M68K_SBCD,
M68K_SCC,
M68K_STOP,
M68K_SUB,
M68K_SUBX,
M68K_SWAP,
M68K_TAS,
M68K_TRAP,
M68K_TRAPV,
M68K_TST,
M68K_UNLNK,
M68K_INVALID
} m68K_op;
typedef enum {
VAR_NORMAL,
VAR_QUICK,
VAR_IMMEDIATE,
VAR_BYTE,
VAR_WORD,
VAR_LONG
} m68K_variant;
typedef enum {
OPSIZE_BYTE=0,
OPSIZE_WORD,
OPSIZE_LONG,
OPSIZE_INVALID
} m68K_opsizes;
typedef enum {
//actual addressing mode field values
MODE_REG = 0,
MODE_AREG,
MODE_AREG_INDIRECT,
MODE_AREG_POSTINC,
MODE_AREG_PREDEC,
MODE_AREG_DISPLACE,
MODE_AREG_INDEX_MEM, //bunch of relatively complicated modes
MODE_PC_INDIRECT_ABS_IMMED, //Modes that use the program counter, an absolute address or immediate value
//expanded values
MODE_ABSOLUTE_SHORT,
MODE_ABSOLUTE,
MODE_PC_DISPLACE,
MODE_PC_INDEX,
MODE_IMMEDIATE,
MODE_UNUSED
} m68k_addr_modes;
typedef enum {
COND_TRUE,
COND_FALSE,
COND_HIGH,
COND_LOW_SAME,
COND_CARRY_CLR,
COND_CARRY_SET,
COND_NOT_EQ,
COND_EQ,
COND_OVERF_CLR,
COND_OVERF_SET,
COND_PLUS,
COND_MINUS,
COND_GREATER_EQ,
COND_LESS,
COND_GREATER,
COND_LESS_EQ
} m68K_condition;
typedef struct {
uint8_t addr_mode;
union {
struct {
uint8_t pri;
uint8_t sec;
int32_t displacement;
} regs;
uint8_t u8;
uint16_t u16;
uint32_t u32;
} params;
} m68k_op_info;
typedef struct {
uint8_t op;
uint8_t variant;
union {
uint8_t size;
uint8_t cond;
} extra;
m68k_op_info src;
m68k_op_info dst;
} m68kinst;
uint16_t * m68K_decode(uint16_t * istream, m68kinst * dst);
uint32_t m68k_cycles(m68kinst * inst);
int m68K_disasm(m68kinst * decoded, char * dst);
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