[picodrive.git] / pico / sek.c

// This is part of Pico Library\r
\r
// (c) Copyright 2004 Dave, All rights reserved.\r
// (c) Copyright 2006 notaz, All rights reserved.\r
// Free for non-commercial use.\r
\r
// For commercial use, separate licencing terms must be obtained.\r
\r
\r
#include "pico_int.h"\r
#include "memory.h"\r
\r
\r
int SekCycleCnt=0; // cycles done in this frame\r
int SekCycleAim=0; // cycle aim\r
unsigned int SekCycleCntT=0;\r
\r
\r
/* context */\r
// Cyclone 68000\r
#ifdef EMU_C68K\r
struct Cyclone PicoCpuCM68k;\r
#endif\r
// MUSASHI 68000\r
#ifdef EMU_M68K\r
m68ki_cpu_core PicoCpuMM68k;\r
#endif\r
// FAME 68000\r
#ifdef EMU_F68K\r
M68K_CONTEXT PicoCpuFM68k;\r
#endif\r
\r
\r
/* callbacks */\r
#ifdef EMU_C68K\r
// interrupt acknowledgment\r
static int SekIntAck(int level)\r
{\r
  // try to emulate VDP's reaction to 68000 int ack\r
  if     (level == 4) { Pico.video.pending_ints  =  0;    elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
  else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
  PicoCpuCM68k.irq = 0;\r
  return CYCLONE_INT_ACK_AUTOVECTOR;\r
}\r
\r
static void SekResetAck(void)\r
{\r
  elprintf(EL_ANOMALY, "Reset encountered @ %06x", SekPc);\r
}\r
\r
static int SekUnrecognizedOpcode()\r
{\r
  unsigned int pc, op;\r
  pc = SekPc;\r
  op = PicoCpuCM68k.read16(pc);\r
  elprintf(EL_ANOMALY, "Unrecognized Opcode %04x @ %06x", op, pc);\r
  // see if we are not executing trash\r
  if (pc < 0x200 || (pc > Pico.romsize+4 && (pc&0xe00000)!=0xe00000)) {\r
    PicoCpuCM68k.cycles = 0;\r
    PicoCpuCM68k.state_flags |= 1;\r
    return 1;\r
  }\r
#ifdef EMU_M68K // debugging cyclone\r
  {\r
    extern int have_illegal;\r
    have_illegal = 1;\r
  }\r
#endif\r
  return 0;\r
}\r
#endif\r
\r
\r
#ifdef EMU_M68K\r
static int SekIntAckM68K(int level)\r
{\r
  if     (level == 4) { Pico.video.pending_ints  =  0;    elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
  else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
  CPU_INT_LEVEL = 0;\r
  return M68K_INT_ACK_AUTOVECTOR;\r
}\r
\r
static int SekTasCallback(void)\r
{\r
  return 0; // no writeback\r
}\r
#endif\r
\r
\r
#ifdef EMU_F68K\r
static void SekIntAckF68K(unsigned level)\r
{\r
  if     (level == 4) { Pico.video.pending_ints  =  0;    elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
  else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
  PicoCpuFM68k.interrupts[0] = 0;\r
}\r
#endif\r
\r
\r
PICO_INTERNAL void SekInit(void)\r
{\r
#ifdef EMU_C68K\r
  CycloneInit();\r
  memset(&PicoCpuCM68k,0,sizeof(PicoCpuCM68k));\r
  PicoCpuCM68k.IrqCallback=SekIntAck;\r
  PicoCpuCM68k.ResetCallback=SekResetAck;\r
  PicoCpuCM68k.UnrecognizedCallback=SekUnrecognizedOpcode;\r
  PicoCpuCM68k.flags=4;   // Z set\r
#endif\r
#ifdef EMU_M68K\r
  {\r
    void *oldcontext = m68ki_cpu_p;\r
    m68k_set_context(&PicoCpuMM68k);\r
    m68k_set_cpu_type(M68K_CPU_TYPE_68000);\r
    m68k_init();\r
    m68k_set_int_ack_callback(SekIntAckM68K);\r
    m68k_set_tas_instr_callback(SekTasCallback);\r
    //m68k_pulse_reset();\r
    m68k_set_context(oldcontext);\r
  }\r
#endif\r
#ifdef EMU_F68K\r
  {\r
    void *oldcontext = g_m68kcontext;\r
    g_m68kcontext = &PicoCpuFM68k;\r
    memset(&PicoCpuFM68k, 0, sizeof(PicoCpuFM68k));\r
    fm68k_init();\r
    PicoCpuFM68k.iack_handler = SekIntAckF68K;\r
    PicoCpuFM68k.sr = 0x2704; // Z flag\r
    g_m68kcontext = oldcontext;\r
  }\r
#endif\r
}\r
\r
\r
// Reset the 68000:\r
PICO_INTERNAL int SekReset(void)\r
{\r
  if (Pico.rom==NULL) return 1;\r
\r
#ifdef EMU_C68K\r
  CycloneReset(&PicoCpuCM68k);\r
#endif\r
#ifdef EMU_M68K\r
  m68k_set_context(&PicoCpuMM68k); // if we ever reset m68k, we always need it's context to be set\r
  m68ki_cpu.sp[0]=0;\r
  m68k_set_irq(0);\r
  m68k_pulse_reset();\r
  REG_USP = 0; // ?\r
#endif\r
#ifdef EMU_F68K\r
  {\r
    g_m68kcontext = &PicoCpuFM68k;\r
    fm68k_reset();\r
  }\r
#endif\r
\r
  return 0;\r
}\r
\r
void SekStepM68k(void)\r
{\r
  SekCycleAim=SekCycleCnt+1;\r
#if defined(EMU_CORE_DEBUG)\r
  SekCycleCnt+=CM_compareRun(1, 0);\r
#elif defined(EMU_C68K)\r
  PicoCpuCM68k.cycles=1;\r
  CycloneRun(&PicoCpuCM68k);\r
  SekCycleCnt+=1-PicoCpuCM68k.cycles;\r
#elif defined(EMU_M68K)\r
  SekCycleCnt+=m68k_execute(1);\r
#elif defined(EMU_F68K)\r
  SekCycleCnt+=fm68k_emulate(1, 0, 0);\r
#endif\r
}\r
\r
PICO_INTERNAL void SekSetRealTAS(int use_real)\r
{\r
#ifdef EMU_C68K\r
  CycloneSetRealTAS(use_real);\r
#endif\r
#ifdef EMU_F68K\r
  // TODO\r
#endif\r
}\r
\r
\r
/* idle loop detection, not to be used in CD mode */\r
#ifdef EMU_C68K\r
#include "cpu/Cyclone/tools/idle.h"\r
#endif\r
\r
static unsigned short **idledet_ptrs = NULL;\r
static int idledet_count = 0, idledet_bads = 0;\r
int idledet_start_frame = 0;\r
\r
#if 0\r
#define IDLE_STATS 1\r
unsigned int idlehit_addrs[128], idlehit_counts[128];\r
\r
void SekRegisterIdleHit(unsigned int pc)\r
{\r
  int i;\r
  for (i = 0; i < 127 && idlehit_addrs[i]; i++) {\r
    if (idlehit_addrs[i] == pc) {\r
      idlehit_counts[i]++;\r
      return;\r
    }\r
  }\r
  idlehit_addrs[i] = pc;\r
  idlehit_counts[i] = 1;\r
  idlehit_addrs[i+1] = 0;\r
}\r
#endif\r
\r
void SekInitIdleDet(void)\r
{\r
  unsigned short **tmp = realloc(idledet_ptrs, 0x200*4);\r
  if (tmp == NULL) {\r
    free(idledet_ptrs);\r
    idledet_ptrs = NULL;\r
  }\r
  else\r
    idledet_ptrs = tmp;\r
  idledet_count = idledet_bads = 0;\r
  idledet_start_frame = Pico.m.frame_count + 360;\r
#ifdef IDLE_STATS\r
  idlehit_addrs[0] = 0;\r
#endif\r
\r
#ifdef EMU_C68K\r
  CycloneInitIdle();\r
#endif\r
#ifdef EMU_F68K\r
  fm68k_emulate(0, 0, 1);\r
#endif\r
}\r
\r
int SekIsIdleCode(unsigned short *dst, int bytes)\r
{\r
  // printf("SekIsIdleCode %04x %i\n", *dst, bytes);\r
  switch (bytes)\r
  {\r
    case 2:\r
      if ((*dst & 0xf000) != 0x6000)     // not another branch\r
        return 1;\r
      break;\r
    case 4:\r
      if (  (*dst & 0xfff8) == 0x4a10 || // tst.b ($aX)      // there should be no need to wait\r
            (*dst & 0xfff8) == 0x4a28 || // tst.b ($xxxx,a0) // for byte change anywhere\r
            (*dst & 0xff3f) == 0x4a38 || // tst.x ($xxxx.w); tas ($xxxx.w)\r
            (*dst & 0xc1ff) == 0x0038 || // move.x ($xxxx.w), dX\r
            (*dst & 0xf13f) == 0xb038)   // cmp.x ($xxxx.w), dX\r
        return 1;\r
      break;\r
    case 6:\r
      if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM and\r
            *dst == 0x4a39 ||            //   tst.b ($xxxxxxxx)\r
            *dst == 0x4a79 ||            //   tst.w ($xxxxxxxx)\r
            *dst == 0x4ab9 ||            //   tst.l ($xxxxxxxx)\r
            (*dst & 0xc1ff) == 0x0039 || //   move.x ($xxxxxxxx), dX\r
            (*dst & 0xf13f) == 0xb039))||//   cmp.x ($xxxxxxxx), dX\r
            *dst == 0x0838 ||            // btst $X, ($xxxx.w) [6 byte op]\r
            (*dst & 0xffbf) == 0x0c38)   // cmpi.{b,w} $X, ($xxxx.w)\r
        return 1;\r
      break;\r
    case 8:\r
      if ( ((dst[2] & 0xe0) == 0xe0 && ( // RAM and\r
            *dst == 0x0839 ||            //   btst $X, ($xxxxxxxx.w) [8 byte op]\r
            (*dst & 0xffbf) == 0x0c39))||//   cmpi.{b,w} $X, ($xxxxxxxx)\r
            *dst == 0x0cb8)              // cmpi.l $X, ($xxxx.w)\r
        return 1;\r
      break;\r
    case 12:\r
       if ((*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX\r
            (dst[1]&0xf100) == 0x0000 && // arithmetic\r
            (dst[3]&0xf100) == 0x0000)   // arithmetic\r
        return 1;\r
      break;\r
  }\r
\r
  return 0;\r
}\r
\r
int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop, void *ctx)\r
{\r
  int is_main68k = 1;\r
  u16 *target;\r
  uptr v;\r
\r
#if   defined(EMU_C68K)\r
  struct Cyclone *cyc = ctx;\r
  is_main68k = cyc == &PicoCpuCM68k;\r
  pc -= cyc->membase;\r
#elif defined(EMU_F68K)\r
  is_main68k = ctx == &PicoCpuFM68k;\r
#endif\r
  pc &= ~0xff000000;\r
  elprintf(EL_IDLE, "idle: patch %06x %04x %04x %c %c #%i", pc, oldop, newop,\r
    (newop&0x200)?'n':'y', is_main68k?'m':'s', idledet_count);\r
\r
  // XXX: probably shouldn't patch RAM too\r
  v = m68k_read16_map[pc >> M68K_MEM_SHIFT];\r
  if (!(v & 0x80000000))\r
    target = (u16 *)((v << 1) + pc);\r
  else {\r
    if (++idledet_bads > 128)\r
      return 2; // remove detector\r
    return 1; // don't patch\r
  }\r
\r
  if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {\r
    unsigned short **tmp = realloc(idledet_ptrs, (idledet_count+0x200)*4);\r
    if (tmp == NULL)\r
      return 1;\r
    idledet_ptrs = tmp;\r
  }\r
\r
  idledet_ptrs[idledet_count++] = target;\r
\r
  return 0;\r
}\r
\r
void SekFinishIdleDet(void)\r
{\r
#ifdef EMU_C68K\r
  CycloneFinishIdle();\r
#endif\r
#ifdef EMU_F68K\r
  fm68k_emulate(0, 0, 2);\r
#endif\r
  while (idledet_count > 0)\r
  {\r
    unsigned short *op = idledet_ptrs[--idledet_count];\r
    if      ((*op & 0xfd00) == 0x7100)\r
      *op &= 0xff, *op |= 0x6600;\r
    else if ((*op & 0xfd00) == 0x7500)\r
      *op &= 0xff, *op |= 0x6700;\r
    else if ((*op & 0xfd00) == 0x7d00)\r
      *op &= 0xff, *op |= 0x6000;\r
    else\r
      elprintf(EL_STATUS|EL_IDLE, "idle: don't know how to restore %04x", *op);\r
  }\r
}\r
\r
\r
#if defined(EMU_M68K) && M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER\r
static unsigned char op_flags[0x400000/2] = { 0, };\r
static int atexit_set = 0;\r
\r
static void make_idc(void)\r
{\r
  FILE *f = fopen("idc.idc", "w");\r
  int i;\r
  if (!f) return;\r
  fprintf(f, "#include <idc.idc>\nstatic main() {\n");\r
  for (i = 0; i < 0x400000/2; i++)\r
    if (op_flags[i] != 0)\r
      fprintf(f, "  MakeCode(0x%06x);\n", i*2);\r
  fprintf(f, "}\n");\r
  fclose(f);\r
}\r
\r
void instruction_hook(void)\r
{\r
  if (!atexit_set) {\r
    atexit(make_idc);\r
    atexit_set = 1;\r
  }\r
  if (REG_PC < 0x400000)\r
    op_flags[REG_PC/2] = 1;\r
}\r
#endif\r
Commit	Line	Data
	1	// This is part of Pico Library\r
	2	\r
	3	// (c) Copyright 2004 Dave, All rights reserved.\r
	4	// (c) Copyright 2006 notaz, All rights reserved.\r
	5	// Free for non-commercial use.\r
	6	\r
	7	// For commercial use, separate licencing terms must be obtained.\r
	8	\r
	9	\r
	10	#include "pico_int.h"\r
	11	#include "memory.h"\r
	12	\r
	13	\r
	14	int SekCycleCnt=0; // cycles done in this frame\r
	15	int SekCycleAim=0; // cycle aim\r
	16	unsigned int SekCycleCntT=0;\r
	17	\r
	18	\r
	19	/* context */\r
	20	// Cyclone 68000\r
	21	#ifdef EMU_C68K\r
	22	struct Cyclone PicoCpuCM68k;\r
	23	#endif\r
	24	// MUSASHI 68000\r
	25	#ifdef EMU_M68K\r
	26	m68ki_cpu_core PicoCpuMM68k;\r
	27	#endif\r
	28	// FAME 68000\r
	29	#ifdef EMU_F68K\r
	30	M68K_CONTEXT PicoCpuFM68k;\r
	31	#endif\r
	32	\r
	33	\r
	34	/* callbacks */\r
	35	#ifdef EMU_C68K\r
	36	// interrupt acknowledgment\r
	37	static int SekIntAck(int level)\r
	38	{\r
	39	// try to emulate VDP's reaction to 68000 int ack\r
	40	if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
	41	else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
	42	PicoCpuCM68k.irq = 0;\r
	43	return CYCLONE_INT_ACK_AUTOVECTOR;\r
	44	}\r
	45	\r
	46	static void SekResetAck(void)\r
	47	{\r
	48	elprintf(EL_ANOMALY, "Reset encountered @ %06x", SekPc);\r
	49	}\r
	50	\r
	51	static int SekUnrecognizedOpcode()\r
	52	{\r
	53	unsigned int pc, op;\r
	54	pc = SekPc;\r
	55	op = PicoCpuCM68k.read16(pc);\r
	56	elprintf(EL_ANOMALY, "Unrecognized Opcode %04x @ %06x", op, pc);\r
	57	// see if we are not executing trash\r
	58	if (pc < 0x200 \|\| (pc > Pico.romsize+4 && (pc&0xe00000)!=0xe00000)) {\r
	59	PicoCpuCM68k.cycles = 0;\r
	60	PicoCpuCM68k.state_flags \|= 1;\r
	61	return 1;\r
	62	}\r
	63	#ifdef EMU_M68K // debugging cyclone\r
	64	{\r
	65	extern int have_illegal;\r
	66	have_illegal = 1;\r
	67	}\r
	68	#endif\r
	69	return 0;\r
	70	}\r
	71	#endif\r
	72	\r
	73	\r
	74	#ifdef EMU_M68K\r
	75	static int SekIntAckM68K(int level)\r
	76	{\r
	77	if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
	78	else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
	79	CPU_INT_LEVEL = 0;\r
	80	return M68K_INT_ACK_AUTOVECTOR;\r
	81	}\r
	82	\r
	83	static int SekTasCallback(void)\r
	84	{\r
	85	return 0; // no writeback\r
	86	}\r
	87	#endif\r
	88	\r
	89	\r
	90	#ifdef EMU_F68K\r
	91	static void SekIntAckF68K(unsigned level)\r
	92	{\r
	93	if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
	94	else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r
	95	PicoCpuFM68k.interrupts[0] = 0;\r
	96	}\r
	97	#endif\r
	98	\r
	99	\r
	100	PICO_INTERNAL void SekInit(void)\r
	101	{\r
	102	#ifdef EMU_C68K\r
	103	CycloneInit();\r
	104	memset(&PicoCpuCM68k,0,sizeof(PicoCpuCM68k));\r
	105	PicoCpuCM68k.IrqCallback=SekIntAck;\r
	106	PicoCpuCM68k.ResetCallback=SekResetAck;\r
	107	PicoCpuCM68k.UnrecognizedCallback=SekUnrecognizedOpcode;\r
	108	PicoCpuCM68k.flags=4; // Z set\r
	109	#endif\r
	110	#ifdef EMU_M68K\r
	111	{\r
	112	void *oldcontext = m68ki_cpu_p;\r
	113	m68k_set_context(&PicoCpuMM68k);\r
	114	m68k_set_cpu_type(M68K_CPU_TYPE_68000);\r
	115	m68k_init();\r
	116	m68k_set_int_ack_callback(SekIntAckM68K);\r
	117	m68k_set_tas_instr_callback(SekTasCallback);\r
	118	//m68k_pulse_reset();\r
	119	m68k_set_context(oldcontext);\r
	120	}\r
	121	#endif\r
	122	#ifdef EMU_F68K\r
	123	{\r
	124	void *oldcontext = g_m68kcontext;\r
	125	g_m68kcontext = &PicoCpuFM68k;\r
	126	memset(&PicoCpuFM68k, 0, sizeof(PicoCpuFM68k));\r
	127	fm68k_init();\r
	128	PicoCpuFM68k.iack_handler = SekIntAckF68K;\r
	129	PicoCpuFM68k.sr = 0x2704; // Z flag\r
	130	g_m68kcontext = oldcontext;\r
	131	}\r
	132	#endif\r
	133	}\r
	134	\r
	135	\r
	136	// Reset the 68000:\r
	137	PICO_INTERNAL int SekReset(void)\r
	138	{\r
	139	if (Pico.rom==NULL) return 1;\r
	140	\r
	141	#ifdef EMU_C68K\r
	142	CycloneReset(&PicoCpuCM68k);\r
	143	#endif\r
	144	#ifdef EMU_M68K\r
	145	m68k_set_context(&PicoCpuMM68k); // if we ever reset m68k, we always need it's context to be set\r
	146	m68ki_cpu.sp[0]=0;\r
	147	m68k_set_irq(0);\r
	148	m68k_pulse_reset();\r
	149	REG_USP = 0; // ?\r
	150	#endif\r
	151	#ifdef EMU_F68K\r
	152	{\r
	153	g_m68kcontext = &PicoCpuFM68k;\r
	154	fm68k_reset();\r
	155	}\r
	156	#endif\r
	157	\r
	158	return 0;\r
	159	}\r
	160	\r
	161	void SekStepM68k(void)\r
	162	{\r
	163	SekCycleAim=SekCycleCnt+1;\r
	164	#if defined(EMU_CORE_DEBUG)\r
	165	SekCycleCnt+=CM_compareRun(1, 0);\r
	166	#elif defined(EMU_C68K)\r
	167	PicoCpuCM68k.cycles=1;\r
	168	CycloneRun(&PicoCpuCM68k);\r
	169	SekCycleCnt+=1-PicoCpuCM68k.cycles;\r
	170	#elif defined(EMU_M68K)\r
	171	SekCycleCnt+=m68k_execute(1);\r
	172	#elif defined(EMU_F68K)\r
	173	SekCycleCnt+=fm68k_emulate(1, 0, 0);\r
	174	#endif\r
	175	}\r
	176	\r
	177	PICO_INTERNAL void SekSetRealTAS(int use_real)\r
	178	{\r
	179	#ifdef EMU_C68K\r
	180	CycloneSetRealTAS(use_real);\r
	181	#endif\r
	182	#ifdef EMU_F68K\r
	183	// TODO\r
	184	#endif\r
	185	}\r
	186	\r
	187	\r
	188	/* idle loop detection, not to be used in CD mode */\r
	189	#ifdef EMU_C68K\r
	190	#include "cpu/Cyclone/tools/idle.h"\r
	191	#endif\r
	192	\r
	193	static unsigned short **idledet_ptrs = NULL;\r
	194	static int idledet_count = 0, idledet_bads = 0;\r
	195	int idledet_start_frame = 0;\r
	196	\r
	197	#if 0\r
	198	#define IDLE_STATS 1\r
	199	unsigned int idlehit_addrs[128], idlehit_counts[128];\r
	200	\r
	201	void SekRegisterIdleHit(unsigned int pc)\r
	202	{\r
	203	int i;\r
	204	for (i = 0; i < 127 && idlehit_addrs[i]; i++) {\r
	205	if (idlehit_addrs[i] == pc) {\r
	206	idlehit_counts[i]++;\r
	207	return;\r
	208	}\r
	209	}\r
	210	idlehit_addrs[i] = pc;\r
	211	idlehit_counts[i] = 1;\r
	212	idlehit_addrs[i+1] = 0;\r
	213	}\r
	214	#endif\r
	215	\r
	216	void SekInitIdleDet(void)\r
	217	{\r
	218	unsigned short *tmp = realloc(idledet_ptrs, 0x2004);\r
	219	if (tmp == NULL) {\r
	220	free(idledet_ptrs);\r
	221	idledet_ptrs = NULL;\r
	222	}\r
	223	else\r
	224	idledet_ptrs = tmp;\r
	225	idledet_count = idledet_bads = 0;\r
	226	idledet_start_frame = Pico.m.frame_count + 360;\r
	227	#ifdef IDLE_STATS\r
	228	idlehit_addrs[0] = 0;\r
	229	#endif\r
	230	\r
	231	#ifdef EMU_C68K\r
	232	CycloneInitIdle();\r
	233	#endif\r
	234	#ifdef EMU_F68K\r
	235	fm68k_emulate(0, 0, 1);\r
	236	#endif\r
	237	}\r
	238	\r
	239	int SekIsIdleCode(unsigned short *dst, int bytes)\r
	240	{\r
	241	// printf("SekIsIdleCode %04x %i\n", *dst, bytes);\r
	242	switch (bytes)\r
	243	{\r
	244	case 2:\r
	245	if ((*dst & 0xf000) != 0x6000) // not another branch\r
	246	return 1;\r
	247	break;\r
	248	case 4:\r
	249	if ( (*dst & 0xfff8) == 0x4a10 \|\| // tst.b ($aX) // there should be no need to wait\r
	250	(*dst & 0xfff8) == 0x4a28 \|\| // tst.b ($xxxx,a0) // for byte change anywhere\r
	251	(*dst & 0xff3f) == 0x4a38 \|\| // tst.x ($xxxx.w); tas ($xxxx.w)\r
	252	(*dst & 0xc1ff) == 0x0038 \|\| // move.x ($xxxx.w), dX\r
	253	(*dst & 0xf13f) == 0xb038) // cmp.x ($xxxx.w), dX\r
	254	return 1;\r
	255	break;\r
	256	case 6:\r
	257	if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM and\r
	258	*dst == 0x4a39 \|\| // tst.b ($xxxxxxxx)\r
	259	*dst == 0x4a79 \|\| // tst.w ($xxxxxxxx)\r
	260	*dst == 0x4ab9 \|\| // tst.l ($xxxxxxxx)\r
	261	(*dst & 0xc1ff) == 0x0039 \|\| // move.x ($xxxxxxxx), dX\r
	262	(*dst & 0xf13f) == 0xb039))\|\|// cmp.x ($xxxxxxxx), dX\r
	263	*dst == 0x0838 \|\| // btst $X, ($xxxx.w) [6 byte op]\r
	264	(*dst & 0xffbf) == 0x0c38) // cmpi.{b,w} $X, ($xxxx.w)\r
	265	return 1;\r
	266	break;\r
	267	case 8:\r
	268	if ( ((dst[2] & 0xe0) == 0xe0 && ( // RAM and\r
	269	*dst == 0x0839 \|\| // btst $X, ($xxxxxxxx.w) [8 byte op]\r
	270	(*dst & 0xffbf) == 0x0c39))\|\|// cmpi.{b,w} $X, ($xxxxxxxx)\r
	271	*dst == 0x0cb8) // cmpi.l $X, ($xxxx.w)\r
	272	return 1;\r
	273	break;\r
	274	case 12:\r
	275	if ((*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX\r
	276	(dst[1]&0xf100) == 0x0000 && // arithmetic\r
	277	(dst[3]&0xf100) == 0x0000) // arithmetic\r
	278	return 1;\r
	279	break;\r
	280	}\r
	281	\r
	282	return 0;\r
	283	}\r
	284	\r
	285	int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop, void *ctx)\r
	286	{\r
	287	int is_main68k = 1;\r
	288	u16 *target;\r
	289	uptr v;\r
	290	\r
	291	#if defined(EMU_C68K)\r
	292	struct Cyclone *cyc = ctx;\r
	293	is_main68k = cyc == &PicoCpuCM68k;\r
	294	pc -= cyc->membase;\r
	295	#elif defined(EMU_F68K)\r
	296	is_main68k = ctx == &PicoCpuFM68k;\r
	297	#endif\r
	298	pc &= ~0xff000000;\r
	299	elprintf(EL_IDLE, "idle: patch %06x %04x %04x %c %c #%i", pc, oldop, newop,\r
	300	(newop&0x200)?'n':'y', is_main68k?'m':'s', idledet_count);\r
	301	\r
	302	// XXX: probably shouldn't patch RAM too\r
	303	v = m68k_read16_map[pc >> M68K_MEM_SHIFT];\r
	304	if (!(v & 0x80000000))\r
	305	target = (u16 *)((v << 1) + pc);\r
	306	else {\r
	307	if (++idledet_bads > 128)\r
	308	return 2; // remove detector\r
	309	return 1; // don't patch\r
	310	}\r
	311	\r
	312	if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {\r
	313	unsigned short *tmp = realloc(idledet_ptrs, (idledet_count+0x200)4);\r
	314	if (tmp == NULL)\r
	315	return 1;\r
	316	idledet_ptrs = tmp;\r
	317	}\r
	318	\r
	319	idledet_ptrs[idledet_count++] = target;\r
	320	\r
	321	return 0;\r
	322	}\r
	323	\r
	324	void SekFinishIdleDet(void)\r
	325	{\r
	326	#ifdef EMU_C68K\r
	327	CycloneFinishIdle();\r
	328	#endif\r
	329	#ifdef EMU_F68K\r
	330	fm68k_emulate(0, 0, 2);\r
	331	#endif\r
	332	while (idledet_count > 0)\r
	333	{\r
	334	unsigned short *op = idledet_ptrs[--idledet_count];\r
	335	if ((*op & 0xfd00) == 0x7100)\r
	336	op &= 0xff, op \|= 0x6600;\r
	337	else if ((*op & 0xfd00) == 0x7500)\r
	338	op &= 0xff, op \|= 0x6700;\r
	339	else if ((*op & 0xfd00) == 0x7d00)\r
	340	op &= 0xff, op \|= 0x6000;\r
	341	else\r
	342	elprintf(EL_STATUS\|EL_IDLE, "idle: don't know how to restore %04x", *op);\r
	343	}\r
	344	}\r
	345	\r
	346	\r
	347	#if defined(EMU_M68K) && M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER\r
	348	static unsigned char op_flags[0x400000/2] = { 0, };\r
	349	static int atexit_set = 0;\r
	350	\r
	351	static void make_idc(void)\r
	352	{\r
	353	FILE *f = fopen("idc.idc", "w");\r
	354	int i;\r
	355	if (!f) return;\r
	356	fprintf(f, "#include <idc.idc>\nstatic main() {\n");\r
	357	for (i = 0; i < 0x400000/2; i++)\r
	358	if (op_flags[i] != 0)\r
	359	fprintf(f, " MakeCode(0x%06x);\n", i*2);\r
	360	fprintf(f, "}\n");\r
	361	fclose(f);\r
	362	}\r
	363	\r
	364	void instruction_hook(void)\r
	365	{\r
	366	if (!atexit_set) {\r
	367	atexit(make_idc);\r
	368	atexit_set = 1;\r
	369	}\r
	370	if (REG_PC < 0x400000)\r
	371	op_flags[REG_PC/2] = 1;\r
	372	}\r
	373	#endif\r