From: notaz <notasas@gmail.com>
Date: Sun, 8 Sep 2013 13:43:54 +0000 (+0300)
Subject: handle dbra wait loops, update cyclone
X-Git-Tag: v1.90~16
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecc8036ee27ec57454c3fe736a71dd9c0cbcf3de;p=picodrive.git

handle dbra wait loops, update cyclone
---

diff --git a/cpu/cyclone b/cpu/cyclone
index 7ddcd35c..590d780f 160000
--- a/cpu/cyclone
+++ b/cpu/cyclone
@@ -1 +1 @@
-Subproject commit 7ddcd35c8b2a8248257bd89ef989095639c29c08
+Subproject commit 590d780f20871b29fdc803bd2c74b046fd2d0f28
diff --git a/cpu/cyclone_config.h b/cpu/cyclone_config.h
index 7f9690d0..13e2c5ea 100644
--- a/cpu/cyclone_config.h
+++ b/cpu/cyclone_config.h
@@ -10,7 +10,7 @@
 
 #define USE_MS_SYNTAX               0
 #define CYCLONE_FOR_GENESIS         2
-#define COMPRESS_JUMPTABLE          1
+#define COMPRESS_JUMPTABLE          0
 #define MEMHANDLERS_ADDR_MASK       0
 
 #define MEMHANDLERS_NEED_PC         0
diff --git a/cpu/fame/fame.h b/cpu/fame/fame.h
index d5349246..111af88c 100644
--- a/cpu/fame/fame.h
+++ b/cpu/fame/fame.h
@@ -125,6 +125,7 @@ typedef struct
 
 	unsigned int   Opcode;
 	signed int     cycles_needed;
+
 	unsigned short *PC;
 	unsigned long  BasePC;
 	unsigned int   flag_C;
@@ -136,6 +137,9 @@ typedef struct
 	unsigned int   flag_S;
 	unsigned int   flag_I;
 
+	unsigned char  not_polling;
+	unsigned char  pad[3];
+
 	unsigned long  Fetch[M68K_FETCHBANK1];
 } M68K_CONTEXT;
 
diff --git a/cpu/fame/famec_opcodes.h b/cpu/fame/famec_opcodes.h
index 5e09a928..c690b45c 100644
--- a/cpu/fame/famec_opcodes.h
+++ b/cpu/fame/famec_opcodes.h
@@ -1,4 +1,10 @@
 
+#ifdef PICODRIVE_HACK
+#define NOT_POLLING g_m68kcontext->not_polling = 1;
+#else
+#define NOT_POLLING
+#endif
+
 // ORI
 OPCODE(0x0000)
 {
@@ -23298,6 +23304,8 @@ OPCODE(0x51C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	res = DREGu16((Opcode >> 0) & 7);
 	res--;
 	DREGu16((Opcode >> 0) & 7) = res;
@@ -23321,6 +23329,8 @@ OPCODE(0x52C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if ((!flag_NotZ) || (flag_C & 0x100))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23352,6 +23362,8 @@ OPCODE(0x53C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (flag_NotZ && (!(flag_C & 0x100)))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23383,6 +23395,8 @@ OPCODE(0x54C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (flag_C & 0x100)
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23414,6 +23428,8 @@ OPCODE(0x55C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (!(flag_C & 0x100))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23445,6 +23461,8 @@ OPCODE(0x56C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (!flag_NotZ)
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23476,6 +23494,8 @@ OPCODE(0x57C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (flag_NotZ)
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23507,6 +23527,8 @@ OPCODE(0x58C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (flag_V & 0x80)
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23538,6 +23560,8 @@ OPCODE(0x59C8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (!(flag_V & 0x80))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23569,6 +23593,8 @@ OPCODE(0x5AC8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (flag_N & 0x80)
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23600,6 +23626,8 @@ OPCODE(0x5BC8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (!(flag_N & 0x80))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23631,6 +23659,8 @@ OPCODE(0x5CC8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if ((flag_N ^ flag_V) & 0x80)
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23662,6 +23692,8 @@ OPCODE(0x5DC8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (!((flag_N ^ flag_V) & 0x80))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23693,6 +23725,8 @@ OPCODE(0x5EC8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if ((!flag_NotZ) || ((flag_N ^ flag_V) & 0x80))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
@@ -23724,6 +23758,8 @@ OPCODE(0x5FC8)
 	u32 adr, res;
 	u32 src, dst;
 
+	NOT_POLLING
+
 	if (flag_NotZ && (!((flag_N ^ flag_V) & 0x80)))
 	{
 	res = DREGu16((Opcode >> 0) & 7);
diff --git a/cpu/musashi/m68kcpu.c b/cpu/musashi/m68kcpu.c
index d766eb5b..72bb217f 100644
--- a/cpu/musashi/m68kcpu.c
+++ b/cpu/musashi/m68kcpu.c
@@ -832,6 +832,8 @@ int m68k_execute(int num_cycles)
 			m68ki_exception_if_trace(); /* auto-disable (see m68kcpu.h) */
 
 			m68ki_trace_t1(); /* notaz */
+
+			m68ki_cpu_p->not_polling = 1;
 		} // while(GET_CYCLES() > 0); // notaz
 
 		/* set previous PC to current PC for the next entry into the loop */
diff --git a/cpu/musashi/m68kcpu.h b/cpu/musashi/m68kcpu.h
index 7b050f7f..83e92c5f 100644
--- a/cpu/musashi/m68kcpu.h
+++ b/cpu/musashi/m68kcpu.h
@@ -919,6 +919,7 @@ typedef struct
 
 	// notaz
 	sint cyc_remaining_cycles;
+	sint not_polling;
 } m68ki_cpu_core;
 
 // notaz
diff --git a/pico/32x/memory.c b/pico/32x/memory.c
index fd902dd2..722698e7 100644
--- a/pico/32x/memory.c
+++ b/pico/32x/memory.c
@@ -65,7 +65,7 @@ static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
   int ret = 0;
 
   if (a - 2 <= m68k_poll.addr && m68k_poll.addr <= a + 2
-    && cycles - m68k_poll.cycles <= 64)
+    && cycles - m68k_poll.cycles <= 64 && !SekNotPolling)
   {
     if (m68k_poll.cnt++ > POLL_THRESHOLD) {
       if (!(Pico32x.emu_flags & flags)) {
@@ -79,6 +79,7 @@ static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
   else {
     m68k_poll.cnt = 0;
     m68k_poll.addr = a;
+    SekNotPolling = 0;
   }
   m68k_poll.cycles = cycles;
 
@@ -186,15 +187,9 @@ static u32 p32x_reg_read16(u32 a)
     return sh2_comm_faker(a);
 #else
   if ((a & 0x30) == 0x20) {
-    static u32 dr2 = 0;
     unsigned int cycles = SekCyclesDone();
     int comreg = 1 << (a & 0x0f) / 2;
 
-    // evil X-Men proto polls in a dbra loop and expects it to expire..
-    if (SekDar(2) != dr2)
-      m68k_poll.cnt = 0;
-    dr2 = SekDar(2);
-
     if (cycles - msh2.m68krcycles_done > 244
         || (Pico32x.comm_dirty_68k & comreg))
       p32x_sync_sh2s(cycles);
@@ -205,7 +200,6 @@ static u32 p32x_reg_read16(u32 a)
       SekSetStop(1);
       SekEndRun(16);
     }
-    dr2 = SekDar(2);
     goto out;
   }
 #endif
diff --git a/pico/cd/memory.c b/pico/cd/memory.c
index b15e9c8a..47553f57 100644
--- a/pico/cd/memory.c
+++ b/pico/cd/memory.c
@@ -75,9 +75,10 @@ static void remap_word_ram(u32 r3);
 void m68k_comm_check(u32 a)
 {
   pcd_sync_s68k(SekCyclesDone(), 0);
-  if (a != Pico_mcd->m.m68k_poll_a) {
+  if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a) {
     Pico_mcd->m.m68k_poll_a = a;
     Pico_mcd->m.m68k_poll_cnt = 0;
+    SekNotPolling = 0;
     return;
   }
   Pico_mcd->m.m68k_poll_cnt++;
@@ -246,7 +247,7 @@ u32 s68k_poll_detect(u32 a, u32 d)
     return d;
 
   cycles = SekCyclesDoneS68k();
-  if (a == Pico_mcd->m.s68k_poll_a) {
+  if (!SekNotPolling && a == Pico_mcd->m.s68k_poll_a) {
     u32 clkdiff = cycles - Pico_mcd->m.s68k_poll_clk;
     if (clkdiff <= POLL_CYCLES) {
       cnt = Pico_mcd->m.s68k_poll_cnt + 1;
@@ -261,6 +262,7 @@ u32 s68k_poll_detect(u32 a, u32 d)
   Pico_mcd->m.s68k_poll_a = a;
   Pico_mcd->m.s68k_poll_clk = cycles;
   Pico_mcd->m.s68k_poll_cnt = cnt;
+  SekNotPollingS68k = 0;
 #endif
   return d;
 }
diff --git a/pico/pico_int.h b/pico/pico_int.h
index 6096e13b..3a530ca2 100644
--- a/pico/pico_int.h
+++ b/pico/pico_int.h
@@ -51,6 +51,9 @@ extern struct Cyclone PicoCpuCM68k, PicoCpuCS68k;
 #define SekIsStoppedS68k() (PicoCpuCS68k.state_flags&1)
 #define SekShouldInterrupt() (PicoCpuCM68k.irq > (PicoCpuCM68k.srh&7))
 
+#define SekNotPolling     PicoCpuCM68k.not_pol
+#define SekNotPollingS68k PicoCpuCS68k.not_pol
+
 #define SekInterrupt(i) PicoCpuCM68k.irq=i
 #define SekIrqLevel     PicoCpuCM68k.irq
 
@@ -79,6 +82,9 @@ extern M68K_CONTEXT PicoCpuFM68k, PicoCpuFS68k;
 #define SekIsStoppedS68k() (PicoCpuFS68k.execinfo&FM68K_HALTED)
 #define SekShouldInterrupt() fm68k_would_interrupt()
 
+#define SekNotPolling     PicoCpuFM68k.not_polling
+#define SekNotPollingS68k PicoCpuFS68k.not_polling
+
 #define SekInterrupt(irq) PicoCpuFM68k.interrupts[0]=irq
 #define SekIrqLevel       PicoCpuFM68k.interrupts[0]
 
@@ -108,6 +114,9 @@ extern m68ki_cpu_core PicoCpuMM68k, PicoCpuMS68k;
 #define SekIsStoppedS68k() (PicoCpuMS68k.stopped==STOP_LEVEL_STOP)
 #define SekShouldInterrupt() (CPU_INT_LEVEL > FLAG_INT_MASK)
 
+#define SekNotPolling     PicoCpuMM68k.not_polling
+#define SekNotPollingS68k PicoCpuMS68k.not_polling
+
 #define SekInterrupt(irq) { \
 	void *oldcontext = m68ki_cpu_p; \
 	m68k_set_context(&PicoCpuMM68k); \