Reverted do_cycles change, as it caused a performance loss under JIT

src/events.cpp

@@ -251,7 +251,7 @@ static bool event_check_vsync(void)
 	return false;
 }
 
-void do_cycles_slow(unsigned long cycles_to_add)
+void do_cycles_cpu_fastest(uae_u32 cycles_to_add)
 {
 	if (!currprefs.cpu_thread) {
 		if ((pissoff -= cycles_to_add) >= 0)
@@ -284,12 +284,31 @@ void do_cycles_slow(unsigned long cycles_to_add)
 			}
 		}
 		events_schedule ();
+	}
+	currcycle += cycles_to_add;
+}
 
+void do_cycles_cpu_norm(uae_u32 cycles_to_add)
+{
+	while ((nextevent - currcycle) <= cycles_to_add)
+	{
+		cycles_to_add -= (nextevent - currcycle);
+		currcycle = nextevent;
 
+		for (auto& i : eventtab)
+		{
+			if (i.active && i.evtime == currcycle)
+			{
+				(*i.handler)();
+			}
+		}
+		events_schedule();
 	}
 	currcycle += cycles_to_add;
 }
 
+do_cycles_func do_cycles = do_cycles_cpu_norm;
+
 void MISC_handler (void)
 {
 	static bool dorecheck;

src/include/events.h

@@ -37,7 +37,8 @@ typedef void (*evfunc2)(uae_u32);
 
 typedef void (*do_cycles_func)(uae_u32);
 extern do_cycles_func do_cycles;
-void do_cycles_slow(unsigned long cycles_to_add);
+void do_cycles_cpu_fastest(uae_u32 cycles_to_add);
+void do_cycles_cpu_norm(uae_u32 cycles_to_add);
 
 typedef unsigned long int evt;
 
@@ -71,7 +72,6 @@ extern int pissoff_value;
 extern uae_s32 pissoff;
 
 #define countdown pissoff
-#define do_cycles do_cycles_slow
 
 extern struct ev eventtab[ev_max];
 extern struct ev2 eventtab2[ev2_max];

src/newcpu.cpp

@@ -492,6 +492,11 @@ static void update_68k_cycles(void)
 		}
 	}
 
+	if (currprefs.m68k_speed < 0 || currprefs.cachesize > 0)
+		do_cycles = do_cycles_cpu_fastest;
+	else
+		do_cycles = do_cycles_cpu_norm;
+
 	set_config_changed();
 }