From 376a36bf5706fac8d16e3a7a022cec93f09cae4f Mon Sep 17 00:00:00 2001
From: ~skmp <skmp@nillware.com>
Date: Tue, 17 Feb 2015 00:55:11 +0200
Subject: [PATCH] Emscripten: Hacky support, can boot bios

- Add TARGET_BOUNDED_EXECUTION, TARGET_EMSCRIPTEN
- Add emscripten makefile

Of course, there's no jit at this point
---
 core/hw/sh4/interpr/sh4_interpreter.cpp |  9 +++-
 core/linux-dist/main.cpp                | 29 +++++++----
 core/nullDC.cpp                         |  9 ++--
 shell/emscripten/Makefile               | 66 +++++++++++++++++++++++++
 4 files changed, 98 insertions(+), 15 deletions(-)
 create mode 100644 shell/emscripten/Makefile

diff --git a/core/hw/sh4/interpr/sh4_interpreter.cpp b/core/hw/sh4/interpr/sh4_interpreter.cpp
index 2ba673c18..918edeeb2 100644
--- a/core/hw/sh4/interpr/sh4_interpreter.cpp
+++ b/core/hw/sh4/interpr/sh4_interpreter.cpp
@@ -38,7 +38,11 @@ void Sh4_int_Run()
 
 	s32 l=SH4_TIMESLICE;
 
+#if !defined(TARGET_BOUNDED_EXECUTION)
 	do
+#else
+	for (int i=0; i<10000; i++)
+#endif
 	{
 		do
 		{
@@ -50,10 +54,13 @@ void Sh4_int_Run()
 		} while(l>0);
 		l+=SH4_TIMESLICE;
 		UpdateSystem_INTC();
-
+#if !defined(TARGET_BOUNDED_EXECUTION)
 	} while(sh4_int_bCpuRun);
 
 	sh4_int_bCpuRun=false;
+#else
+	}
+#endif
 }
 
 void Sh4_int_Stop()
diff --git a/core/linux-dist/main.cpp b/core/linux-dist/main.cpp
index 84bc16ecf..e08e47956 100755
--- a/core/linux-dist/main.cpp
+++ b/core/linux-dist/main.cpp
@@ -32,7 +32,7 @@
 	map<int, int> x11_keymap;
 #endif
 
-#if !defined(ANDROID) && HOST_OS != OS_DARWIN
+#if !defined(ANDROID) && HOST_OS != OS_DARWIN && !defined(TARGET_EMSCRIPTEN)
 	#include <linux/joystick.h>
 	#include <sys/stat.h> 
 	#include <sys/types.h> 
@@ -138,8 +138,7 @@ void SetupInput()
 		rt[port]=0;
 		lt[port]=0;
 	}
-
-#if HOST_OS != OS_DARWIN
+#if HOST_OS != OS_DARWIN && !defined(TARGET_EMSCRIPTEN)
 	if (true) {
 		#ifdef TARGET_PANDORA
 		const char* device = "/dev/input/event4";
@@ -160,10 +159,10 @@ void SetupInput()
 		else
 			perror("evdev open");
 	}
-#endif
+
 	// Open joystick device
 	JoyFD = open("/dev/input/js0",O_RDONLY);
-#if HOST_OS != OS_DARWIN		
+	
 	if(JoyFD>=0)
 	{
 		int AxisCount,ButtonCount;
@@ -191,7 +190,7 @@ void SetupInput()
 }
 
 bool HandleKb(u32 port) {
-#if HOST_OS != OS_DARWIN
+#if HOST_OS != OS_DARWIN && !defined(TARGET_EMSCRIPTEN)
 	if (kbfd < 0)
 		return false;
 
@@ -297,7 +296,7 @@ bool HandleJoystick(u32 port)
   // Joystick must be connected
   if(JoyFD<0) return false;
 
-#if HOST_OS != OS_DARWIN
+#if HOST_OS != OS_DARWIN && !defined(TARGET_EMSCRIPTEN)
   struct js_event JE;
   while(read(JoyFD,&JE,sizeof(JE))==sizeof(JE))
 	  if (JE.number<MAP_SIZE)
@@ -784,13 +783,13 @@ int main(int argc, wchar* argv[])
 	//if (argc==2) 
 		//ndcid=atoi(argv[1]);
 
-	if (setup_curses() < 0) die("failed to setup curses!\n");
+	if (setup_curses() < 0) printf("failed to setup curses!\n");
 #ifdef TARGET_PANDORA
 	signal(SIGSEGV, clean_exit);
 	signal(SIGKILL, clean_exit);
 #endif
 
-#if defined(USES_HOMEDIR) && HOST_OS != OS_DARWIN
+#if defined(USES_HOMEDIR) && HOST_OS != OS_DARWIN && !defined(TARGET_EMSCRIPTEN)
 	string home = (string)getenv("HOME");
 	if(home.c_str())
 	{
@@ -835,7 +834,12 @@ int main(int argc, wchar* argv[])
 		
 	dc_init(argc,argv);
 
-	dc_run();
+#if !defined(TARGET_EMSCRIPTEN)
+	
+#else
+	dc_run();emscripten_set_main_loop(&dc_run, 100, false);
+#endif
+	
 	
 #ifdef TARGET_PANDORA
 	clean_exit(0);
@@ -852,5 +856,10 @@ int push_vmu_screen(u8* buffer) { return 0; }
 
 void os_DebugBreak()
 {
+#if !defined(TARGET_EMSCRIPTEN)
     raise(SIGTRAP);
+#endif
+	printf("DEBUGBREAK!\n");
+	exit(-1);
+#endif
 }
diff --git a/core/nullDC.cpp b/core/nullDC.cpp
index c9df6fac5..37343a920 100755
--- a/core/nullDC.cpp
+++ b/core/nullDC.cpp
@@ -128,17 +128,16 @@ void plugins_Reset(bool Manual)
 	//libExtDevice_Reset(Manual);
 }
 
+#if !defined(TARGET_NO_WEBUI)
 
 void* webui_th(void* p)
 {
-	#if (HOST_OS == OS_WINDOWS || HOST_OS == OS_LINUX)  && !defined(TARGET_PANDORA) && defined(WEBUI)
-		webui_start();
-	#endif
-
+	webui_start();
 	return 0;
 }
 
 cThread webui_thd(&webui_th,0);
+#endif
 
 int dc_init(int argc,wchar* argv[])
 {
@@ -151,7 +150,9 @@ int dc_init(int argc,wchar* argv[])
 		return -1;
 	}
 
+#if !defined(TARGET_NO_WEBUI)
 	webui_thd.Start();
+#endif
 
 	if(ParseCommandLine(argc,argv))
 	{
diff --git a/shell/emscripten/Makefile b/shell/emscripten/Makefile
new file mode 100644
index 000000000..bc58322f1
--- /dev/null
+++ b/shell/emscripten/Makefile
@@ -0,0 +1,66 @@
+
+LOCAL_PATH := $(call my-dir)
+FOR_LINUX :=1
+NOT_ARM := 1
+NO_REC := 1
+#NO_REND := 1
+NO_NIXPROF := 1
+RZDCY_SRC_DIR = ../../core
+
+include $(RZDCY_SRC_DIR)/core.mk
+
+CC_PREFIX ?= 
+
+CXX=${CC_PREFIX}em++
+CC=${CC_PREFIX}emcc
+#AS=${CC_PREFIX}as
+STRIP=${CC_PREFIX}emstrip
+
+LD=${CC}
+
+MFLAGS := 
+ASFLAGS := 
+
+LDFLAGS	:=	-g -Wl,-Map,$(notdir $@).map,--gc-sections -Wl,-O3 -Wl,--sort-common 
+
+
+CXXFLAGS := -g -O3  -D GLES -D RELEASE -c -D TARGET_EMSCRIPTEN -D TARGET_NO_REC -D TARGET_NO_NVMEM -D TARGET_NO_WEBUI -D TARGET_NO_THREADS -D TARGET_BOUNDED_EXECUTION -D TARGET_NO_EXCEPTIONS
+CXXFLAGS += -fno-strict-aliasing
+CXXFLAGS += -ffast-math
+
+CXXFLAGS += $(CFLAGS) $(MFLAGS) -fno-exceptions -fno-rtti
+
+
+INCS	:= -I$(RZDCY_SRC_DIR) -I$(RZDCY_SRC_DIR)/deps -I$(RZDCY_SRC_DIR)/khronos -I../linux-deps/include
+
+LIBS	:= #emscripten has all the basic libs, and egl, and sdl, built in
+
+OBJECTS=$(RZDCY_FILES:.cpp=.build.obj)
+OBJECTS:=$(OBJECTS:.c=.build.obj)
+OBJECTS:=$(OBJECTS:.S=.build.obj)
+OBJECTS:=$(patsubst $(RZDCY_SRC_DIR)/%,obj/%,$(OBJECTS))
+
+
+EXECUTABLE=reicast.html
+
+all: $(CPPFILES) $(EXECUTABLE)
+	
+$(EXECUTABLE): $(OBJECTS)
+	echo $(RZDCY_FILES)
+	$(CXX) $(MFLAGS) $(EXTRAFLAGS) $(LDFLAGS)  $(OBJECTS) $(LIBS) -o $@ --preload-file data/dc_boot.bin --preload-file data/dc_flash.bin -s TOTAL_MEMORY=96000000
+
+obj/%.build.obj : $(RZDCY_SRC_DIR)/%.cpp
+	mkdir -p $(dir $@)
+	$(CXX) $(EXTRAFLAGS) $(INCS) $(CXXFLAGS) $< -o $@
+	
+obj/%.build.obj : $(RZDCY_SRC_DIR)/%.c
+	mkdir -p $(dir $@)
+	$(CC) $(EXTRAFLAGS) $(INCS) $(CXXFLAGS) $< -o $@
+
+obj/%.build.obj : $(RZDCY_SRC_DIR)/%.S
+	mkdir -p $(dir $@)	
+	$(AS) $(ASFLAGS) $(INCS) $< -o $@
+
+
+clean:
+	rm $(OBJECTS) $(EXECUTABLE) -f