Add source code

components/caretaker.py

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+#!/usr/bin/python
+
+class Caretaker:
+	
+	def __init__(self):
+		self.objects=dict() # Create empty objects pool
+		# Add registers to pool
+		for reg in ["MAR","MDR", "PC", "MBR", "SP","LV","CPP","TOS","OPC","H"]:
+			self.objects[reg]=0
+		self.objects["RAM"]=None
+	
+	def __getitem__(self,key):
+		return(self.objects[key])
+
+	def __setitem__(self,key,value):# TODO: Do special treatment for MBR
+		self.objects[key]=value
+		
+	def items(self):
+		return(self.objects.items())	
+	

components/ijvm.py

@@ -0,0 +1,24 @@
+
+# Build IJVM
+ijvm=dict({
+	"BIPUSH":0x10,
+	"DUP":0x59,
+	"GOTO":0xA7,
+	"IADD":0x60,
+	"IAND":0x7E,
+	"IFEQ":0x99,
+	"IFLT":0x9B,
+	"IF_ICMPEQ":0x9F,
+	"IINC":0x84,
+	"ILOAD":0x15,
+	"INVOKEVIRTUAL":0xB6,
+	"IOR":0x80,
+	"IRETURN":0xAC,
+	"ISTORE":0x36,
+	"ISUB":0x64,
+	"LDC_W":0x13,
+	"NOP":0x00,
+	"POP":0x57,
+	"SWAP":0x5F,
+	"WIDE":0xC4
+})

components/microprogram.py

@@ -0,0 +1,103 @@
+
+from components.ijvm import ijvm
+
+class Microprogram:
+	
+	def __init__(self,components):
+		self.c=components
+		if self.c["RAM"]==None:
+			raise RuntimeError("Microprogram initialization fail, RAM is not initialized")
+	
+	def run(self):
+		self.c["LV"]=(1024)# Place stack to 1024
+		self.c["SP"]=(1024-1) # Init SP to LV-1 (because otherwise first element of the stack will be enty because of BIPUSH impl
+		
+		for i in range(1,30): # Launche first 30 insctructions
+			self.fetch() # Fetch
+			self.c["PC"]+=1 # INC PC
+			self.exec() # Execute opcode
+			
+	def fetch(self):
+		opcode=self.c["RAM"].fetch()
+		self.c["MBR"]=opcode # Opcode to MBR
+		
+	def rd(self):
+		data=self.c["RAM"].read()
+		self.c["MDR"]=data
+		
+	def wr(self):
+		self.c["RAM"].write()
+
+	def exec(self):# link: https://users-cs.au.dk/bouvin/dComArk/2015/noter/Note_2/#Instructions
+		opcode=self.c["MBR"] # Get loaded OpCode
+		if opcode==ijvm["NOP"]: # NOP
+			pass
+		elif opcode==ijvm["BIPUSH"]: # BIPUSH
+			self.fetch();self.c["PC"]+=1 # Fetch byte to push in MBR
+			self.c["SP"]+=1 # Increment stack pointer
+			self.c["MAR"]=self.c["SP"] # Copy SP to MAR
+			self.c["MDR"]=self.c["MBR"] # Set MDR to MBR
+			self.c["TOS"]=self.c["MBR"] # Set MDR to MBR
+			self.wr() # Write data to stack
+		elif opcode==ijvm["IADD"]:
+			self.c["SP"]-=1
+			self.c["MAR"]=self.c["SP"]
+			self.c["H"]=self.c["TOS"]
+			self.rd()
+			self.c["TOS"]=self.c["MDR"]+self.c["H"]
+			self.c["MDR"]=self.c["TOS"]
+			self.wr()
+		elif opcode==ijvm["ISUB"]:
+			self.c["SP"]-=1
+			self.c["MAR"]=self.c["SP"]
+			self.c["H"]=self.c["TOS"]
+			self.rd()
+			self.c["TOS"]=self.c["MDR"]-self.c["H"]
+			self.c["MDR"]=self.c["TOS"]
+			self.wr()
+		elif opcode==ijvm["POP"]:
+			self.c["SP"]-=1
+			self.c["MAR"]=self.c["SP"]
+			self.rd()
+			self.c["TOS"]=self.c["MDR"]
+		elif opcode==ijvm["DUP"]:
+			self.c["SP"]+=1
+			self.c["MAR"]=self.c["SP"]
+			self.c["MDR"]=self.c["TOS"]
+			self.wr()
+		elif opcode==ijvm["IAND"]:
+			self.c["SP"]-=1
+			self.c["MAR"]=self.c["SP"]
+			self.c["H"]=self.c["TOS"]
+			self.rd()
+			self.c["TOS"]=(self.c["MDR"] and self.c["H"])
+			self.c["MDR"]=self.c["TOS"]
+			self.wr()
+		elif opcode==ijvm["IOR"]:
+			self.c["SP"]-=1
+			self.c["MAR"]=self.c["SP"]
+			self.c["H"]=self.c["TOS"]
+			self.rd()
+			self.c["TOS"]=(self.c["MDR"] or self.c["H"])
+			self.c["MDR"]=self.c["TOS"]
+			self.wr()
+		elif opcode==ijvm["SWAP"]:
+			self.c["MAR"]=self.c["SP"]-1
+			self.rd()
+			self.c["MAR"]=self.c["SP"]
+			self.c["H"]=self.c["MDR"]
+			self.wr()
+			self.c["MDR"]=self.c["TOS"]
+			self.c["MAR"]=self.c["SP"]-1
+			self.wr()
+			self.c["TOS"]=self.c["H"]
+		else:
+			if opcode in ijvm:
+				print("Instruction {} not yet implemented.".format(ijvm[opcode]))
+			else:
+				raise RuntimeError("Instruction {} not found".format(opcode))
+	
+	def dump(self):
+		print("---------- Stack ----------")
+		self.c["RAM"].dump(self.c["LV"],self.c["SP"])
+		print("---------------------------")

components/ram.py

@@ -0,0 +1,66 @@
+from components.ijvm import ijvm
+
+class Ram:
+	
+	def __init__(self,components,size):
+		self.data=dict()
+		self.lastAddr=size-1
+		self.c=components
+	
+	def loadRamFile(self,filepath):
+		data=dict()
+		addr=0
+		f=open(filepath,"r")
+		for line in f.readlines():
+			line=line.rstrip() # remove \n
+			if line in ijvm:
+				data[addr]=int(ijvm[line])
+			else:
+				data[addr]=int(line,0)
+			addr+=1
+		f.close()
+		self.data=data
+	
+	def write(self):
+		addr=self.c["MAR"]
+		if addr>self.lastAddr:
+			raise ValueError("You get out of the ram by trying to set a value at address {}, max address is {}".format(addr,self.lastAddr))
+		self.data[addr]=self.c["MDR"]
+	
+	def read(self):
+		addr=self.c["MAR"]
+		value=None
+		try:
+			value=self.data[addr]
+		except:
+			if addr>self.lastAddr:
+				raise ValueError("You get out of the ram by trying to get value at address {}, max address is {}".format(addr,self.lastAddr))
+		if(value==None):
+			return(0)
+		return(value)
+		
+	def fetch(self):
+		addr=self.c["PC"]
+		value=None
+		try:
+			value=self.data[addr]
+		except:
+			if addr>self.lastAddr:
+				raise ValueError("You get out of the ram by trying to get value at address {}, max address is {}".format(addr,self.lastAddr))
+		if(value==None):
+			return(0)
+		return(value)
+		
+	def dump(self):
+		print("------- RAM --------")
+		for key,value in self.data.items():
+			#print("{}:{}".format(key,bin(value)[2:]))
+			print("{}:{}".format(key,value))
+		print("--------------------")
+		
+	def dump(self,start,end):
+		for i in range(start,end+1):
+			try:
+				print("{}:{}".format(i,self.data[i]))
+			except:
+				print("{}:0".format(i))

micsim.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python
+
+from components.microprogram import Microprogram
+from components.ram import Ram
+from components.caretaker import Caretaker
+
+c=Caretaker() 					# Init components
+RAM=Ram(c,5000) 				# Init ram
+RAM.loadRamFile("./ram.txt")	# Load Ram from file
+c["RAM"]=RAM 					# Add ram to components
+
+
+mic=Microprogram(c) 			# Create micro program
+mic.run() 						# Run the micro program
+mic.dump() 						# Dump ram
+
+

ram.txt

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+BIPUSH
+5
+BIPUSH
+2
+IADD
+BIPUSH
+10
+POP