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Add opcodes

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This commit is contained in:
Loic GUEGAN 2018-09-01 10:19:06 +02:00
parent 84de7cd481
commit 739548d99f
4 changed files with 48 additions and 8 deletions
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9
components/caretaker.py
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@ -9,7 +9,14 @@ class Caretaker:
self.objects[reg]=0
self.objects["RAM"]=None
def __getitem__(self,key): # TODO: Allow MBRU key and adapt its return value
def __getitem__(self,key):
if key=="MBRU": # If we ask for unsigned
return(self.objects["MBR"] & 0x000000FF)
elif key=="MBR": # If we ask for signed
if self.objects["MBR"]>=0:
return(self["MBRU"])
else: # Send 2 complement if it's lower than 0
return(self.objects["MBR"] & 0xFFFFFFFF)
return(self.objects[key])
def __setitem__(self,key,value):# TODO: Do special treatment for MBR (allow only 2^8 value)

32
components/microprogram.py
View file

@ -86,7 +86,7 @@ class Microprogram:
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["TOS"]=(self.c["MDR"] & self.c["H"])
self.c["MDR"]=self.c["TOS"]
self.wr()
elif opcode==ijvm["IOR"]:
@ -94,7 +94,7 @@ class Microprogram:
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["TOS"]=(self.c["MDR"] | self.c["H"])
self.c["MDR"]=self.c["TOS"]
self.wr()
elif opcode==ijvm["SWAP"]:
@ -107,6 +107,34 @@ class Microprogram:
self.c["MAR"]=self.c["SP"]-1
self.wr()
self.c["TOS"]=self.c["H"]
elif opcode==ijvm["ILOAD"]:
self.fetch();self.c["PC"]+=1 # Fetch local variable to push onto the stack
self.c["H"]=self.c["LV"]
self.c["MAR"]=self.c["MBRU"]+self.c["H"]
self.rd()
self.c["SP"]+=1
self.c["MAR"]=self.c["SP"]
self.wr()
self.c["TOS"]=self.c["MDR"]
elif opcode==ijvm["ISTORE"]:
self.fetch();self.c["PC"]+=1 # Fetch local variable offset where to store
self.c["H"]=self.c["LV"]
self.c["MAR"]=self.c["MBRU"]+self.c["H"]
self.c["MDR"]=self.c["TOS"]
self.wr()
self.c["SP"]-=1
self.c["MAR"]=self.c["SP"]
self.rd()
self.c["TOS"]=self.c["MDR"]
elif opcode==ijvm["IINC"]:
self.fetch();self.c["PC"]+=1 # Fetch local variable offset to inc
self.c["H"]=self.c["LV"]
self.c["MAR"]=self.c["MBRU"]+self.c["H"]
self.rd()
self.fetch();self.c["PC"]+=1 # Fetch inc value
self.c["H"]=self.c["MDR"]
self.c["MDR"]=self.c["MBR"]+self.c["H"]
self.wr()
elif opcode==ijvm["OUT"]:
self.fetch();self.c["PC"]+=1 # Fetch byte to push in MBR
print(str(chr(self.c["MBR"])),end="")