def direc(line, addressCounter):
tokens=line.split()
if(len(tokens)>0):
for t_indx in range(len(tokens)):
token = tokens[t_indx]
if(token[0]=="."):
if(token[1:]=="text"):
symtab_append("address:"+str(addressCounter)+"\tname:text\ttype:label\n") #appending to symbol table
elif(token[1:]=="data"):
symtab_append("address:"+str(addressCounter)+"\tname:data\ttype:label\n")
elif(token[1:]=="word"):
symtab_update()
value = tokens[t_indx+1]
v_bin = "0000000"+bin(int(value))[2:]
v_bin = v_bin[-8:]
mem_mod.update_memory(addressCounter,v_bin)
addressCounter+=4
elif(token[1:]=="doubleword"):
symtab_update()
value = tokens[t_indx+1]
v_bin = "0000000"+bin(int(value))[2:]
v_bin = v_bin[-8:]
mem_mod.update_memory(addressCounter+4,v_bin)
addressCounter+=8
else:
print("Unrecognized assembler directive!")
return addressCounter
def stb(line):
rs = int(line[6:11], 2)
ra = int(line[11:16], 2)
ds = int(line[16:30], 2)
t1 = int(mem_man.read_register(ra), 2)
ea = ds + t1
data = mem_man.read_register(rs)
mem_man.update_memory(ea, data[-8:])
def stw(line):
rs = int(line[6:11], 2)
ra = int(line[11:16], 2)
ds = int(line[16:30], 2)
t1 = int(mem_man.read_register(ra), 2)
ea = ds + t1
data = mem_man.read_register(rs)
mem_man.update_memory(ea, data[-8:])
mem_man.update_memory(ea + 1, data[-16:-8])
mem_man.update_memory(ea + 2, data[-24:-16])
mem_man.update_memory(ea + 3, data[-32:-24])
def std(line):
rs = int(line[6:11], 2)
ra = int(line[11:16], 2)
ds = int(line[16:30], 2)
t1 = int(mem_man.read_register(ra), 2)
disp = ds * 4
ea = disp + t1
data = mem_man.read_register(rs)
mem_man.update_memory(ea, data[-8:])
mem_man.update_memory(ea + 1, data[-16:-8])
mem_man.update_memory(ea + 2, data[-24:-16])
mem_man.update_memory(ea + 3, data[-32:-24])
mem_man.update_memory(ea + 4, data[-40:-32])
mem_man.update_memory(ea + 5, data[-48:-40])
mem_man.update_memory(ea + 6, data[-56:-48])
mem_man.update_memory(ea + 7, data[-64:-56])