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import sys
from string import Template
TWOWAY = {
"ir": "001",
"pm": "010",
"pc": "011",
"hr": "101",
"grx": "110",
}
# to bus: source
TB = TWOWAY | {
"ar": "100",
# "styrord": "111",
}
# from bus: destination
FB = TWOWAY | {
"asr": "111"
}
def compile(lines):
addr = 0
labels = {}
compiled = []
todo = []
for line in lines:
if not line:
# empty line, ignore
continue
if line.startswith(";"):
# comment
continue
if line.endswith(":"):
# label
labels[line.split(":")[0]] = addr
continue
if line.startswith("!"):
# inline
compiled.append(line[1:])
addr += 1
continue
for inst in line.split(", "):
alu = "0000"
tb = "000"
fb = "000"
s = "0"
p = "0"
lc = "00"
seq = "0000"
myadr = "0000000"
if "->" in inst:
# move a value
fr, to = inst.split("->")
# via bus
if fr in TB:
tb = TB[fr]
if to in FB:
fb = FB[to]
if "gr" in fr and len(fr) == 3:
tb = TB["grx"]
if "gr" in to and len(to) == 3:
fb = FB["grx"]
if to == "lc":
lc = "10"
# load alu
if to == "ar":
alu = "0001"
# alu addition
if "+" in fr:
if "+'" in fr:
# ignore flags
other = fr.split("+'")[1]
alu = "1000"
else:
other = fr.split("+")[1]
alu = "0100"
tb = TB[other]
# alu subtraction
if "-" in fr:
other = fr.split("-")[1]
tb = TB[other]
alu = "0101"
if "&" in fr:
other = fr.split("&")[1]
tb = TB[other]
alu = "0110"
if inst == "pc++":
p = "1"
if inst == "k1->upc":
seq = "0001"
if inst == "k2->upc":
seq = "0010"
if inst == "0->upc":
seq = "0011"
if inst == "halt":
seq = "1111"
if inst == "lc--":
lc = "01"
if inst == "lsr":
alu = "1101"
if "?" in inst:
cond, to = inst.split("? ")
if cond == "l=1":
seq = "1100"
else:
assert False
myadr = f"<{to}>"
if inst.startswith("b "):
seq = "0110" #TODO 0101?
myadr = "<{}>".format(inst.split("b ")[1])
compiled.append((inst, (alu, tb, fb, s, p, lc, seq, myadr)))
addr += 1
linked = []
for addr, line in enumerate(compiled):
if type(line) is str:
linked.append((addr, line))
continue
inst, (alu, tb, fb, s, p, lc, seq, myadr) = line
if myadr != "0000000":
for label, label_line in labels.items():
myadr = myadr.replace(f"<{label}>", str(bin(label_line)[2:]).zfill(7))
first = alu[0]
rest = alu[1:] + tb + fb + s + p + lc + seq + myadr
hs = "".join([f"{int(first):01x}"] + [f"{int(rest[i:i+4], 2):01x}" for i in range(0, len(rest), 4)])
linked.append((addr, hs))
if hs == "0000000":
todo.append(inst)
return ["{:02x}: {}".format(addr, line) for addr, line in linked], labels
"""
todo:
"""
print("todo")
print("\n".join(todo))
def write(prog, labels):
#with open("template.mia", "r") as f:
# template = Template(f.read())
ucode_pad = 0x80 - len(prog)
ucode = "\n".join(prog + [f"{len(prog)+n:02x}: 0000000" for n in range(ucode_pad)])
insts = [
"load",
"store",
"add",
"sub",
"and",
"lsr",
"bra",
"bne",
"halt",
"cmp",
"bge",
"beq",
]
inst_locations = "\n".join([f"{i:02x}: {labels[inst]:02x}" for i, inst in enumerate(insts)])
print("MyM:")
print(ucode)
print()
print("K1:")
print(inst_locations)
#print(template.safe_substitute(pm))
if __name__ == "__main__":
write(*compile([line.strip() for line in sys.stdin]))
|
