3.5 KiB
3.5 KiB
컴파일러작성
어셈블리 언어를 기계어 hex 파일로 변환한다.
변환 프로그램 구동
python asmtohex.py led.asm
변환프로그램
asmtohex.py 파일 이름으로 다음과 파이썬 언어로 작성한다.
import sys
from pathlib import Path
OPCODE = {
"NOP": 0x0,
"LOAD": 0x1,
"INC": 0x2,
"DEC": 0x3,
"JMP": 0x4,
"JZ": 0x5,
"JNZ": 0x6,
"LED_ON": 0x7,
"LED_OFF": 0x8,
"DELAY": 0x9,
}
def remove_comment(line):
return line.split(";")[0].strip()
def parse_number(text):
text = text.strip()
if text.lower().startswith("0x"):
return int(text, 16)
if text.lower().startswith("0b"):
return int(text, 2)
return int(text, 10)
def assemble(asm_text):
labels = {}
instructions = []
pc = 0
# 1차 패스: 라벨 주소 수집
for raw_line in asm_text.splitlines():
line = remove_comment(raw_line)
if not line:
continue
if line.endswith(":"):
label = line[:-1].strip()
if label in labels:
raise ValueError(f"중복 라벨: {label}")
labels[label] = pc
continue
if ":" in line:
label_part, inst_part = line.split(":", 1)
label = label_part.strip()
inst_line = inst_part.strip()
if label in labels:
raise ValueError(f"중복 라벨: {label}")
labels[label] = pc
if inst_line:
instructions.append(inst_line)
pc += 1
continue
instructions.append(line)
pc += 1
machine = []
# 2차 패스: 명령어 변환
for addr, line in enumerate(instructions):
parts = line.replace(",", " ").split()
if not parts:
continue
mnemonic = parts[0].upper()
if mnemonic not in OPCODE:
raise ValueError(f"{addr}: 알 수 없는 명령어: {mnemonic}")
opcode = OPCODE[mnemonic]
operand = 0
if len(parts) >= 2:
arg = parts[1]
if arg in labels:
operand = labels[arg]
else:
operand = parse_number(arg)
if operand < 0 or operand > 0x0FFF:
raise ValueError(f"{addr}: operand 범위 초과 0~4095: {operand}")
word = (opcode << 12) | (operand & 0x0FFF)
machine.append(word)
return machine, labels, instructions
def main():
if len(sys.argv) != 2:
print("사용법: python asmtohex.py led.asm")
sys.exit(1)
asm_path = Path(sys.argv[1])
if not asm_path.exists():
print(f"파일 없음: {asm_path}")
sys.exit(1)
hex_path = asm_path.with_suffix(".hex")
asm_text = asm_path.read_text(encoding="utf-8")
machine, labels, instructions = assemble(asm_text)
with hex_path.open("w", encoding="utf-8") as f:
for word in machine:
f.write(f"{word:04X}\n")
print("라벨:")
for name, addr in labels.items():
print(f" {name} = {addr}")
print()
print("기계어:")
for addr, word in enumerate(machine):
print(f" {addr:02d}: {word:04X} ; {instructions[addr]}")
print()
print(f"HEX 생성 완료: {hex_path}")
if __name__ == "__main__":
main()
