import struct
import time

bitWidth = 32
startTime = time.time()

with open('isEven.bin', 'wb') as file:
   
    file.write(b"\x31\xC0")                     # XOR EAX, EAX

    for i in range(2**bitWidth):
        print(f"[{round(time.time() - startTime, 1)}s elapsed] status: {i}/{2**bitWidth} ({2**bitWidth - i} left)              ", end='\r')

        ib = struct.pack("<I", i)               # Encode i as 32 bit little endian integer

        file.write(b"\x81\xF9" + ib)            # CMP ECX, i

        if i%2 == 0:
            file.write(b"\x75\x03")             # JNE +3
            file.write(b"\xFF\xC0")             # INC EAX
            file.write(b"\xC3")                 # RET
        else:
            file.write(b"\x75\x01")             # JNE +1
            file.write(b"\xC3")                 # RET

    file.write(b"\xC3")                         # Fallback RET

print()
print(f"took: {round(time.time() - startTime, 8)}s")