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shiracamus/signed.py

Created January 30, 2024 08:10
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signed.py
def signed(value, bits=8):
return (value & ((sign := (1 << (bits - 1))) - 1)) - (value & sign)
print(signed(0x7f)) # 127
print(signed(0x80)) # -128
print(signed(0x81)) # -127
print(signed(0x7fff)) # -1
print(signed(0x7fff, 16)) # 32767
print(signed(0x8000, 16)) # -32768
print(signed(0x8001, 16)) # -32767
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