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eth/vm/logic/arithmetic: handle exp(X,0) == 1. #1217

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Aug 28, 2018
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eth/vm/logic/arithmetic: handle exp(X,0) == 1. #1217

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08674f6
eth/vm/logic/arithmetic: handle exp(X,0) == 1.
veox Aug 28, 2018
e7b0af9
tests/opcodes: exponentiation: 0^0==1, 0^1==0.
veox Aug 28, 2018
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4 changes: 3 additions & 1 deletion eth/vm/logic/arithmetic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -147,7 +147,9 @@ def exp(computation, gas_per_byte):
bit_size = exponent.bit_length()
byte_size = ceil8(bit_size) // 8

if base == 0:
if exponent == 0:
result = 1
elif base == 0:
result = 0
else:
result = pow(base, exponent, constants.UINT_256_CEILING)
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