mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
28 lines
738 B
Python
28 lines
738 B
Python
from z3 import BitVecVal, Concat, If
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def BVUnsignedUpCast(x, n_bits):
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assert x.size() <= n_bits
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if x.size() < n_bits:
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return Concat(BitVecVal(0, n_bits - x.size()), x)
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else:
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return x
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def BVUnsignedMax(type_bits, n_bits):
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assert type_bits <= n_bits
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return BitVecVal((1 << type_bits) - 1, n_bits)
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def BVSignedUpCast(x, n_bits):
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assert x.size() <= n_bits
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if x.size() < n_bits:
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return Concat(If(x < 0, BitVecVal(-1, n_bits - x.size()), BitVecVal(0, n_bits - x.size())), x)
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else:
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return x
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def BVSignedMax(type_bits, n_bits):
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assert type_bits <= n_bits
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return BitVecVal((1 << (type_bits - 1)) - 1, n_bits)
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def BVSignedMin(type_bits, n_bits):
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assert type_bits <= n_bits
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return BitVecVal(-(1 << (type_bits - 1)), n_bits)
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