mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
88 lines
1.6 KiB
Python
88 lines
1.6 KiB
Python
from z3 import BitVecVal, BV2Int, If, LShR, UDiv, ULT, UGT, URem, ZeroExt, Extract
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def ADD(x, y):
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return x + y
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def MUL(x, y):
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return x * y
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def SUB(x, y):
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return x - y
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def DIV(x, y):
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return If(y == 0, 0, UDiv(x, y))
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def SDIV(x, y):
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return If(y == 0, 0, x / y)
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def MOD(x, y):
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return If(y == 0, 0, URem(x, y))
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def MULMOD(x, y, m):
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return If(m == 0, 0, Extract(x.size() - 1, 0, URem(ZeroExt(x.size(), x) * ZeroExt(x.size(), y), ZeroExt(m.size(), m))))
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def ADDMOD(x, y, m):
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return If(m == 0, 0, Extract(x.size() - 1, 0, URem(ZeroExt(1, x) + ZeroExt(1, y), ZeroExt(1, m))))
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def SMOD(x, y):
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return If(y == 0, 0, x % y)
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def LT(x, y):
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return If(ULT(x, y), BitVecVal(1, x.size()), BitVecVal(0, x.size()))
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def GT(x, y):
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return If(UGT(x, y), BitVecVal(1, x.size()), BitVecVal(0, x.size()))
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def SLT(x, y):
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return If(x < y, BitVecVal(1, x.size()), BitVecVal(0, x.size()))
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def SGT(x, y):
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return If(x > y, BitVecVal(1, x.size()), BitVecVal(0, x.size()))
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def EQ(x, y):
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return If(x == y, BitVecVal(1, x.size()), BitVecVal(0, x.size()))
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def ISZERO(x):
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return If(x == 0, BitVecVal(1, x.size()), BitVecVal(0, x.size()))
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def AND(x, y):
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return x & y
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def OR(x, y):
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return x | y
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def NOT(x):
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return ~(x)
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def SHL(x, y):
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return y << x
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def SHR(x, y):
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return LShR(y, x)
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def SAR(x, y):
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return y >> x
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def BYTE(i, x):
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bit = (i + 1) * 8
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return If(
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UGT(i, x.size() / 8 - 1),
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BitVecVal(0, x.size()),
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(LShR(x, (x.size() - bit))) & 0xff
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)
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def SIGNEXTEND(i, x):
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bitBV = i * 8 + 7
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bitInt = BV2Int(i) * 8 + 7
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test = BitVecVal(1, x.size()) << bitBV
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mask = test - 1
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return If(
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bitInt >= x.size(),
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x,
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If(
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(x & test) == 0,
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x & mask,
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x | ~mask
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)
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)
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