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17 lines
343 B
Python
17 lines
343 B
Python
from rule import Rule
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from opcodes import *
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from util import *
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"""
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Checking conversion of exp(-1, X) to sub(isZero(and(X, 1)), and(X, 1))
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"""
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rule = Rule()
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n_bits = 256
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X = BitVec('X', n_bits)
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exp_neg_one = If(MOD(X, 2) == 0, BitVecVal(1, n_bits), BVUnsignedMax(n_bits, n_bits))
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rule.check(SUB(ISZERO(AND(X, 1)), AND(X, 1)), exp_neg_one)
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