def sdiv_(self, global_state):
s0, s1 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(global_state.mstate)
if s1 == 0:
global_state.mstate.stack.append(BitVecVal(0, 256))
else:
global_state.mstate.stack.append(s0 / s1)
return [global_state]
def div_(self, global_state):
op0, op1 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(global_state.mstate)
if op1 == 0:
global_state.mstate.stack.append(BitVecVal(0, 256))
else:
global_state.mstate.stack.append(UDiv(op0, op1))
return [global_state]
def exp_(self, global_state):
state = global_state.mstate
base, exponent = util.pop_bitvec(state), util.pop_bitvec(state)
if (type(base) != BitVecNumRef) or (type(exponent) != BitVecNumRef):
state.stack.append(BitVec("(" + str(simplify(base)) + ")**(" + str(simplify(exponent)) + ")", 256))
else:
state.stack.append(pow(base.as_long(), exponent.as_long(), 2**256))
return [global_state]
def exp_(self, global_state):
state = global_state.mstate
# we only implement 2 ** x
base, exponent = util.pop_bitvec(state), util.pop_bitvec(state)
if (type(base) != BitVecNumRef) or (type(exponent) != BitVecNumRef):
state.stack.append(BitVec("(" + str(simplify(base)) + ")^(" + str(simplify(exponent)) + ")", 256))
elif base.as_long() == 2:
if exponent.as_long() == 0:
state.stack.append(BitVecVal(1, 256))
else:
state.stack.append(base << (exponent - 1))
else:
state.stack.append(base)
return [global_state]
def sgt_(self, global_state):
state = global_state.mstate
exp = util.pop_bitvec(state) > util.pop_bitvec(state)
state.stack.append(exp)
return [global_state]
def gt_(self, global_state):
state = global_state.mstate
exp = UGT(util.pop_bitvec(state), util.pop_bitvec(state))
state.stack.append(exp)
return [global_state]
def mulmod_(self, global_state):
s0, s1, s2 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(
global_state.mstate), util.pop_bitvec(global_state.mstate)
global_state.mstate.stack.append((s0 * s1) % s2 if s2 else 0)
def addmod_(self, global_state):
s0, s1, s2 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(
global_state.mstate), util.pop_bitvec(global_state.mstate)
global_state.mstate.stack.append((s0 + s1) % s2)
return [global_state]
def smod_(self, global_state):
s0, s1 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(
global_state.mstate)
global_state.mstate.stack.append(0 if s1 == 0 else s0 % s1)
return [global_state]
def sdiv_(self, global_state):
s0, s1 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(
global_state.mstate)
global_state.mstate.stack.append(s0 / s1)
return [global_state]
def div_(self, global_state):
global_state.mstate.stack.append(
UDiv(util.pop_bitvec(global_state.mstate),
util.pop_bitvec(global_state.mstate)))
return [global_state]
def mul_(self, global_state):
global_state.mstate.stack.append(
(helper.pop_bitvec(global_state.mstate) *
helper.pop_bitvec(global_state.mstate)))
return [global_state]
def mulmod_(self, global_state):
s0, s1, s2 = util.pop_bitvec(global_state.mstate), util.pop_bitvec(global_state.mstate), util.pop_bitvec(
global_state.mstate)
global_state.mstate.stack.append(URem(URem(s0, s2) * URem(s1, s2), s2))
return [global_state]
