def walk_bv_ashr(self, formula, args, **kwargs):
l,r = args
if l.is_bv_constant() and r.is_bv_constant():
sign = l.bv_signed_value() < 0
ret = self.walk_bv_lshr(self.manager.BVLShr(l, r), [l, r], **kwargs)
width = formula.bv_width()
if sign:
n = ret.bv_unsigned_value()
padlen = width
if width > r.bv_unsigned_value():
padlen = r.bv_unsigned_value()
for i in xrange(width-padlen, width):
n = set_bit(n, i, True)
ret = self.manager.BV(n, width)
return ret
return self.manager.BVAShr(l, r)
def walk_bv_ashr(self, formula, args, **kwargs):
l,r = args
if l.is_bv_constant() and r.is_bv_constant():
sign = l.bv_signed_value() < 0
ret = self.walk_bv_lshr(self.manager.BVLShr(l, r), [l, r], **kwargs)
width = formula.bv_width()
if sign:
n = ret.bv_unsigned_value()
padlen = width
if width > r.bv_unsigned_value():
padlen = r.bv_unsigned_value()
for i in xrange(width-padlen, width):
n = set_bit(n, i, True)
ret = self.manager.BV(n, width)
return ret
return self.manager.BVAShr(l, r)