def _get_next(self):
"""Generate and return the next RNG value."""
val_int = xmath.int(DeferredExpression(self.var_name))
val = ((val_int * 58321 + 11113)) % 65535
self.__set__(self, val)
container = inspect.currentframe().f_back.f_locals['obj']
self.bsca.deferred_write(container)
def __init__(self, val=None, name="var"):
"""Initialize base class features."""
super(Variable, self).__init__()
self.fallback_name = name
self.base_class = Variable
if val is None:
raise XenticaException("Variable should have an initial value.")
self._init_val = DeferredExpression(str(val))
def uniform(self):
"""Get a random value from the uniform distribution."""
return xmath.float(DeferredExpression(self.var_name)) / 65535
def min(*args):
"""Calculate the minimum over list of args."""
expr = str(args[0])
for arg in args[1:]:
expr = "(({a}) < ({b})) ? ({a}) : ({b})".format(a=expr, b=arg)
return DeferredExpression("(%s)" % expr)
def exp(val):
"""Calculate exponent."""
return DeferredExpression("(exp(%s))" % val)
def popc(val):
"""Count the number of bits that are set to '1' in a 32 bit integer."""
return DeferredExpression("(__popc(%s))" % val)
def int(val):
"""Cast a value to int."""
return DeferredExpression("((unsigned int) (%s))" % val)
def float(val):
"""Cast a value to float."""
return DeferredExpression("((float) (%s))" % val)
def __get__(self, obj, objtype):
"""Implement custom logic when param is get as class descriptor."""
self._declare_once()
if self._interactive:
return DeferredExpression(self._name)
return self._value
