Source code for pacman.model.resources.constant_sdram
# Copyright (c) 2017 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from spinn_utilities.overrides import overrides
from .abstract_sdram import AbstractSDRAM
[docs]class ConstantSDRAM(AbstractSDRAM):
"""
Represents an amount of SDRAM used on a chip in the machine.
This is used when the amount of SDRAM needed is not effected by runtime
"""
__slots__ = [
# The amount of SDRAM in bytes
"_sdram"
]
def __init__(self, sdram):
"""
:param sdram: The amount of SDRAM in bytes
:type sdram: int or ~numpy.int64
"""
self._sdram = int(sdram)
[docs] @overrides(AbstractSDRAM.get_total_sdram)
def get_total_sdram(self, n_timesteps): # @UnusedVariable
return self._sdram
@property
@overrides(AbstractSDRAM.fixed)
def fixed(self):
return self._sdram
@property
@overrides(AbstractSDRAM.per_timestep)
def per_timestep(self):
return 0
def __add__(self, other):
if isinstance(other, ConstantSDRAM):
return ConstantSDRAM(
self._sdram + other.fixed)
else:
# The other is more complex so delegate to it
return other.__add__(self)
def __sub__(self, other):
if isinstance(other, ConstantSDRAM):
return ConstantSDRAM(
self._sdram - other.fixed)
else:
# The other is more complex so delegate to it
return other.sub_from(self)
[docs] @overrides(AbstractSDRAM.sub_from)
def sub_from(self, other):
if isinstance(other, ConstantSDRAM):
return ConstantSDRAM(
other.fixed - self._sdram)
else:
# The other is more complex so delegate to it
return other - self
[docs] @overrides(AbstractSDRAM.report)
def report(self, timesteps, indent="", preamble="", target=None):
print(indent, preamble, f"Constant {self._sdram} bytes", file=target)