src/cpu/FuncUnit.py

# Copyright (c) 2010, 2017-2018 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder.  You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Copyright (c) 2006-2007 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Kevin Lim

from m5.SimObject import SimObject
from m5.params import *

class OpClass(Enum):
    vals = ['No_OpClass', 'IntAlu', 'IntMult', 'IntDiv', 'FloatAdd',
            'FloatCmp', 'FloatCvt', 'FloatMult', 'FloatMultAcc', 'FloatDiv',
            'FloatMisc', 'FloatSqrt',
            'SimdAdd', 'SimdAddAcc', 'SimdAlu', 'SimdCmp', 'SimdCvt',
            'SimdMisc', 'SimdMult', 'SimdMultAcc', 'SimdShift', 'SimdShiftAcc',
            'SimdDiv', 'SimdSqrt', 'SimdFloatAdd', 'SimdFloatAlu',
            'SimdFloatCmp', 'SimdFloatCvt', 'SimdFloatDiv', 'SimdFloatMisc',
            'SimdFloatMult', 'SimdFloatMultAcc', 'SimdFloatSqrt',
            'SimdReduceAdd', 'SimdReduceAlu', 'SimdReduceCmp',
            'SimdFloatReduceAdd', 'SimdFloatReduceCmp',
            'SimdAes', 'SimdAesMix', 'SimdSha1Hash', 'SimdSha1Hash2',
            'SimdSha256Hash', 'SimdSha256Hash2', 'SimdShaSigma2',
            'SimdShaSigma3',
            'SimdPredAlu',
            'MemRead', 'MemWrite', 'FloatMemRead', 'FloatMemWrite',
            'IprAccess', 'InstPrefetch']

class OpDesc(SimObject):
    type = 'OpDesc'
    cxx_header = "cpu/func_unit.hh"
    opClass = Param.OpClass("type of operation")
    opLat = Param.Cycles(1, "cycles until result is available")
    pipelined = Param.Bool(True, "set to true when the functional unit for"
        "this op is fully pipelined. False means not pipelined at all.")

class FUDesc(SimObject):
    type = 'FUDesc'
    cxx_header = "cpu/func_unit.hh"
    count = Param.Int("number of these FU's available")
    opList = VectorParam.OpDesc("operation classes for this FU type")