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# Authors: Kevin Lim

from m5.SimObject import SimObject
from m5.defines import buildEnv
from m5.params import *

from m5.objects.FuncUnit import *

class IntALU(FUDesc):
    opList = [ OpDesc(opClass='IntAlu') ]
    count = 6

class IntMultDiv(FUDesc):
    opList = [ OpDesc(opClass='IntMult', opLat=3),
               OpDesc(opClass='IntDiv', opLat=20, pipelined=False) ]

    # DIV and IDIV instructions in x86 are implemented using a loop which
    # issues division microops.  The latency of these microops should really be
    # one (or a small number) cycle each since each of these computes one bit
    # of the quotient.
    if buildEnv['TARGET_ISA'] in ('x86'):
        opList[1].opLat=1

    count=2

class FP_ALU(FUDesc):
    opList = [ OpDesc(opClass='FloatAdd', opLat=2),
               OpDesc(opClass='FloatCmp', opLat=2),
               OpDesc(opClass='FloatCvt', opLat=2) ]
    count = 4

class FP_MultDiv(FUDesc):
    opList = [ OpDesc(opClass='FloatMult', opLat=4),
               OpDesc(opClass='FloatMultAcc', opLat=5),
               OpDesc(opClass='FloatMisc', opLat=3),
               OpDesc(opClass='FloatDiv', opLat=12, pipelined=False),
               OpDesc(opClass='FloatSqrt', opLat=24, pipelined=False) ]
    count = 2

class SIMD_Unit(FUDesc):
    opList = [ OpDesc(opClass='SimdAdd'),
               OpDesc(opClass='SimdAddAcc'),
               OpDesc(opClass='SimdAlu'),
               OpDesc(opClass='SimdCmp'),
               OpDesc(opClass='SimdCvt'),
               OpDesc(opClass='SimdMisc'),
               OpDesc(opClass='SimdMult'),
               OpDesc(opClass='SimdMultAcc'),
               OpDesc(opClass='SimdShift'),
               OpDesc(opClass='SimdShiftAcc'),
               OpDesc(opClass='SimdSqrt'),
               OpDesc(opClass='SimdFloatAdd'),
               OpDesc(opClass='SimdFloatAlu'),
               OpDesc(opClass='SimdFloatCmp'),
               OpDesc(opClass='SimdFloatCvt'),
               OpDesc(opClass='SimdFloatDiv'),
               OpDesc(opClass='SimdFloatMisc'),
               OpDesc(opClass='SimdFloatMult'),
               OpDesc(opClass='SimdFloatMultAcc'),
               OpDesc(opClass='SimdFloatSqrt') ]
    count = 4

class ReadPort(FUDesc):
    opList = [ OpDesc(opClass='MemRead'),
               OpDesc(opClass='FloatMemRead') ]
    count = 0

class WritePort(FUDesc):
    opList = [ OpDesc(opClass='MemWrite'),
               OpDesc(opClass='FloatMemWrite') ]
    count = 0

class RdWrPort(FUDesc):
    opList = [ OpDesc(opClass='MemRead'), OpDesc(opClass='MemWrite'),
               OpDesc(opClass='FloatMemRead'), OpDesc(opClass='FloatMemWrite')]
    count = 4

class IprPort(FUDesc):
    opList = [ OpDesc(opClass='IprAccess', opLat = 3, pipelined = False) ]
    count = 1