from nmigen import Module
from nmigen.cli import main, verilog
-from singlepipe import (ControlBase, UnbufferedPipeline, PassThroughStage)
+from singlepipe import (ControlBase, SimpleHandshake, PassThroughStage)
from multipipe import CombMuxOutPipe
from multipipe import PriorityCombMuxInPipe
from fpadd.specialcases import FPAddSpecialCasesDeNorm
from fpadd.addstages import FPAddAlignSingleAdd
+from concurrentunit import ReservationStations, num_bits
+
class FPADDBasePipe(ControlBase):
def __init__(self, width, id_wid):
self._eqs = self.connect([self.pipe1, self.pipe2, self.pipe3])
def elaborate(self, platform):
- m = Module()
+ m = ControlBase.elaborate(self, platform)
m.submodules.scnorm = self.pipe1
m.submodules.addalign = self.pipe2
m.submodules.normpack = self.pipe3
return m
-class FPADDInMuxPipe(PriorityCombMuxInPipe):
- def __init__(self, width, id_wid, num_rows):
- self.num_rows = num_rows
- def iospec(): return FPADDBaseData(width, id_wid)
- stage = PassThroughStage(iospec)
- PriorityCombMuxInPipe.__init__(self, stage, p_len=self.num_rows)
-
-
-class FPADDMuxOutPipe(CombMuxOutPipe):
- def __init__(self, width, id_wid, num_rows):
- self.num_rows = num_rows
- def iospec(): return FPPackData(width, id_wid)
- stage = PassThroughStage(iospec)
- CombMuxOutPipe.__init__(self, stage, n_len=self.num_rows)
-
-
-class FPADDMuxInOut:
+class FPADDMuxInOut(ReservationStations):
""" Reservation-Station version of FPADD pipeline.
* fan-in on inputs (an array of FPADDBaseData: a,b,mid)
Fan-in and Fan-out are combinatorial.
"""
- def __init__(self, width, id_wid, num_rows):
- self.num_rows = num_rows
- self.inpipe = FPADDInMuxPipe(width, id_wid, num_rows) # fan-in
- self.fpadd = FPADDBasePipe(width, id_wid) # add stage
- self.outpipe = FPADDMuxOutPipe(width, id_wid, num_rows) # fan-out
-
- self.p = self.inpipe.p # kinda annoying,
- self.n = self.outpipe.n # use pipe in/out as this class in/out
- self._ports = self.inpipe.ports() + self.outpipe.ports()
-
- def elaborate(self, platform):
- m = Module()
- m.submodules.inpipe = self.inpipe
- m.submodules.fpadd = self.fpadd
- m.submodules.outpipe = self.outpipe
-
- m.d.comb += self.inpipe.n.connect_to_next(self.fpadd.p)
- m.d.comb += self.fpadd.connect_to_next(self.outpipe)
-
- return m
-
- def ports(self):
- return self._ports
+ def __init__(self, width, num_rows):
+ self.width = width
+ self.id_wid = num_bits(width)
+ self.alu = FPADDBasePipe(width, self.id_wid)
+ ReservationStations.__init__(self, num_rows)
+ def i_specfn(self):
+ return FPADDBaseData(self.width, self.id_wid)
+ def o_specfn(self):
+ return FPPackData(self.width, self.id_wid)