src/soc/fu/alu/pipeline.py

   1 from nmutil.singlepipe import ControlBase
   2 from nmutil.pipemodbase import PipeModBaseChain
   3 from soc.fu.alu.input_stage import ALUInputStage
   4 from soc.fu.alu.main_stage import ALUMainStage
   5 from soc.fu.alu.output_stage import ALUOutputStage
   6
   7 class ALUStages(PipeModBaseChain):
   8     def get_chain(self):
   9         inp = ALUInputStage(self.pspec)
  10         main = ALUMainStage(self.pspec)
  11         return [inp, main]
  12
  13
  14 class ALUStageEnd(PipeModBaseChain):
  15     def get_chain(self):
  16         out = ALUOutputStage(self.pspec)
  17         return [out]
  18
  19
  20 class ALUBasePipe(ControlBase):
  21     def __init__(self, pspec):
  22         ControlBase.__init__(self)
  23         self.pspec = pspec
  24         self.pipe1 = ALUStages(pspec)
  25         self.pipe2 = ALUStageEnd(pspec)
  26         self._eqs = self.connect([self.pipe1, self.pipe2])
  27
  28     def elaborate(self, platform):
  29         m = ControlBase.elaborate(self, platform)
  30         m.submodules.pipe1 = self.pipe1
  31         m.submodules.pipe2 = self.pipe2
  32         m.d.comb += self._eqs
  33         return m