src/ieee754/fpfma/norm.py

   1 from nmutil.pipemodbase import PipeModBaseChain, PipeModBase
   2 from ieee754.fpcommon.postnormalise import FPNorm1Data
   3 from ieee754.fpcommon.roundz import FPRoundMod
   4 from ieee754.fpcommon.corrections import FPCorrectionsMod
   5 from ieee754.fpcommon.pack import FPPackMod
   6 from ieee754.fpfma.main_stage import FPFMAPostCalcData
   7 from nmigen.hdl.dsl import Module
   8
   9 from ieee754.fpfma.util import get_fpformat
  10
  11
  12 class FPFMANorm(PipeModBase):
  13     def __init__(self, pspec):
  14         super().__init__(pspec, "norm")
  15
  16     def ispec(self):
  17         return FPFMAPostCalcData(self.pspec)
  18
  19     def ospec(self):
  20         return FPNorm1Data(self.pspec)
  21
  22     def elaborate(self, platform):
  23         m = Module()
  24         fpf = get_fpformat(self.pspec)
  25         assert fpf.has_sign
  26         inp = self.i
  27         out = self.o
  28         raise NotImplementedError  # FIXME: finish
  29         m.d.comb += [
  30             out.roundz.eq(),
  31             out.z.eq(),
  32             out.out_do_z.eq(),
  33             out.oz.eq(),
  34             out.ctx.eq(),
  35             out.rm.eq(),
  36         ]
  37         return m
  38
  39
  40 class FPFMANormToPack(PipeModBaseChain):
  41     def __init__(self, pspec):
  42         super().__init__(pspec)
  43
  44     def get_chain(self):
  45         """ gets chain of modules
  46         """
  47         nmod = FPFMANorm(self.pspec)
  48         rmod = FPRoundMod(self.pspec)
  49         cmod = FPCorrectionsMod(self.pspec)
  50         pmod = FPPackMod(self.pspec)
  51         return [nmod, rmod, cmod, pmod]