src/soc/scoreboard/reg_select.py

   1 from nmigen import Elaboratable, Module, Signal, Array
   2
   3
   4 class Reg_Rsv(Elaboratable):
   5     """ these are allocated per-Register (vertically),
   6         and are each of length fu_count
   7     """
   8     def __init__(self, fu_count, n_src):
   9         self.n_src = n_src
  10         self.fu_count = fu_count
  11         self.dest_rsel_i = Signal(fu_count, reset_less=True)
  12         self.src_rsel_i = Array(Signal(fu_count, name="src_rsel_i",
  13                                        reset_less=True) \
  14                                 for i in range(n_src))
  15         self.dest_rsel_o = Signal(reset_less=True)
  16         self.src_rsel_o = Signal(n_src, reset_less=True)
  17
  18     def elaborate(self, platform):
  19         m = Module()
  20         m.d.comb += self.dest_rsel_o.eq(self.dest_rsel_i.bool())
  21         for i in range(self.n_src):
  22             m.d.comb += self.src_rsel_o[i].eq(self.src_rsel_i[i].bool())
  23         return m
  24