src/nmutil/extend.py

   1 from nmigen import Repl, Cat, Const
   2
   3
   4 def exts(exts_data, width, fullwidth):
   5     exts_data = exts_data[0:width]
   6     topbit = exts_data[-1]
   7     signbits = Repl(topbit, fullwidth-width)
   8     return Cat(exts_data, signbits)
   9
  10
  11 def extz(exts_data, width, fullwidth):
  12     exts_data = exts_data[0:width]
  13     topbit = Const(0)
  14     signbits = Repl(topbit, fullwidth-width)
  15     return Cat(exts_data, signbits)
  16
  17