src/nmutil/extend.py

   1 """
   2     This work is funded through NLnet under Grant 2019-02-012
   3
   4     License: LGPLv3+
   5
   6
   7 """
   8 from nmigen import Repl, Cat, Const
   9
  10
  11 def exts(exts_data, width, fullwidth):
  12     exts_data = exts_data[0:width]
  13     topbit = exts_data[-1]
  14     signbits = Repl(topbit, fullwidth-width)
  15     return Cat(exts_data, signbits)
  16
  17
  18 def extz(exts_data, width, fullwidth):
  19     exts_data = exts_data[0:width]
  20     topbit = Const(0)
  21     signbits = Repl(topbit, fullwidth-width)
  22     return Cat(exts_data, signbits)
  23
  24