passes/pmgen/ice40_wrapcarry.pmg

   1 pattern ice40_wrapcarry
   2
   3 match carry
   4         select carry->type.in(\SB_CARRY)
   5 endmatch
   6
   7 match lut
   8         select lut->type.in(\SB_LUT4)
   9         index <SigSpec> port(lut, \I1) === port(carry, \I0)
  10         index <SigSpec> port(lut, \I2) === port(carry, \I1)
  11 endmatch
  12
  13 code
  14         accept;
  15 endcode