Pipeline Block

The PipeStream block orchestrates the first level of sub-blocks or CCEs as pipeline stages. At each stage, Kathryn automatically synchronizes execution with its preceding and succeeding stages. For example, if the first stage has completed execution at line 5 while the second stage has not yet completed execution at line 13, the first stage will not re-execute in that cycle. However, once line 13 of the second stage completes at cycle t, the first stage is allowed to complete the operation at line 5 in cycle t + 1.

• pipStream.cpp

  void flow() override{
        pipStream{
            /// stage 1
            par{
                a <<= a * 2; b <<= b * 2;
            }
            /// stage 2
            seq{
                par{
                    sqrtInt(a, r1);
                    sqrtInt(b, r2);
                }
                par{ res2 <<= r1 * r2;}
            }
            /// stage 3
            par{ res3 <<= res2 * 3; }
            /// stage 4
            res4 <<= res3 *4
   
        }
  }

• The state-machine will be like this