Greek software Designer Video Tutorial-3.1 process (Part III) SD

The pre-trend diagram is the topology diagram mentioned in the data structure. Nodes have a succession relationship, and nodes of the same level can run concurrently. P1 is the start node, and P9 is the end node.

P1->P4, only when the P1 run is complete P4 can start execution. There is this pre-relationship between them. After P2 and P3 run, P5 can run.

First calculate multiplication after calculate plus minus, so first calculate b*3 and x*9.b*3 result then divide x. We can use some signals to express these relationships.

Z1 is the intermediate result. The Z2 is also the intermediate result. S1-S5 five operations. Five operations have a certain sequence of execution. The order of execution can be expressed by a forward graph.

Part of the composition of the principle of the operation of the assembly line. Any instruction, each instruction must be taken, analyzed and executed in three steps. This is one of the lines. Using a pre-trend diagram can also describe a pipeline execution process.

Draw the assembly line into a pre-trend diagram. Find a restrictive relationship. Which part of the operation is finished the other part is ready to execute. Turn each step into an intuitive mode of operation.

Greek software Designer Video Tutorial-3.1 process (Part III) SD