Facilitating press operation in abutted-pin hierarchical physical design
View Patent ↗An abutted-pin hierarchical physical design process is described. The abutted-pin hierarchical physical design provides solutions to the problems of the traditional hierarchical physical design and provides additional advantages and benefits. In particular, the abutted-pin hierarchical physical design does not have channels. Moreover, in the abutted-pin hierarchical physical design, components of the top-level are merged into the block-level so that the top-level netlist is reduced significantly.
1. A method of pressing a top-level object into one or more blocks of a physical design, comprising:
a) performing a shape operation to identify a portion of said top-level object that is within a boundary of a particular block, wherein said top-level object includes a plurality of properties, and wherein said shape operation preserves said properties associated with said portion of said top-level object; and
b) moving said portion of said top-level object and said properties associated with said portion of said top-level object from a top-level netlist to a block-level netlist of said particular block so that said top-level object changes from a flattened state to a hierarchical state.
2. A method as recited in claim 1 wherein said physical design is an abutted-pin hierarchical physical design.
3. A method as recited in claim 2 wherein said physical design includes a top-level physical design.
4. A method as recited in claim 2 wherein said physical design includes a block-level physical design.
5. A method as recited in claim 1 wherein said top-level object is a timing component.
6. A method as recited in claim 1 wherein said top-level object is a clock distribution wiring.
7. A method as recited in claim 1 wherein said top-level object is a power distribution wiring.
8. A method as recited in claim 1 wherein said top-level object is a routing metal.
9. A method as recited in claim 1 wherein said shape operation is an AND operation.
10. A method as recited in claim 1 wherein said properties are stored in a database.
11. A computer-readable medium comprising computer-executable instructions stored therein for performing a method of pressing a top-level object into one or more blocks of a physical design, said method comprising:
a) performing a shape operation to identify a portion of said top-level object that is within a boundary of a particular block, wherein said top-level object includes a plurality of properties, and wherein said shape operation preserves said properties associated with said portion of said top-level object; and
b) moving said portion of said top-level object and said properties associated with said portion of said top-level object from a top-level netlist to a block-level netlist of said particular block so that said top-level object changes from a flattened state to a hierarchical state.
12. A computer-readable medium as recited in claim 11 wherein said physical design is an abutted-pin hierarchical physical design.
13. A computer-readable medium as recited in claim 12 wherein said physical design includes a top-level physical design.
14. A computer-readable medium as recited in claim 12 wherein said physical design includes a block-level physical design.
15. A computer-readable medium as recited in claim 11 wherein said top-level object is a timing component.
16. A computer-readable medium as recited in claim 11 wherein said top-level object is a clock distribution wiring.
17. A computer-readable medium as recited in claim 11 wherein said top-level object is a power distribution wiring.
18. A computer-readable medium as recited in claim 11 wherein said top-level object is a routing metal.
19. A computer-readable medium as recited in claim 11 wherein said shape operation is an AND operation.
20. A computer-readable medium as recited in claim 11 wherein said properties are stored in a database.
21. A method of pressing a top-level object into one or more blocks of a physical design, comprising:
a) identifying a portion of said top-level object that is within a boundary of a particular block;
b) moving said portion of said top-level object from a top-level netlist to a block-level netlist of said particular block so that said top-level object changes from a flattened state to a hierarchical state;
c) if said top-level object includes a press property, performing a block-level placement for said particular block such that a block-level physical location of said portion of said top-level object is substantially equivalent to a top-level physical location of said portion of said top-level object; and
d) if said top-level object does not include a press property, performing said block-level placement for said particular block without regard to said top-level physical location of said portion of said top-level object.
22. A method as recited in claim 21 wherein said physical design is an abutted-pin hierarchical physical design.
23. A method as recited in claim 22 wherein said physical design includes a top-level physical design.
24. A method as recited in claim 22 wherein said physical design includes a block-level physical design.
25. A method as recited in claim 21 wherein said top-level object is a timing component.
26. A method as recited in claim 21 wherein said top-level object is a clock distribution wiring.
27. A method as recited in claim 21 wherein said top-level object is a power distribution wiring.
28. A method as recited in claim 21 wherein said top-level object is a routing metal.
29. A method as recited in claim 21 wherein said top-level object is a ground distribution wiring.
30. A method as recited in claim 21 wherein said press property is stored in a database.
31. A computer-readable medium comprising computer-executable instructions stored therein for performing a method of pressing a top-level object into one or more blocks of a physical design, said method comprising:
a) identifying a portion of said top-level object that is within a boundary of a particular block;
b) moving said portion of said top-level object from a top-level netlist to a block-level netlist of said particular block so that said top-level object changes from a flattened state to a hierarchical state;
c) if said top-level object includes a press property, performing a block-level placement for said particular block such that a block-level physical location of said portion of said top-level object is substantially equivalent to a top-level physical location of said portion of said top-level object; and
d) if said top-level object does not include a press property, performing said block-level placement for said particular block without regard to said top-level physical location of said portion of said top-level object.
32. A computer-readable medium as recited in claim 31 wherein said physical design is an abutted-pin hierarchical physical design.
33. A computer-readable medium as recited in claim 32 wherein said physical design includes a top-level physical design.
34. A computer-readable medium as recited in claim 32 wherein said physical design includes a block-level physical design.
35. A computer-readable medium as recited in claim 31 wherein said top-level object is a timing component.
36. A computer-readable medium as recited in claim 31 wherein said top-level object is a clock distribution wiring.
37. A computer-readable medium as recited in claim 31 wherein said top-level object is a power distribution wiring.
38. A computer-readable medium as recited in claim 31 wherein said top-level object is a routing metal.
39. A computer-readable medium as recited in claim 31 wherein said top-level object is a ground distribution wiring.
40. A computer-readable medium as recited in claim 31 wherein said press property is stored in a database.