starrc的skip_cells是什么意思？

hbbdlx · 发表于 2012-7-24 10:42:20

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我在咱们论坛上下载了个starrc的模版，请问里边的SKIP_CELLS是什么意思？应该怎么设置？

damonzhao · 发表于 2012-7-24 11:32:10

找个user guide看看说明，体会下，然后回来讨论
总不能别人说啥就信啥吧，自己找到官方资料，理解下，和别人讨论下，印证下

yiyeyo · 发表于 2012-7-24 13:49:14

SKIP_CELLS
Creates a white-space-delimited list of cells for StarRC to skip during extraction.
Syntax
SKIP_CELLS: cell1 cell2 ... cellN
Arguments
Argument Description
cell1 cell2 ... cellN A list of cells to be skipped during extraction. Wildcard characters
are acceptable.
Default: *
Description
The SKIP_CELLS command creates a white-space-delimited list of cells for StarRC to skip
during extraction. This command may be specified multiple times in a single command file.
The asterisk (*), exclamation mark (!), and question mark (?) wildcard characters are
acceptable. Case sensitivity for selection purposes is determined by the value of the
CASE_SENSITIVE command, but the netlist always retains the case of the original input
database.
Skipped cells are typically cells with their own timing models, which can later be applied,
along with the StarRC parasitic netlist, to perform a timing analysis. Skipped cells should
have labeled, or otherwise annotated, pin shapes for proper parasitic netlisting.
The default for all extraction flows is to skip everything in the input database, so any macro
blocks without timing models must be negated from the list.