{"id":120103,"date":"2026-10-31T03:16:43","date_gmt":"2026-10-30T19:16:43","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/120103.html"},"modified":"2026-10-31T03:16:43","modified_gmt":"2026-10-30T19:16:43","slug":"sdc%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3%ef%bc%9a%e4%bd%bf%e7%94%a8all_fanin%e5%91%bd%e4%bb%a4%e8%bf%9b%e8%a1%8c%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/120103.html","title":{"rendered":"SDC\u547d\u4ee4\u8be6\u89e3\uff1a\u4f7f\u7528all_fanin\u547d\u4ee4\u8fdb\u884c\u67e5\u8be2"},"content":{"rendered":"

\u76f8\u5173\u9605\u8bfb<\/p>\n

SDC\u547d\u4ee4\u8be6\u89e3<\/span>https:\/\/blog.csdn.net\/weixin_45791458\/category_12931432.html<\/span><\/span><\/p>\n

\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0all_fanin\u547d\u4ee4\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u8f93\u5165\u7aef\u53e3\u3001\u5f15\u811a\u548c\u5355\u5143\u5bf9\u8c61\u96c6\u5408，\u5305\u542b\u6307\u5b9a\u5bf9\u8c61\u7684\u6247\u5165\u65f6\u5e8f\u8def\u5f84\u4e0a\u7684\u5bf9\u8c61，\u5173\u4e8e\u8bbe\u8ba1\u5bf9\u8c61\u548c\u96c6\u5408\u7684\u66f4\u8be6\u7ec6\u4ecb\u7ecd，\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u535a\u5ba2\u3002<\/p>\n

Synopsys：\u8bbe\u8ba1\u5bf9\u8c61<\/span>https:\/\/chenzhang.blog.csdn.net\/article\/details\/147015140?spm=1001.2014.3001.5502<\/span><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u672c\u6587\u9488\u5bf9Design\u00a0Compiler，\u4f46\u8be5\u547d\u4ee4\u540c\u6837\u5b58\u5728\u4e8ePrimeTime\u3001IC Compiler\u7b49\u5de5\u5177\u4e2d，\u5b83\u4eec\u5927\u81f4\u76f8\u540c，\u7565\u6709\u5dee\u522b\u3002all_fanin\u547d\u4ee4\u7684BNF\u8303\u5f0f（\u6709\u5173BNF\u8303\u5f0f，\u53ef\u4ee5\u53c2\u8003\u4ee5\u5f80\u6587\u7ae0）\u4e3a：<\/p>\n

all_fanin
\n -to sink_list
\n [-startpoints_only]
\n [-exclude_bboxes]
\n [-break_on_bboxes]
\n [-only_cells]
\n [-flat]
\n [-levels count]
\n [-trace_arcs arc_type]
\n [-continue_trace pin_types]
\n \/\/\u6ce8：\u8be5\u547d\u4ee4\u7684\u9009\u9879\u548c\u53c2\u6570\u987a\u5e8f\u4efb\u610f <\/p>\n

\u6307\u5b9a\u5bf9\u8c61<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 -to\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u4f5c\u4e3a\u5411\u524d\u904d\u5386\u8d77\u70b9\u7684\u5f15\u811a\u3001\u7aef\u53e3\u6216\u7ebf\u7f51（\u5176\u6548\u679c\u4e0e\u5217\u51fa\u8be5\u7ebf\u7f51\u7684\u9a71\u52a8\u5f15\u811a\u76f8\u540c），\u5bf9\u4e8e\u5217\u8868\u800c\u8a00，\u5982\u679c\u6709\u591a\u4e8e\u4e00\u4e2a\u5bf9\u8c61，\u9700\u8981\u4f7f\u7528\u5f15\u53f7\u6216\u5927\u62ec\u53f7\u5305\u56f4（\u5bf9\u4f7f\u7528\u96c6\u5408\u65e0\u6548），\u5173\u4e8e\u5217\u8868\u548c\u96c6\u5408\u7684\u533a\u522b，\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u535a\u5ba2\u3002<\/p>\n

SDC\u547d\u4ee4\u8be6\u89e3：\u4f7f\u7528\u96c6\u5408(Collection)\u800c\u4e0d\u662f\u5b57\u7b26\u4e32(String)\/\u5217\u8868(List)\u4f5c\u4e3a\u547d\u4ee4\u53c2\u6570<\/span>https:\/\/chenzhang.blog.csdn.net\/article\/details\/147144571<\/span><\/span><\/p>\n<\/p>\n

\u6307\u5b9a\u4ec5\u65f6\u5e8f\u8def\u5f84\u8d77\u70b9<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-startpoints_only\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u5728\u5bf9\u8c61\u96c6\u5408\u4e2d\u4ec5\u5305\u542b\u65f6\u5e8f\u8def\u5f84\u8d77\u70b9\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u5bf9\u8c61\u96c6\u5408\u4e2d\u4f1a\u5305\u542b\u4ece\u6307\u5b9a\u5bf9\u8c61\u5411\u524d\u904d\u5386\u76f4\u5230\u65f6\u5e8f\u8def\u5f84\u8d77\u70b9（\u5bf9\u4e8e\u5178\u578b\u7684\u65f6\u5e8f\u8def\u5f84\u662f\u8f93\u5165\u7aef\u53e3（\u5305\u62ec\u8f93\u5165\u8f93\u51fa\u53cc\u5411\u7aef\u53e3）\u6216\u89e6\u53d1\u5668\u7684\u65f6\u949f\u5f15\u811a）\u8fc7\u7a0b\u4e2d\u7684\u6240\u6709\u5f15\u811a\/\u8f93\u5165\u7aef\u53e3\u3002<\/p>\n<\/p>\n

\u6307\u5b9a\u4e0d\u5305\u542b\u9ed1\u76d2<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-exclude_bboxes\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u5bf9\u8c61\u96c6\u5408\u4e2d\u4e0d\u5305\u542b\u9ed1\u76d2\u5355\u5143\u53ca\u5176\u5f15\u811a\u3002<\/p>\n<\/p>\n

\u6307\u5b9a\u505c\u6b62\u5728\u9ed1\u76d2<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-break_on_bboxes\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u5411\u524d\u904d\u5386\u505c\u6b62\u5728\u9ed1\u76d2\u5355\u5143\u7684\u8f93\u51fa\u5f15\u811a（\u5305\u62ec\u8f93\u5165\u8f93\u51fa\u53cc\u5411\u5f15\u811a）\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u5982\u679c\u9ed1\u76d2\u5355\u5143\u6709\u4ece\u8f93\u5165\u5f15\u811a\u5230\u8f93\u51fa\u5f15\u811a\u7684\u65f6\u5e8f\u5f27，\u4f1a\u7ee7\u7eed\u5411\u524d\u904d\u5386\u3002<\/p>\n<\/p>\n

\u6307\u5b9a\u4ec5\u5305\u542b\u5355\u5143<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-only_cells\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u5bf9\u8c61\u96c6\u5408\u4e2d\u53ea\u5305\u542b\u5f15\u811a\u6240\u5c5e\u7684\u5355\u5143\u3002<\/p>\n<\/p>\n

\u6307\u5b9a\u5c55\u5e73\u6a21\u5f0f<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 -flat\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u4ee5\u5c55\u5e73\u6a21\u5f0f\u6267\u884c\u547d\u4ee4\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5c42\u6b21\u6a21\u5f0f，\u5bf9\u8c61\u96c6\u5408\u4e2d\u53ea\u4f1a\u5305\u542b\u548c\u6307\u5b9a\u5bf9\u8c61\u5728\u540c\u4e00\u5c42\u6b21\u4e0b\u7684\u5bf9\u8c61（\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u904d\u5386\u4f1a\u505c\u6b62\u5728\u5c42\u6b21\u5355\u5143\u5f15\u811a）\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86\u5c55\u5e73\u6a21\u5f0f\u548c\u5c42\u6b21\u6a21\u5f0f\u7684\u533a\u522b，\u56fe1\u4e2d\u5b58\u5728\u591a\u6b21\u7a7f\u8d8a\u5c42\u6b21\u7684\u65f6\u5e8f\u8def\u5f84\u3002<\/p>\n

\"\"<\/p>\n

\u56fe1 \u7a7f\u8d8a\u5c42\u6b21\u7684\u4f8b\u5b50<\/p>\n

dcnxt_shell> all_fanin -to [get_pins U_A\/DFF2_reg\/D] -flat
\n{U_A\/DFF1_reg\/CK U_A\/DFF1_reg\/Q U_B\/U1\/A U_B\/U1\/Y U_A\/DFF2_reg\/D}
\ndcnxt_shell> all_fanin -to [get_pins U_A\/DFF2_reg\/D]
\n{U_A\/DFF1_reg\/CK U_A\/DFF1_reg\/Q U_A\/DFF2_reg\/D} <\/p>\n

\u6307\u5b9a\u7ea7\u6570<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-levels\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u5411\u524d\u904d\u5386\u7684\u6700\u5927\u7ea7\u6570，\u4e00\u4e2a\u5355\u5143\u5c5e\u4e8e\u4e00\u7ea7，\u9ed8\u8ba4\u503c\u4e3a\u65e0\u7a77\u5927\u3002<\/p>\n<\/p>\n

\u6307\u5b9a\u65f6\u5e8f\u5f27\u7c7b\u578b<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-trace_arcs\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u5411\u524d\u904d\u5386\u8fc7\u7a0b\u4e2d\u7684\u7ec4\u5408\u903b\u8f91\u65f6\u5e8f\u5f27\u7c7b\u578b，\u5f53\u8bbe\u7f6e\u4e3atiming\u65f6，\u4ec5\u8ffd\u8e2a\u6709\u6548\u7684\u7ec4\u5408\u903b\u8f91\u65f6\u5e8f\u5f27，\u5373\u672a\u56e0set_disable_timing\u547d\u4ee4\u3001set_case_analysis\u547d\u4ee4\u3001\u56fa\u5b9a\u503c\u5f15\u8d77\u7684\u5e38\u91cf\u4f20\u64ad\u3001\u5de5\u5177\u81ea\u52a8\u65ad\u5f00\u7ec4\u5408\u903b\u8f91\u73af(Timing\u00a0Loop)\u548c\u72b6\u6001\u76f8\u5173\u7684\u65f6\u5e8f\u5f27(Conditional Timing Arc)\u7f3a\u5c11\u5bf9\u5e94\u72b6\u6001\u7b49\u539f\u56e0\u800c\u5931\u6548\u7684\u7ec4\u5408\u903b\u8f91\u65f6\u5e8f\u5f27；\u5f53\u8bbe\u7f6e\u4e3aall\u65f6\u5219\u4e0d\u5b58\u5728\u8be5\u9650\u5236\u3002\u4f7f\u7528\u6b64\u9009\u9879\u5c06\u8986\u76d6\u7531fanin_fanout_trace_arcs\u53d8\u91cf（\u9ed8\u8ba4\u503c\u4e3atiming）\u8bbe\u7f6e\u7684\u503c\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8be5\u9009\u9879\u5bf9\u65f6\u5e8f\u903b\u8f91\u65f6\u5e8f\u5f27\u6ca1\u7528，\u4e25\u683c\u610f\u4e49\u4e0a\u8bf4，\u8be5\u9009\u9879\u7684\u4f7f\u7528\u80fd\u8ba9\u5411\u524d\u904d\u5386\u7a81\u7834\u53ea\u80fd\u5728\u4e00\u6761\u65f6\u5e8f\u8def\u5f84\u4e0a\u7684\u9650\u5236\u3002<\/p>\n<\/p>\n

\u6307\u5b9a\u8986\u76d6\u9ed8\u8ba4\u7684\u904d\u5386\u884c\u4e3a<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 -continue_trace\u9009\u9879\u7528\u4e8e\u8986\u76d6\u9ed8\u8ba4\u7684\u904d\u5386\u884c\u4e3a，\u53ef\u4ee5\u5c06\u5176\u6307\u5b9a\u4e3agenerated_clock_source\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5f53\u6307\u5b9a\u4e3agenerated_clock_source\u65f6，\u5f53\u6307\u5b9a\u5bf9\u8c61\u5728\u751f\u6210\u65f6\u949f\u7684\u65f6\u949f\u8def\u5f84\u4e0a\u65f6，\u904d\u5386\u4e0d\u4f1a\u505c\u5728\u751f\u6210\u65f6\u949f\u6e90（\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u8fd9\u662f\u4e00\u4e2a\u65f6\u5e8f\u8def\u5f84\u8d77\u70b9），\u800c\u4f1a\u7ee7\u7eed\u5411\u524d\u904d\u5386\u76f4\u5230\u65f6\u949f\u6e90\u5916\u7684\u65f6\u5e8f\u8def\u5f84\u8d77\u70b9（\u5bf9\u4e8e\u5178\u578b\u7684\u65f6\u5e8f\u8def\u5f84\u662f\u8f93\u5165\u7aef\u53e3（\u5305\u62ec\u8f93\u5165\u8f93\u51fa\u53cc\u5411\u7aef\u53e3）\u6216\u89e6\u53d1\u5668\u7684\u65f6\u949f\u5f15\u811a）\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e25\u683c\u610f\u4e49\u4e0a\u8bf4，\u8be5\u9009\u9879\u7684\u4f7f\u7528\u80fd\u8ba9\u5411\u524d\u904d\u5386\u7a81\u7834\u53ea\u80fd\u5728\u4e00\u6761\u65f6\u5e8f\u8def\u5f84\u4e0a\u7684\u9650\u5236\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86-continue_trace\u9009\u9879\u7684\u4f5c\u7528，\u56fe2\u4e2d\u5b58\u5728\u4e00\u4e2a\u5206\u9891\u65f6\u949f\u3002<\/p>\n

\"\"<\/p>\n

\u56fe2 \u5206\u9891\u65f6\u949f\u7684\u4f8b\u5b50<\/p>\n

dcnxt_shell> create_clock -name CLK -period 10 [get_ports clk]
\n1
\ndcnxt_shell> create_generated_clock -name CLK_DIV2 -source [get_ports clk] -divide_by 2 [get_pins div2_reg_reg\/Q]
\n1
\ndcnxt_shell> all_fanin -to [get_pins dout_reg\/CK]
\n{div2_reg_reg\/Q dout_reg\/CK}
\ndcnxt_shell> all_fanin -to [get_pins dout_reg\/CK] -continue_trace generated_clock_source
\n{div2_reg_reg\/CK div2_reg_reg\/Q dout_reg\/CK} <\/p>\n

Multicorner-Multimode\u652f\u6301<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8be5\u547d\u4ee4\u90e8\u5206\u9009\u9879\u5bf9\u5f53\u524d\u573a\u666f\u751f\u6548，\u90e8\u5206\u9009\u9879\u5bf9\u5bf9\u6240\u6709\u6d3b\u8dc3\u573a\u666f\u751f\u6548\u3002\u5173\u4e8e\u573a\u666f\u7684\u66f4\u591a\u4ecb\u7ecd，\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u535a\u5ba2\u3002<\/p>\n

Design Compiler：\u591a\u5de5\u827a\u89d2\u548c\u591a\u5de5\u4f5c\u6a21\u5f0f(Multicorner-Multimode, MCMM)<\/span>https:\/\/blog.csdn.net\/weixin_45791458\/article\/details\/149578771?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522e3267dcc7cc26380435f53994dc8b9b8%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=e3267dcc7cc26380435f53994dc8b9b8&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~rank_v31_ecpm-1-149578771-null-null.nonecase&utm_term=MCMM&spm=1018.2226.3001.4450<\/span><\/span><\/p>\n

<\/h3>\n

\u5199\u5728\u6700\u540e<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0all_fanin\u547d\u4ee4\u8fd4\u56de\u7684\u662f\u8f93\u5165\u7aef\u53e3\u3001\u5f15\u811a\u548c\u5355\u5143\u5bf9\u8c61\u96c6\u5408，\u4f46\u8fd4\u56de\u5bf9\u8c61\u96c6\u5408\u7684\u547d\u4ee4\u4f1a\u81ea\u52a8\u8c03\u7528query_objects\u547d\u4ee4\u663e\u793a\u5bf9\u8c61\u540d\u5217\u8868，\u6267\u884c\u8be5\u547d\u4ee4\u540e\u53ef\u770b\u5230\u5bf9\u5e94\u5217\u8868（\u5217\u8868\u4e2d\u7684\u5bf9\u8c61\u540d\u6570\u91cf\u6700\u591a\u7531collection_result_display_limit\u53d8\u91cf\u63a7\u5236，\u9ed8\u8ba4\u4e3a100）\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8be5\u547d\u4ee4\u4e0d\u4f9d\u8d56\u5f53\u524d\u5b9e\u4f8b，\u53ea\u6839\u636e\u5f53\u524d\u8bbe\u8ba1\u8fdb\u884c\u67e5\u8be2\u3002\u5b9e\u9645\u4e0a，\u4f7f\u7528\u8be5\u547d\u4ee4\u65f6，\u5f53\u524d\u5b9e\u4f8b\u5fc5\u987b\u662f\u5f53\u524d\u8bbe\u8ba1，\u5426\u5219\u4f1a\u51fa\u73b0No sinks\u63d0\u793a\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u4f7f\u7528current_design\u547d\u4ee4\u5207\u6362\u4e86\u5f53\u524d\u8bbe\u8ba1，\u5219\u76f8\u5bf9\u539f\u5f53\u524d\u8bbe\u8ba1\u5f97\u5230\u7684\u5bf9\u8c61\u96c6\u5408\u4f1a\u6682\u65f6\u5931\u6548，\u5982\u4e0b\u6240\u793a\u3002<\/p>\n

dcnxt_shell> current_design top
\nCurrent design is 'top'.
\n{top}
\ndcnxt_shell> set a [all_fanin -to [get_pins cin]]
\n{cin}
\ndcnxt_shell> query_objects $a
\n{cin}
\ndcnxt_shell> current_design bot
\nCurrent design is 'bot'.
\n{bot}
\ndcnxt_shell> query_objects $a
\nError: No such collection '_sel2040' (SEL-001)
\ndcnxt_shell> current_design top
\nCurrent design is 'top'.
\n{top}
\ndcnxt_shell> query_objects $a
\n{cin}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u76f8\u5173\u9605\u8bfb
\nSDC\u547d\u4ee4\u8be6\u89e3https:\/\/blog.csdn.net\/weixin_45791458\/category_12931432.html all_fanin\u547d\u4ee4\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u8f93\u5165\u7aef\u53e3\u3001\u5f15\u811a\u548c\u5355\u5143\u5bf9\u8c61\u96c6\u5408，\u5305\u542b\u6307\u5b9a\u5bf9\u8c61\u7684\u6247\u5165\u65f6\u5e8f\u8def\u5f84\u4e0a\u7684\u5bf9\u8c61，\u5173\u4e8e\u8bbe\u8ba1\u5bf9\u8c61\u548c\u96c6\u5408\u7684\u66f4\u8be6\u7ec6\u4ecb\u7ecd，\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u535a\u5ba2\u3002
\nSynopsys：\u8bbe\u8ba1\u5bf9\u8c61https:\/\/chenzhang.blog.csdn.net\/article\/details<\/p>\n","protected":false},"author":2,"featured_media":120100,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[7578],"topic":[],"class_list":["post-120103","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-ic"],"yoast_head":"\nSDC\u547d\u4ee4\u8be6\u89e3\uff1a\u4f7f\u7528all_fanin\u547d\u4ee4\u8fdb\u884c\u67e5\u8be2 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/120103.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SDC\u547d\u4ee4\u8be6\u89e3\uff1a\u4f7f\u7528all_fanin\u547d\u4ee4\u8fdb\u884c\u67e5\u8be2 - 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