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Tristates break when a child modules does has no driver #54

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veripoolbot opened this issue Jan 22, 2009 · 2 comments
Closed

Tristates break when a child modules does has no driver #54

veripoolbot opened this issue Jan 22, 2009 · 2 comments

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@veripoolbot veripoolbot commented Jan 22, 2009


Author Name: Lane Brooks
Original Redmine Issue: 54 from https://www.veripool.org
Original Date: 2009-01-22
Original Assignee: Wilson Snyder (@wsnyder)


This is my issue to fix.

Example that breaks current tristate:

module parent();
childA(.Y(Y));
childB(.Y(Y));
endmodule

module childA(inout Y);
assign Y = (en) ? 1'b0 : 1'bz;
endmodule

module childB(inout Y);
// don't drive Y
endmodule

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@veripoolbot veripoolbot commented Apr 22, 2012


Original Redmine Comment
Author Name: Wilson Snyder (@wsnyder)
Original Date: 2012-04-22T02:44:22Z


Fixed in git towards 3.840+.

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@veripoolbot veripoolbot commented Jul 31, 2012


Original Redmine Comment
Author Name: Wilson Snyder (@wsnyder)
Original Date: 2012-07-31T22:57:04Z


In 3.840.

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