alliance-support '2000
Re: TROUBLE WITH SCR(2)


Ludovic JACOMME (Ludovic.JACOMME@asim.lip6.fr)
Wed, 30 Aug 2000 08:42:08 +0200

On Tue, Aug 29, 2000 at 05:32:46PM +0200, Gianluca Cornetta wrote: > Hi, > > attached to this mail you will fin the vst description of a (5,3) > counter as well as the .ap file produced by the router using the > command scr -p -r -l 1 <cell name>. > > As you will see the channel routing (using sclib) is completely > wrong. However this is only a minor bug because in some cases > SCR does nor perfor the channel routing and i have had to do it > by hand!!! > > This is only a test file; my design is much more complex and > uses CPL differential logic that I have created by myself using GRAAL. > The design is a bitsliced multiplier, where a row i produces the bit of > weight 2^i of the result. > > The multiplier is described bitslice by bitslice and the routin is done > separately > for each bitslice forcing the layout to occupy one row > > using scr -p -r -l 1 <slice name>; however for some slice > the standard cell are only placed but not routed. > I cannot picture myself the cause of all this, maybe a wrongly set > environment variable...... > Please let me know. > > Best regards, > > --Gianluca > > Hi Gianluca, Ok, i have found the problem. You use sclib library cell, but this library is not supported any longer. SCR has a special environment variable called SCR_SCLIB to route with sclib cells, but unfortunately this mode doesn't work properly. So, i suggest you to set the MBK_CATA_LIB as follows : setenv MBK_CATA_LIB $ALLIANCE_TOP/cells/sc2sxlib:$TOP/cells/sxlib. The sc2sxlib library is used to "convert" design using sclib to a new design using only sxlib. Be carefull because each cell of sxlib has multiple connectors inside, (not like a cell of sclib, which has connectors only on the abutment box !) Best regards, Ludo. (_) ___ Ludovic JACOMME _ _ ( ) ( ) ( ) ( 6 ) Laboratoire LIP6, Equipe ASIM ( ) (_) ( _ ) Couloir 55-65, 2eme etage, ( )___ ( ) Universite P. et M. Curie (P6) (_____) (_) 4 place Jussieu, 75252 Paris Cedex 05 Tel: (33) 01.44.27.54.15 Fax: (33) 01.44.27.72.80 ICQ: 62526530 mailto: Ludovic.Jacomme@asim.lip6.fr http: //asim.lip6.fr/~ludo

 



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