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19 Commits

Author SHA1 Message Date
Stephen Williams b292a5fc05 Create a branch object to be the argument to the access function. 
The NetBranch object is connected, but not like an object, so the
NetPins object base class is factored out from NetObj to handle the
connectivity, and the NetBranch class uses the NetPins to connect a
branch.

Also, account for the fact that nets with a discipline are by default
real-valued.
 2008-08-04 20:54:05 -07:00
steve d3a54547aa Properly account for tri0 connected to otherwise open mux input. 2007-04-14 03:10:51 +00:00
steve e4ae832153 Clean up spurious trailing white space. 2004-10-04 01:10:51 +00:00
steve 61195c5daa Harmless fixup of warnings. 2003-06-21 01:21:42 +00:00
steve 52bf4e613f conditional ident string using autoconfig. 2002-08-12 01:34:58 +00:00
steve 9fc4e1eddd Cache calculated driven value. 2002-06-25 01:33:22 +00:00
steve 58c2e12507 Make link_drive_constant cache its results in 
the Nexus, to improve cprop performance.
 2002-06-24 01:49:38 +00:00
steve d7fb47268f Shuffle link_drivers_constant for speed. 2002-06-19 04:18:46 +00:00
steve e35ed6e91c Change the NetAssign_ class to refer to the signal 
instead of link into the netlist. This is faster
 and uses less space. Make the NetAssignNB carry
 the delays instead of the NetAssign_ lval objects.

 Change the vvp code generator to support multiple
 l-values, i.e. concatenations of part selects.
 2001-08-25 23:50:02 +00:00
steve b825f8d2b2 Create a config.h.in file to hold all the config 
junk, and support gcc 3.0. (Stephan Boettcher)
 2001-07-25 03:10:48 +00:00
steve fb0c387b12 Detect and make available to t-dll the right shift. 2001-07-07 03:01:37 +00:00
steve d3bff8a451 links to root inputs are not constant. 2001-02-16 03:27:07 +00:00
steve 482323843e Whoops, return the calculated constant value rom driven_value. 2000-11-20 01:41:12 +00:00
steve f4443a7dfa Add support for supply nets (PR#17) 2000-11-20 00:58:40 +00:00
steve 42e4ff47c8 Move inital value handling from NetNet to Nexus 
objects. This allows better propogation of inital
 values.

 Clean up constant propagation  a bit to account
 for regs that are not really values.
 2000-07-14 06:12:56 +00:00
steve 583868e74e Redesign Links to include the Nexus class that 
carries properties of the connected set of links.
 2000-06-25 19:59:41 +00:00
steve ea96c3ef66 Support initialization of FF Q value. 2000-05-14 17:55:04 +00:00
steve b90cda1f3f Carry strength values from Verilog source to the 
pform and netlist for gates.

 Change vvm constants to use the driver_t to drive
 a constant value. This works better if there are
 multiple drivers on a signal.
 2000-05-07 04:37:55 +00:00
steve 2094a2f466 Catch some simple identity compareoptimizations. 2000-04-20 00:28:03 +00:00