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Some error checking.
Agressively merge NetAssign_ within concatenations.
elaborate complex l-values
move lval elaboration to PExpr virtual methods.
initialize vlog info.
Support unary + and - in constants.
ack, detect when lval fails.
The + operator now preserves signedness.
more robust abut ternary bit widths.
Fix bit padding of assign signal-to-signal
encapsulate access to the l-value expected width.
Change elaborate_lval to return NetAssign_ objects.
Properly ignore NetAssign_ objects.
Slightly more helpful warning.
Pull NetAssign_ creation out of constructors.
Rearrange NetAssign to make NetAssign_ separate.
t-dll iterates signals, and passes them to the
Some of NetObj should return char*, not string.
Handle out of range part select expressions.
Get at gate information for ivl_target interface.
Clean up warnings and portability issues.
Add ivl_target support for logic gates, and
make the interface more accessible.
Add target calls for scope, events and logic.
Proper error messages when port direction is missing.
add th t-dll functions for net_const, net_bufz and processes.
use -fPIC for sparc.
Limit signal scope search at module boundaries.
Start stub for loadable targets.
Move all file manipulation out of target class.
Add the -N switch to the iverilog command.
target methods need not take a file stream.
Add vpi_vlog_info support from Adrian
use bufif0 if z is in true case of mux.
tri01 support in vvm.
Extend x or z that is top bit of a constant.