If the left power operator expression is a numeric constant that has a
value 2^n n>0 then we can use a left shift to calculate the result. This
patch adds code to do this. All other power expressions are flagged as a
compilation error.
This patch adds significantly more functionality to the vlog95 back end.
The following are the major additions:
Display unsigned numbers without undefined bits in hex.
Add support for both L-Value and R-value bit and part selects.
Added support for out of scope references.
Added support for emitting logic gates (range not finished, name is invalid).
Added support for emitting initial/always blocks.
Add support for event inter statement delays.
Convert a blocking inter statement delay assign back to the original form.
Added support for rescaling variable delays.
Added support for the disable statement.
Added support for an event trigger statement (event name is missing).
Added support for calling a user task (calling arguments are missing).
Added support for an event based delay statement (@) (event name is missing)
Not all of these are working as expected since there is not currently a
routine to find a nexus name as a function of scope (needed for event names,
logic gate ports, etc.). Since the Icarus compiler generates structural code
the arguments to modules, module instantiations and calling user tasks are
also still missing.
This patch adds support for using a scope in an expression and calling
a user function. It also fixes an issue in the module name mangling
and calling a system task/function with multiple arguments.
This patch adds the ability to print a delay expression (it is rescaled
to the module timescale) and adds support the following statement types:
nonblocking assignment with a delay (event control is still missing)
condition (if/else)
forever
repeat
while (Icarus translated for loops to while loops)
fork
procedural continuous assign
deassign
force
release
This patch adds support to the vlog95 convert for the ternary operator,
the concat/repeat operator and calling a system function. It also adds
the `celldefine information when appropriate.
This patch adds more support to the Verilog 1995 converter. There is
still a lot that is missing and there is still some implemented
functionality that is not 100%.
Cary R