In the olden days, the .alias was necessary to create a net name
that is an alias to an existing net in the netlist. But now that
the .net no longer creates a node in the netlist, ALL .net objects
are aliases of a sort, so this (mis)feature gets in the way.
This patch adds cleanup code that cleans up the memory that is
allocated by the of_EXEC_UFUNC command. This knocks a few more
files off the valgrind list.
The tranif input pins are normally nothing special, but sometimes
they are fed back from the switch body. In this case, the control
needs to see the current *output* from the fed back port, in order
to get the results that people expect.
Control inputs (i.e. the control input to tranif switches)
are not driven in any way by the island, so use .import records
instead of .port records to bring them into the island. Properly
handle the now potentially different bindings within the island
and outside the island. This means the draw_net_input_x function
is a little more sophisticated, and the node data more complex.
This is needed to get vvp to compile under MacOS 10.6 and possibly other
64 bit systems that define uint64_t as unsigned long long vs unsigned
long (both are 64 bits).
Add a configuration check that says we would like to use C99 if the
compiler supports it. Also change the lround(), nan(), fmin() and
fmax() checks to look in the default libraries as well as the math
library.
Update the iverilog-vpi sh script to correctly quote CC since it
may now have two words (gcc -std=gnu99).
Add a missing int for main in draw_tt.c.
Nets that are created after being put off for later processing to
allow the vvp_net to be created, need to be more carefully placed
in the correct scope.
When releasing a net, the release method must force that the
filter propagate the released value to the output. Use the
needs_init_ flag to do that force.
The vpi_callback base class is parent of the filter object of nets,
and not the functor. The good news is the clear_all_callbacks method
can now be got at without casts.
When reading from thread space only read the first 32 bits
(sizeof int) for the part select base. This matches the other
parts of the PV_get_base() code.
This patch fixes a problem in the .part/v select when the index is
undefined. The default value needs to be INT_MIN, so when the long
is cast to an int the value is in range.
To get better functionality in V0.9 and development until we
add a select that is sign aware to .part/v this patch uses
a 32 bit integer (int) for the select value. This allows a
normal Verilog integer to produce the correct results. A
warning for smaller signed index vectors is planned, but it
needs more input.
The first input through a net needs to be propagated, since this
is used as an initialization for the net. This patch also cleans
up wires to not need the width_ member, instead inferring the
width from the saved bit value.
Whether and what to propagate after a release of a part needs to
match the behavior of the full-vector release. Nets need to restore
their driver, and regs need to hold their forced value.
filters need to be able to cope with parts of vectors moving through
the net. It makes the most sense to handle every filter as a part-
selected filter.
&PV<> was just using vpi_get_value() when a signal was driving
the select. This incorrectly returned 0 for 'bx or 'bz. This
patch adds a check for an undefined value and returns INT_MIN
for this case.
Now that .net nodes are references to filters into vvp_net_t objects
and are no longer functors on their own, the .alias node becomes
exactly the same as a .net itself.
Stephen Williams
Cary R