This patch causes unnamed generate blocks to be automatically named
using the naming scheme defined in the Verilog-2005 standard. This
is a fix for the problem discussed in pr1821610.
Here are some more array fixes. They are mostly better error messages
instead of just asserting and some code cleanup. The one new thing
that probably should have been a separate submission is that down
indexed part select [base -: width] can now be a lvalue.
@* was only expanding to input nets. nex_input() for blocks was removing
any output net that was also an input. There was also a bug in how output
nets were removed. Only outputs currently defined were removed from the
input list.
always @(*) begin
y = a;
z = y;
end
would report "a" as an input. While
always @(*) begin
z = y;
y = a;
end
would report both "a" and "y" as inputs.
To fix this all nex_inputs now take a flag that when true (the default)
correctly removes any output from the input list. Both the above cases
will now return "a". If the flag is false outputs which are also inputs
will be included in the input list. This is what the @* elaboration code
uses to get the correct sensitivity list.
It is legal in Verilog to bind expressions to ports that do not
match the port width. Icarus Verilog needs to create the necessary
part selects to get the connections right.
Signed-off-by: Stephen Williams <steve@icarus.com>
This patch adds functionality to verify that primitives are given
an appropriate number of ports. For multiple output gates (but,
not, pulldown, pullup) it also reports that Icarus currently does
not support multiple outputs when more than one is given.
This patch adds checks to verify that functions do not invoke
statements that are invalid for them (#, @, wait, enable/call
tasks and non blocking assignment). For reference see section
10.3.4 of 1364-2001.
more general concept of arrays. The NetMemory and NetEMemory
classes are removed from the ivl core program, and the IVL_LPM_RAM
lpm type is removed from the ivl_target API.
Martin Whitaker
Cary R
Stephen Williams
steve