Remove redundant pointer to the containing NetPins object by keeping
the pointer only in the first Link (pin 0) of an array of links. In
this link, replace the pin number with the NetPins pointer, and set
a pins_zero_ flag to indicate that this has happened. This way, only
the first pin in a Link array will have the pointer to the NetPins
that contains the array, and the pointer takes up practically no space
at all.
This class was old, and its original design pulled literally from
the LPM reference. But of nine pins declared, only 4 were used.
Remove all the excess junk and clean up the designed dump handling
of the device.
The r-value expression takes on at least the width of the l-value. If
there is a sized width greater then the l-value width, take that on
instead. But if the r-value is unsized, there are unsized sub-expressions
that cause the expression as a whole to be unlimited width, so elaborate
and evalulate the r-value as lossless.
The true and false expression clauses must have compatible types,
which are not necesarily identical. In particular, VT_BOOL and
VT_LOGIC are compatible for the purposes of ternary arguments. The
test in NetETernary::synthesize was incorrect.
In the process, fix the type handling of NetConst objects to allow
for IVL_VT_BOOL constants. This is information that the downstream
may find useful, so should be handled correctly.
It's processed once by AC_OUTPUT in configure.in and then again
by AC_OUTPUT in tgt-vhdl/configure.in. This is a bug from when I
first started on the VHDL target, and was basing it on the tgt-vvp
code. The call to configure in the tgt-vhdl directory is not
actually necessary either, since it doesn't do any checks not
performed elsewhere, so that should proably be removed later.
This patch pushes the non-blocking event control information to
the code generator. It adds the %evctl statements that are used
to put the event control information into the special thread
event control registers. The signed version (%evctl/s) required
the implementation of %ix/getv/s to load a signed value into
an index register. It then adds %assign/wr/e event control based
non-blocking assignment for real values. It also fixes the other
non-blocking real assignments to use Transport instead of inertial
delays.
When the -V flag is passed to the iverilog command, we can easily
print the version information for the driver itself, but it is also
valuable to probe all the components that would have been used for
a real compile. So the driver executes the preprocessor and the ivl
core to have them print version information.
The ivl core program also tries to load the target code generator
and get version information to print. For this to work, create a new
optional entry point "target_query" that takes a query key string as
an argument and returns a const string as the result. Use this with
the key "version" to get version information out of the target.
Target selection is done by the DLL target code generator, so there
is no value having a layer of target selection ahead of it. Remove
all that redundant code and simplify the target config files to reflect
this.
It is possible for signe-extend to have a delay attached to it. (Same
for repeat.) Handle it like other LPM devices, by stuffing a .delay
device into the output path of the device, if appropriate.
Nothing to do with tab width! Eliminates useless
trailing spaces and tabs, and nearly all <space><tab>
pairings. No change to derived files (e.g., .vvp),
non-master files (e.g., lxt2_write.c) or the new tgt-vhdl
directory.
Low priority, simple entropy reduction. Please apply
unless it deletes some steganographic content you want
to keep.
Statements can have attributes attached to them. Handle a few cases in
the parser where attributes may be attached to statements, and get them
as far as the pform.
This patch adds blocking repeat event controls and also makes the
base repeat statement sign aware. If the argument to repeat is
negative (it must be a signed variable) then this is treated just
like an argument of 0 (there is no looping). Doing this allows us
to model the repeat event control as follows.
lhs = repeat(count) @(event) rhs;
is translated to:
begin
temp = rhs;
repeat (count) @(event);
lhs = temp;
end
This patch also pushes the non-blocking event control
information to the elaboration phase where it will report they
are not currently supported.
The generate block is a placeholder for the generate items, and it
is the items themselves that can specify the name of the generate
block that is created.
Add "include" to fix error with abort() in dup_expr.cc
Add "include" to AStatement.h so usage of struct PExpr works
Get rid of eval_tree.cc:577: warning: suggest parentheses around comparison in operand of ^
The right shift of vvp_vector2_t needs to
account for and mask off shifted bits. Otherwise
there will be unexpected results after
a vvp_vector2_t::trim method.
This patch adds the constant system functions for Verilog-2005
and Verilog-AMS. These are evaluated at compile time. $abs(),
$min() and $max() support their polymorphic behavior in the
compiler where it really matters. They are always evaluated
as reals in the run time and the result/argument(s) will be
converted as needed.
The Verilog-2005 functions are available if using the 2005
generation (default) and if either the icarus-misc (also on
by default) or verilog-ams flags are set.
The Verilog-AMS functions are available if either the
icarus-misc or verilog-ams flags are set.
Stephen Williams
Cary R
Nick Gasson
Larry Doolittle