Parameters can have string type and do the usual string stuff,
and also implement some of the string methods on string parameters
so that they evaluate down to constants.
Use the common data_type_or_implicit rules to support type
definitions for parameters. This eliminates a bunch of special
rules in parse.y, and opens the door for parameters having
more complex types.
In the rare cases where DARRAY signals are in the network, handle
them by creating the proper ivl_nexus_t node. This also implements
the receive of vvp_object_t objects bu vvp_fun_anyedge_sa. This
together makes it possible for IVL_VT_DQUEUE objects to be in
wait lists.
This fixes#412
A NetESelect is used for accessing packed struct members and also for
accessing dynamic array elements. In these cases the expr_type() and
enumeration() methods should reflect the member/element type.
The compiler elaborates types on the fly as they are used. For user-
defined types (typedefs) we must do the elaboration in the scope where
the type was declared, not in the scope where it is used.
If the condition expression is 2-state, the result won't be blended, so
the result will be a valid enum value if both true and false expressions
return the same enum type.
The fix for the compiler hang when calculating the sensitivity list
for an always_comb construct containing recursive function calls
could cause the compiler to ignore sequential calls to the same
function, and thus not add the arguments of those calls to the
sensitivity list.
We don't support evaluating user-defined system functions at compile
time. If possible, defer evaluation until run time. If used in a
constant expression, output a "sorry" message.
The unique, unique0, and priority keywords can decorate case statements
to tell the run time (or synthesis) to do extra tests (or make extra
assumptions). These tests are not implemented in the vvp run time, but
now the decorations make it to the code generators.
The compilation unit scope is now treated as a specialised form of
package (with an automatically generated name). All items declared
outside a design element are added to the current compilation unit
package. Apart from when searching for a symbol, once we get into
elaboration we can treat these just like any other package.
A compressed assignment statement should give exactly the same
result as the equivalent uncompressed statement. This means
that the type (signed/unsigned) of the LHS affects the type of
the RHS expression (unlike in normal assignments). We need to
take care that bit/part selects and concatenations are correctly
identified as unsigned values, even in the cases where they
reduce to a single whole signal.
Synthesis could only handle relatively simple conditional constructs.
This rework aims to make it handle anything the user can throw at it
(or output a sensible message as to why it can't).
Changes so "Microsoft Visual Studio Express 2015 RC Web" could build it without a bunch of runtime errors and crashes during regression testing. When declaring an bitfield variable of type enum in a struct, the enum has to have an underlying integer type for MSVC++ when compiling a C++ file, and for these cases, it had to be unsigned integer for everything to work okay during regression testing.
Stephen Williams
Martin Whitaker
Cary R
Henry Wong
Michele Castellana
Larry Doolittle
Johann Klammer
Christian Taedcke
Frederick C. Kurz
Martin Whitaker