Rework lexical support for PACKAGE_IDENTIFIER so that the lexor
can help with package scoped identifiers.
Pform package types and package functions up to elaboration.
IVL_VT_NO_TYPE is now used to signal an untyped LHS in a parameter
declaration. The parser function that handles specparam declarations
needs to do this too. Also, although it should never happen, make
sure we don't set the expression width in a NetECast object to a
negative number. Make constant evaluation of NetECast objects
observe the expression width.
A package can have parameters, but it does not have specparams or
keep the order the parameters are defined. This patch skips these
items if the scope is not a Module.
This was temporarily implemented to just copy definitions to the
local scope, but the better method is to create a PEIdent that has
the package attached to it.
defparam assignments found inside a generate block were being stored
in the enclosing module scope. They should be stored in the generate
block scope.
Also removed the genvar list from the PGenerate class, as this is
already declared in the base LexicalScope class.
In vvp, create the .var/str variable for representing strings, and
handle strings in the $display system task.
Add to vvp threads the concept of a stack of strings. This is going to
be how complex objects are to me handled in the future: forth-like
operation stacks. Also add the first two instructions to minimally get
strings to work.
In the parser, handle the variable declaration and make it available
to the ivl_target.h code generator. The vvp code generator can use this
information to generate the code for new vvp support.
An important advantage of program blocks is its ability to nest
within a module. This winds up also allowing modules to nest, which
is legal but presumably less used feature.
This patch extends the compiler to support all specparam declarations
allowed by the 1364-2005 standard. For compatibility with other
simulators, it allows specparam values to be used in any constant
expression, but outputs a warning message and disables run-time
annotation of a specparam if it is used in an expression that must
be evaluated at compile time.
This is a cleanup in preparation for better support of range lists.
(cherry picked from commit 8f7cf3255acad55841f8b3725e3786ef49daad68)
Conflicts:
PTask.h
elab_scope.cc
elab_sig.cc
parse.y
pform.cc
pform.h
pform_types.h
Signed-off-by: Stephen Williams <steve@icarus.com>
Class methods belong in a class scope, not the containing module.
So create a lexical scope that carries tasks and functions and
create a PClass to represent classes.
This adds the vector_type_t and real_type_t types to handle
vector and real types in tf_port items. This cleans up a lot
of the parsing for these items.
Martin Whitaker
Cary R
Stephen Williams
Arun Persaud
Martin Whitaker