Handle parameter value ranges as far as the pform. The +-inf expressions
are not handled yet, nor is the single value exclude, but the other
cases are handled.
This patch adds file and line information for parameters and
local parameters. It also adds file/line stubs for signals in
the tgt-* files. It adds the pform code needed to eventually
do genvar checks and passing of genvar file/line information.
It verifies that a genvar does not have the same name as a
parameter/local parameter.
This patch adds code to push the file and line information
for scope objects (modules, functions, tasks, etc.) to the
runtime. For modules, this includes the definition fields.
This patch reworks much of the ternary code to short circuit when
possible and supports real values better. It adds a blend operator
for real values that returns 0.0 when the values differ and the value
when they match. This deviates slightly from the standard which
specifies that the value for reals is always 0.0 when the conditional
is 'bx. There are also a couple bug fixes.
These fixes have not been ported to continuous assignments yet.
Ternary operators used at compile time and in procedural assignments
should be complete (short circuit and support real values).
When a bit port of a module instance is connected to a vector
argument, the MSB module instance should be connected to the MSB
of the vector argument. This matters only in the rare case that
the %m is used. It also makes wave dumps come out right.
Normally processes are found in the lexical scope of a module, but
there are special cases where processes (other then task/function
definitions) are in other lexical scopes. The most likely case is
initilizations that are in the lexical scope where the assigned
variable is declared.
In the process, the behaviors list is kept in the base PScope class
instead of the Module or any other derived lexical scope class.
All the pform objects that represent lexical scope now are derived
from the PScope class, and are kept in a lexical_scope table so that
the scope can be managed.
Generate case is a complex generate scheme where the items are
sub-schemes of the case generate itself. The parser handles them
something like nested generate statements, but storing the case
guards as the test expression. Then the elaborator notes the
case scheme and reaches into the case item schemes inside to make
up tests, select the generate item, and elaborate.
Currently, if a localparam declaration does not include a type or
range, the RHS expression is cast to an unsigned value. This patch
changes this to make the localparam inherit the type of the RHS
expression, as is done for parameter declarations and is specified
by the Verilog-2001 standard.
Rework the handling of file names to use a perm_string heap to hold
the file names, instead of the custom file name heap in the lexor.
Also rename the get_line to get_fileline to reflect its real duties.
This latter chage touched a lot of files.
Nil parameter overrides can turn up in positional paramter override
lists, where items are intentionally skipped.
Signed-off-by: Stephen Williams <steve@icarus.com>
NetTaskDef and NetFuncDef functions are created during
signal enaboration, and carry these objects in the
NetScope class instead of the extra, useless map in
the Design class.
I now generate the scopes and notice the parameters
in a separate pass over the pform. Once the scopes
are generated, I can process overrides and evalutate
paremeters before elaboration begins.
Stephen Williams
Cary R
Martin Whitaker
Larry Doolittle
Martin Whitaker
steve