Re: Proposal for two additional environment parameter functions

Why not implement $simprobe as your own VPI function, thus minimizing
clutter in the language?

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2. $simprobe(instance, param_name [, expression])
Similar to $simparam(), this function will retrieve the value  of a given
parameter from a given instance. If the instance/parameter does
not exist, it
will stop with an error. If the optional argument <expression> is
specified, it
will return this value in lieu of the error. This function is not
limited to
retrieving values from Spice elements, but also Verilog-AMS instances.

[LRM TEXT]
$simprobe() allows the user to query the value of an element within the
specified instance. The function returns a real scalar value.
The general form of the $simprobe function is:
	$simprobe(instance, param_name [, expression])

<instance> is a string constant (either a literal or string
parameter). If the
string is prefixed with a '.' character, then the characters
following the '.'
character make up the full hierarchical name of the instance to
query. If the
first character of the instance string is not a '.', then the
string is the
local name of the instance to query. It is a compilation error to use a
hierarchical instance name where the string is not prefixed with
a '.' character.

<param_name> is the name of the parameter whose value is required. It is a
string constant (either a literal or string parameter). A
parameter can be any
valid scalar or indexed vector output parameter for the instance
in question.

<expression> is an optional argument. It can be any valid Verilog-AMS
expression. When specified, its value will be returned in case of
an error.

When <instance> is specified in the hierarchical form,
<param_name> will be
retrieved from <instance>. If <instance> or <param_name> does not exist an
error will be raised. If <expression> has been specified, it's
value will be
returned in lieu of raising the error.

Example:
module grandchild();
   parameter string inst = ".atop.ch";
   analog $strobe("%m: Value of '%s' is %g", inst, $simprobe(inst,"x"));
endmodule
module child();
   real x;
   grandchild gc();
   analog x = 10;
endmodule
module top();
   real x;
   child ch();
   analog x = 5.0;
endmodule
    



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