Re: [sv-ec] unpacked array embedded in struct as wire type

Is T a valid data type for a net?  Yes, because
 
T is an unpacked struct.  Does each element of it, as required by bullet
2, have a valid data type for a net?  Yes, because
 
    'a' has data type 'reg', which is identical to 'logic', the default
data type of a net.  As required by bullet 1, 'logic' is a 4-state
integral type.
 
    'arr' is an unpacked array.  Does each element of it, as required by
bullet 2, have a valid data type for a net?  Yes, because each is a
packed array of 'reg', hence each has a 4-state integral type, as
required by bullet 1.
 
-- Brad

________________________________

From: owner-sv-ec@eda.org [mailto:owner-sv-ec@eda.org] On Behalf Of
danielm
Sent: Friday, July 13, 2007 4:22 AM
To: sv-ec@eda.org
Subject: [sv-ec] unpacked array embedded in struct as wire type


How to interpret below LRM statement:

>If a data type is not specified in the net declaration, then the data
type of the net is logic.Certain restrictions apply to the data type of
a net. A valid data type for a net shall be one of the following:

>a) A 4-state integral type, including a packed array or packed struct

>b) An unpacked array or unpacked struct, where each element has a valid
data type for a net

Is it allowed to have net with type :  struct with unpacked array inside
- example:

typedef struct {reg a; reg [3:0] arr [10];} T;

wire T w;

Maybe LRM may be worded more precise here.

DANiel


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