Re: minutes Verilog-AMS Committee Meeting - 19 April 2007

From: Marq Kole <marq.kole_at_.....>
Date: Fri Apr 20 2007 - 08:03:10 PDT

Geoffrey,

If there is no access to individual characters of a string, we do not need to define the type of the individual character. As we have said that we do not support the string methods (IEEE 1800-2005, 4.7.1-15) there is no issue with these methods. Then considering the operators in 1800-2005, Table 4-2: if we decide not to support the indexing operation, all possible references/acces methods to bytes from 1800-2005 are absent and you leave out the refence to the byte type when copying the SV text.

Alternatively, if the indexing operator is considered too useful to leave out, we can restrict the interpretation of the byte data type to an ASCII value as defined in 1800-2005, Table 4-1 (so not as 2-value SystemVerilog value, nor as 8-bit signed integer, only as ASCII character). However, in my opinion this can better wait until we move to SV-AMS and accept the full package for string and byte types in AMS.

Cheers,
Marq


Marq Kole
Domain Leader Robust Design

Research
NXP Semiconductors
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"Geoffrey.Coram" <Geoffrey.Coram@analog.com> Sent by: owner-verilog-ams@server.eda.org 20-04-2007 16:04

To verilog-ams <verilog-ams@server.eda-stds.org> cc Subject Re: minutes Verilog-AMS Committee Meeting - 19 April 2007 Classification

Marq Kole wrote:
>
> Geoffrey will update section 3 (merged_datatype) with the
> string variable as discussed in the review of section 11.

I think it was the review of section 10, system tasks.

I'm struggling with the SV text, which makes lots of references to the "byte" datatype, eg,
   A single character of a string variable is of type byte.
as well as many of the examples.

AMS doesn't have a byte type (nor does 1364), so what is a single character of a string variable going to be?  I think we might need to add the byte datatype for this.

-Geoffrey

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