Re: [vhdl-200x-ft] Some notes from last night's telecon - from David Bishop #2

From: David Bishop <dbishop@server.vhdl.org>
Date: Thu Oct 28 2004 - 11:10:52 PDT

> N-005 - "numeric_unsigned" and "numeric_bit_unsigned" (which
> are analogous to the "std_logic_unsigned" package) are currently independent
> package. These should be made dependent on "numeric_std" and "numeric_bit"
> so that synthesis tools will be able to immediately use them.

One big downside to this:

Now, if a vector gets truncated in the
NUMERIC_STD.TO_STD_LOGIC_VECTOR(INTEGER, SIZE) function
you get the error message:

# ** Warning: NUMERIC_STD.TO_UNSIGNED: vector truncated

Which is kind of what the old Synopsys "std_logic_unsigned" package
does, but it does not tell you what function the warning came from.

-- 
David W. Bishop dbishop@vhdl.org       All standard disclaimers apply.
Received on Thu Oct 28 11:10:55 2004

This archive was generated by hypermail 2.1.8 : Thu Oct 28 2004 - 11:11:22 PDT