Re: EXTERNAL: Re: [vhdl-200x] Modular types

From: Brent Hayhoe <Brent.Hayhoe@Aftonroy.com>
Date: Thu Jul 10 2014 - 15:50:21 PDT
On 08/07/2014 09:24, tgingold@free.fr wrote:
>> I agree that the resolution proposal inherently feels wrong to use as
>> a solution.
>>
>> I'm not sure I understand what the problems  with (1) are (apart from
>> overflowing) in performing all the arithmetic in normal integer mode
>> and implicitly converting to the modular type on assignment.
> Well, the arithmetic is not the same.  Eg: (3 + 1) mod 3
>
> For a signed type, the result is 1.
> For a modular type with a modulus of 4, the result is 0.
>
> Regards,
> Tristan.
>
That's why the proposal is carry out the 'mod' function implicitly on the final 
assignment to the actual.

Regards,

Brent.

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Received on Thu Jul 10 15:52:50 2014

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