Re: [Amforth] Quite trivial

[Enoch <ix...@ho...>]

Rafael Gonzalez <ast...@ya...> writes:

> Maybe it is a trivial observation, but I see that 2/ is a bad idea for addresses > 32KWhatever (bytes or words)
> since sign propagation will produce an incorrect address. I defined u2/ myself for that purpose.

Good point, thanks!

Interestingly, RC1 does not address this important issue of sign
extension.

Yes, we should have u2/ in our lib as well.

Regards, Enoch.

> ________________________________
>  De: Enoch <ix...@ho...>
> Para: amf...@li... 
> Enviado: Lunes 1 de abril de 2013 7:29
> Asunto: [Amforth] Quite trivial
>  
> Hello Matthias & All:
>
> Here's a useful word to add to our lib (IMHO).
>
> Regards, Enoch.
>
> P/S ( f-addr count ) is produced by s"
>
> ----------------------------------------------------------------------
>
> \ copy "count" bytes from Flash to RAM
> : imove  ( f-addr count addr -- )
>    swap 0 ?do
>       over i 2/ + @i
>       i 1 and  if  ><  then
>       over i + c!
>    loop
>    2drop
> ;
>
>
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