Hi,
Aren't the (shortValue&0xFF) and (shortValue>>8) optimized ? I think they
are, at least for pic16.
Sebastien
On Tue, Mar 30, 2010 at 10:10 AM, Kustaa Nyholm
<[email protected]>wrote:
> Classically this has been done in C by defining a union of two chars and a
> short or int, something like:
>
> typedef union {
> char asBytes[2];
> short asShort;
> } myType;
>
>
> ..
>
> myType temp;
>
> temp.asShort = yourIntValue;
>
> temp.asShort[0]; // lo byte or hi byte
>
>
> This technique is of course totally dependent on compiler and endiandness
> and compiler options, and thus is not portable.
>
> If the variable (temp above) is global, IIRC, SDCC produces decently
> effective code for above.
>
> br Kusti
>
>
>
> > From: Grissiom <[email protected]>
> > Reply-To: <[email protected]>
> > Date: Tue, 30 Mar 2010 08:47:26 +0300
> > To: <[email protected]>
> > Conversation: [Sdcc-user] What is the efficient way to get the high/low
> byte
> > of a 16bit int?
> > Subject: Re: [Sdcc-user] What is the efficient way to get the high/low
> byte of
> > a 16bit int?
> >
> > Hello,
> >
> > I have asked a smiler question on stackoverflow.com <
> http://stackoverflowcom>
> > :
> >
> >
> http://stackoverflow.com/questions/2538614/ways-to-divide-the-high-low-byte-fr
> > om-a-16bit-address
> >
> > Sorry for cross posting but the question there is more general and have
> > more audience.
> >
> > Any comment is strongly welcome.
> >
> > --
> > Cheers,
> > Grissiom
>
>
>
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