Less than an hour response time from the guy who wrote it... I can't think
of a better justification for selecting a product.

---
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-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Clyde Smith-Stubbs
Sent: Wednesday, March 22, 2000 02:55
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: 16-bit arithmetic in C


On Wed, Mar 22, 2000 at 02:38:16AM , Michael Rigby-Jones wrote:
> It certainly would make a neat macro if it worked.  However, I've just
tried
> it on V7.85, compiling for a 16F877 with maximum optimisation and it got
> it's knickers in a twist:

You didn't show your C code, but here's what I tried:

;x.c: 7: count = (CCPR1H << 8) + CCPR1L;
        movf    22,w    ;volatile
        movwf   _count+1
        movf    21,w    ;volatile
        movwf   _count

Looks fine to me.

Of course, the other (better) way to do it, which works since CCPR1L and
CCPR1H are adjacent and in the right order, is this

static unsigned int     CCPR1 @ 0x15;

Now you can just use it directly.

Regards, Clyde

PS - Mick, I don't think Clive James reads the PIClist.

--
Clyde Smith-Stubbs               |            HI-TECH Software
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