Microchip AN617 has a collection of routines for fixed point up to 32X32.  A
32X32 multiply will produce a 64 bit result.  The are in assembler, but can
be called from C without too much work.

"Hackers Delight" also has a multiply routine in C for arbitrary length
integers.

Bruce Partridge
http://www.rebreather.ca

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of deva seetharam
> Sent: Sunday, January 18, 2004 12:13 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [pic:] 64-bit datatypes for pic 18f
>
>
> hello,
>
> i am writing an application that needs support for 64-bit long integers
> on microchip pic 18f series. i am using ccs c to write this
> application and
> as you may know, ccs c compiler doesn't support 64-bit datatypes.
> could anyone suggest a library that i could use?
>
> thanks in advance,
> deva
>
>
>
>
>
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