At 11:35 PM 1/15/03 +0100, you wrote:
>Does anyone have any examples on fast 512 bit multiplication ?
>I'm talking about 512bit x 512bit.

No, but it's a straightforward extension of smaller multiplications.
Done without a hardware multiplier you have to do as many as 512 64 byte
additions (128 byte if you want a 1024 bit result), so it will be
fairly slow, tens of milliseconds, maybe.

>Is there any PIC's that have a MULT operation easing this ?

The PIC18 series and the PIC17C series have 8 x 8 hardware multipliers, but
those won't ease it, just make it faster.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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