Re: A89: sine and cosine

To: assembly-89@lists.ticalc.org
Subject: Re: A89: sine and cosine
From: Zoltan Kocsi <zoltan@bendor.com.au>
Date: Mon, 29 Nov 1999 16:56:48 +1100 (EST)
In-Reply-To: <0.5805dec2.257369bd@aol.com>
References: <0.5805dec2.257369bd@aol.com>
Reply-To: assembly-89@lists.ticalc.org


 > from what i was able to gather about the CORDIC algorithm, i would need a 
 > lookup table for arctan values.  i think it would be jumping through one less 
 > hoop just to make a table for cos values.  if i am wrong, please correct me.

Yes, the CORDIC has a lookup table. However, an N-bit CORDIC needs a 
lookup table with N entries, unlike a direct lookup table of 2^N entries.

With 16-bit precision, the 32 byte lookup needed for the CORDIC is
significantly less than the 128K needed for a direct lookup, IMHO ...

Regards,

Zoltan

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Re: A89: sine and cosine

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