Re: [sdcc-devel] Anyone an IEEE member, or have IEEE library?

[Scott D. <sc...@da...>]

On Tue, 3 Aug 2004, Paul Stoffregen wrote:

> Is anyone here a member of the IEEE Transactions on Computers group?

Paul,

I'm not an IEEE member and do not know anything about the paper you cite. 
And I'm not going to specifically address the topic you raise either. :)

However, I'm familiar with computing the arcsine function. Here's an 
implementation for the midrange PIC processors:

http://www.dattalo.com/technical/software/pic/arcsine.asm

The CORDIC algorithm is interesting, but in my experience for PIC's a look 
up table with linear interpolation is more efficient; at least for low 
resolutions like 8-10 bits. The CORDIC algorithm scales better than look 
up tables for higher resolutions (which probably explains why you never 
see look up tables for floating point libraries). I never attempted to 
determine the resolution boundary where one would choose one algorithm 
over the other.

Anyway, sorry to waste a little bandwidth here...

Scott