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EWClay

Member Since 23 Dec 2012
Offline Last Active Apr 17 2013 05:34 AM

Topics I've Started

Fast sin and cos functions

08 January 2013 - 07:53 AM

I was looking around for fast sin and cos functions, especially for calculating the two together using sse.

 

I found an old post on devmaster.net describing a fast approximation for sin, but the code was incomplete. So I took that and adapted it for sse intrinsics, adding a SinCos function so I could get the second one for free.

 

The code is here:

 

http://dtosoftware.wordpress.com/2013/01/07/fast-sin-and-cos-functions/

 

Two points:

  1. Feel free to use it, though don't bother unless you have a pressing performance reason; the standard sin and cos functions are actually pretty good.
  2. Can you do better? Can a look up table beat this? Or can the code be optimised even more?

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