AVR C Runtime Library - Patches: patch #6680, Sine, cosine functions
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patch #6680: Sine, cosine functions
Submitter: | Ruud <ruud62> | ||
Submitted: | Mon 24 Nov 2008 01:13:45 PM UTC | ||
Category: | None | Priority: | 3 - Low |
Status: | None | Privacy: | Public |
Assigned to: | dmix | Open/Closed: | Open |
Thu 12 May 2011 10:30:13 PM UTC, comment #2: |
Eric Weddington <arcanum>![]() |
Tue 08 Jun 2010 11:51:00 AM UTC, comment #1: Dmitry is our Mr. libm. |
Joerg Wunsch <joerg_wunsch>![]() |
Mon 24 Nov 2008 01:13:45 PM UTC, original submission:
Hi All,
The issues are the sine, cosine functions. When I started to try to speed-up the sine function I noticed that version 1.6.3 was quite inaccurate (errors as much as 2 times the lsb). So I made a quick draft of an improved? Version.. See attached file fp_sinus2. This is by no means intended as a final version, but is merely meant as an quick draft which needs improving and splitting (powsodd should be used by tan, tanh… etc). The results however are quite good. See attached sintest.txt (written with notepad windows). More than twice the speed and much better accuracy..
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Ruud <ruud62>![]() |
Depends on the following items: None found
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Follow 3 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2010-06-08 | joerg_wunsch | Assigned to | None | ![]() |
dmix |
2008-11-24 | ruud62 | Attached File | - | ![]() |
Added sintest.txt, #16912 |
Attached File | - | ![]() |
Added fp_sinus2.s, #16913 |
Dmitry, could you please take a look at these patches?