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Hi, Can someone recommend an accurate square root algorithm for a double precision 48 bit fractional number between 0 and 1? Best Regards, Kevin www.checkeffect.net |
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square root algorithm for DSP56300
Started by ●October 24, 2004
Reply by ●October 25, 20042004-10-25
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Hi Kevin Jack Ganssle's home page offers a PDF with many trig approximations. http://www.ganssle.com/approx.htm I would also recommend his newsletter to any embedded engineer. Rick Corey -----Original Message----- From: KR [mailto:] Sent: Saturday, October 23, 2004 9:04 PM To: Subject: [motoroladsp] square root algorithm for DSP56300 Hi, Can someone recommend an accurate square root algorithm for a double precision 48 bit fractional number between 0 and 1? Best Regards, Kevin www.checkeffect.net _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 Yahoo! Groups Links |
Reply by ●October 26, 20042004-10-26
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Hi Kevin Here are some sources mentioned in a talk given by Jack Ganssle at the recent Embedded Systems Conference in Boston - Math Toolkit for Real-Time Programming by Jack Crenshaw "Higher Precisions": Dr. Dobbs September 1993 "Infinite Integers": Dr. Dobbs Jan. 1995 When you find a good one, how about sharing it and the source with the list? Rick Corey -----Original Message----- From: KR [mailto:] Sent: Saturday, October 23, 2004 9:04 PM To: Subject: [motoroladsp] square root algorithm for DSP56300 Hi, Can someone recommend an accurate square root algorithm for a double precision 48 bit fractional number between 0 and 1? Best Regards, Kevin www.checkeffect.net _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 Yahoo! Groups Links |
Reply by ●November 6, 20042004-11-06
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Kevin, Get an inter-library loan of Computer approximations By: John F Hart Publisher: New York, Wiley [1968] ISBN: 0471356301 It's out of print. You can buy it used if you can find it (Very pricey). It has tables coefficients for many types of approximations in different ranges of accuracy. I use it a few times a year. I have used it for square roots and logs for the most part in RMS routines. Let me know if you have problems finding it. Via NG post I don't always remember to check this email account. --- In , "KR" <kevin@r...> wrote: > > Hi, > Can someone recommend an accurate square root algorithm for a double > precision 48 bit fractional number between 0 and 1? > > Best Regards, > Kevin > www.checkeffect.net |
