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[ clisp-Bugs-1683394 ] TANH floating point overflow for large short or single float
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From: SourceForge.net <no...@so...> - 2007-03-19 14:20:01
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Bugs item #1683394, was opened at 2007-03-19 01:01 Message generated for change (Comment added) made by sds You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=101355&aid=1683394&group_id=1355 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: clisp Group: lisp error >Status: Pending >Resolution: Invalid Priority: 5 Private: No Submitted By: Robert Dodier (robert_dodier) >Assigned to: Sam Steingold (sds) Summary: TANH floating point overflow for large short or single float Initial Comment: (TANH 1.0s3) => floating point overflow (TANH 1.0f3) => floating point overflow (TANH 1.0d3) => 1.0d0 (OK) (TANH 1.0l3) => 1.0L0 (OK) Clisp 2.38 / Linux. I looked at the Changelog and didn't see anything about TANH. Hope this helps. ---------------------------------------------------------------------- >Comment By: Sam Steingold (sds) Date: 2007-03-19 10:19 Message: Logged In: YES user_id=5735 Originator: NO (exp 1.0l3) ==> 1.9700711140170469939L434 which is bigger than most-positive-double-float (1.7976931348623157E308) thus you cannot expect tanh to work on this number for D, F, S. the reason (TANH 1.0d3) works is that cosh and sinh are computed (and divided) in long precision and then the result is converted to doubles, so it works "through the back door". ---------------------------------------------------------------------- Comment By: Sam Steingold (sds) Date: 2007-03-19 10:19 Message: Logged In: YES user_id=5735 Originator: NO This bug report is now marked as "pending"/"invalid". This means that we think that the problem you report is not a problem with CLISP. Unless you - the reporter - act within 2 weeks, the bug will be permanently closed. Sorry about the inconvenience - we hope your silence means that you agree that this is not a bug in CLISP. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=101355&aid=1683394&group_id=1355 |