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[Octave-bug-tracker] [bug #43741] different results from power operator
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI |
Date: |
Wed, 01 Apr 2015 20:38:27 +0000 |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:36.0) Gecko/20100101 Firefox/36.0 |
Follow-up Comment #8, bug #43741 (project octave):
So is the answer just to accept that machine calculations are only good to
within eps of the true result? Certainly for long matrix calculations I
accept this. It's just a little disheartening when you have a simple
expression that doesn't yield the expected simple result.
Reading the man page for gcc, using -ffloat-store sounds like it could have
negative repercussions on performance if one can't park intermediate
calculations in the dedicated floating point registers. Maybe it's miniscule
these days with SSE instructions. That, at least, could be verified.
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- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, John W. Eaton, 2015/04/01
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI,
Rik <=
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, John W. Eaton, 2015/04/01
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, Avinoam Kalma, 2015/04/01
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, Rik, 2015/04/01
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, Rik, 2015/04/01
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, John W. Eaton, 2015/04/02
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, John W. Eaton, 2015/04/02
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, Rik, 2015/04/02
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, John W. Eaton, 2015/04/02
- [Octave-bug-tracker] [bug #43741] different results from power operator in mxe-octave GUI/CLI, Rik, 2015/04/02