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[Octave-bug-tracker] [bug #31579] Floating point mod function does not m
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From: |
Rik |
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Subject: |
[Octave-bug-tracker] [bug #31579] Floating point mod function does not match Matlab |
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Date: |
Tue, 09 Nov 2010 18:14:42 +0000 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101027 Ubuntu/9.10 (karmic) Firefox/3.6.12 |
Follow-up Comment #3, bug #31579 (project octave):
The new mod/rem routines always copy the sign bit. This does no harm when
the remainder is zero, but does look a bit odd. For example:
mod (2,-1)
ans = -0
whereas in 3.2.4
mod (2,-1)
ans = 0
The change below would fix it, but it isn't critical to implement it.
original:
if (x != y && y != 0)
retval = copysignf (retval, y);
new:
if (x != y && y != 0 && retval !=0)
retval = copysignf (retval, y);
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