[Octave-bug-tracker] [bug #64361] sinc() return NaN on sinc(-1:0.20:1-0.20) expression

[Rik]

Follow-up Comment #30, bug #64361 (project octave):

Using __attribute__ ((target ("no-avx"))) does work.

Interestingly, it does so not by making the outcome of array_value() equal to
an exact zero for element 6, but instead by having the test "x != 0" return
false for the sixth element.  This removes it from consideration in the sinc
function.

But, there is still a difference between the access functions in Range.h as
this code shows

octave:2> [x](6)
ans = 5.551115123125783e-17
octave:3> x(6)
ans = 0
octave:4> x != 0
ans =

  1  1  1  1  1  0  1  1  1  1



So, using attributes would narrowly fix this particular bug report, but would
not, it seems, have full consistency between the two approaches.

This does seem like an annoying processor-specific bug.


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