--- Comment #1 from pluto at agmk dot net 2006-05-10 14:51 ---
you're violating the aliasing rules, so use -fno-strict-aliasing option.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27533
--- Comment #2 from ulrich dot lauther at siemens dot com 2006-05-10 14:53
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Created an attachment (id=11434)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11434action=view)
Complete tiny example exposing the problem
I submit this version that includes stdio.h for readability,
--- Comment #3 from ulrich dot lauther at siemens dot com 2006-05-10 14:55
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Created an attachment (id=11435)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11435action=view)
same as before, but stdio.h expanded
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27533
--- Comment #4 from reichelt at gcc dot gnu dot org 2006-05-10 14:59
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As Pawel already pointed out:
Your code is brokan as you are violating the aliasing rules.
Please read about this in the non-bug section of http://gcc.gnu.org/bugs.html :
Casting does not work as expected when
--- Comment #5 from pluto at agmk dot net 2006-05-10 15:26 ---
(In reply to comment #0)
The code
inline int almost_equal(float a, float b, int maxUlps = 16) {
int intDiff = *(reinterpret_castint*(a)) -
*(reinterpret_castint*(b));
if you really need such
