Re: [Valgrind-users] mysterious failures when using valgrind

[John R. <jreiser@BitWagon.com>]

> When run directly, the output is
> 
> 3fbc79ca10c9242235d511e976394d7a
> 
> When run through valgrind, the output is:

> 3fbc79ca10c9240e12445f2000000000

This has been entered as bug  https://bugs.kde.org/show_bug.cgi?id=325328 .
The likely cause is __float128 operations being performed as "double precision"
of two __float80 by the Intel math library for x86_64.  Memcheck-3.8.1 implements
__float80 operations as __float64 (ordinary IEEE-754 'double'.)

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