Re: [Valgrind-users] valgrind breaks any long double operation on x86-64

[John R. <jr...@Bi...>]

> Can anyone guide me dissect a problem with
> valgrinds long double fp math on x86-64 cpus? We're getting major
> malfunctions in our applications because any long double operation
> (say y=sinl(x)) contains rubbish in the least significant bits.

This is a well-known and long-standing property of valgrind.  For instance:
http://valgrind.10908.n7.nabble.com/valgrind-does-not-handle-long-double-td41633.html
[Search the 'net for "valgrind long double".]

There is no solution.  If IEEE-754 'double' is not good enough for you,
then valgrind is not good enough for you.