[Bug math/19839] hypot() crashing w/SIGILL at xxlxor on power7 systems

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=19839

--- Comment #3 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
AFAIK all POWER7 processors implements this instruction and there is no need to
do some register preparation to use it.

However, kernel does play a role in VMX/VSX to try optimize context switching:
the process is started as with VMX/VSX disabled and thus for context switching
only GPR register are save/restore. On first VMX/VSX instruction the kernel
will trap and enable it and starting to add the VMX/VSX context. So it might be
a kernel issue in fact. Could you try to run on a more recent kernel?

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