The l*[rint|round]f implements uses alpha 'cvtst/s', 'addt/suc',
adn 'cvttq/svd' which are not not fully IEEE compliant w.r.t
inexact-flag raising.. Use the software fallback implementation
instead.
Checked on alpha-linux-gnu.
Tested-by: Michael Cree <mcree@orcon.net.nz>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
