[PATCH] ldbl-128: Refactor modfl snan handling

[Joseph Myers]

On Mon, 8 Aug 2016, Paul E. Murphy wrote:

> This causes a test failure on float128/ppc64le
> as the multiplication is optimized away.  This
> updates it to use conversions similar to other
> files.

This patch is not relative to current glibc.  You'll also need to explain 
why the

# These files quiet sNaNs in a way that is optimized away without
# -fsignaling-nans.
CFLAGS-s_modf.c += -fsignaling-nans
CFLAGS-s_modff.c += -fsignaling-nans
CFLAGS-s_modfl.c += -fsignaling-nans

in math/Makefile isn't working, as it is for all the similar 
implementations and other architectures.

-- 
Joseph S. Myers
joseph@codesourcery.com