LOG2_BY_256_INVERSE  113 maint/gnulib/lib/expl.c     long double nm = roundl (x * LOG2_BY_256_INVERSE); /* = 256 * n + m */
LOG2_BY_256_INVERSE  113 maint/gnulib/lib/expm1.c     double nm = round (x * LOG2_BY_256_INVERSE); /* = 256 * n + m */
LOG2_BY_256_INVERSE  123 maint/gnulib/lib/expm1l.c     long double nm = roundl (x * LOG2_BY_256_INVERSE); /* = 256 * n + m */