The strtod function should raise the "inexact" exception when its
result is inexact, but fails to do so except in the case of underflow
or overflow. This patch fixes it to do so for all inexact results.
tst-strtod-round is extended to test for this exception; the generator
is fixed to properly mark inexact results as such in the case where
the inexactness is from the mpfr_subnormalize step.
Tested for x86_64, x86 and powerpc.
[BZ #19380]
* stdlib/strtod_l.c (round_and_return): Force "inexact" exception
for inexact results.
* stdlib/gen-tst-strtod-round.c (string_to_fp): Return indication
of inexact result where mpfr_subnormalize is the only inexact
step.
* stdlib/tst-strtod-round-data.h: Regenerated.
* stdlib/tst-strtod-round-skeleton.c [!FE_INEXACT] (FE_INEXACT):
Define to 0.
(GEN_ONE_TEST): Test inexact exceptions raised are as expected.
This extends tst-strtod-round with a few trivial changes
to also test the wide character variants of strto* using
similar macros to other shared tests.
Joseph Myers
Rajalakshmi Srinivasaraghavan
Paul E. Murphy