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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.
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Reduce much of the redundancy in this file, and attempt
to coral the type specific stuff to ease adding an new type.
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This file is partially generated. To make updates a little
simpler, I have moved the generated code into a partially
contained header to simplify regeneration.
gen-tst-strtod-round.c now takes two, mandatory arguments.
These arguments specify the input test data and the output
destination, respectively.
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