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author | Joseph Myers <joseph@codesourcery.com> | 2018-08-01 22:22:00 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2018-08-01 22:22:00 +0000 |
commit | f6dcefbe607e7c190388c11db0a80a80e6ce9686 (patch) | |
tree | 99803e519b2b6558b404e2c4b03bcfcaa59a3e50 /sysdeps/mips | |
parent | fa67ba06ee07845a2bac34afa609ee2bbb1e017e (diff) | |
download | glibc-f6dcefbe607e7c190388c11db0a80a80e6ce9686.zip glibc-f6dcefbe607e7c190388c11db0a80a80e6ce9686.tar.gz glibc-f6dcefbe607e7c190388c11db0a80a80e6ce9686.tar.bz2 |
Fix math/test-misc.c for undefined fenv.h macros.
math/test-misc.c contains some code that uses fenv.h macros
FE_UNDERFLOW, FE_OVERFLOW and FE_UPWARD without being conditional on
those macros being defined.
That would normally break the build for configurations (typically
soft-float) not defining those macros. However, the code in question
is inside LDBL_MANT_DIG > DBL_MANT_DIG conditionals. And, while we
have configurations lacking rounding mode and exception support where
LDBL_MANT_DIG > DBL_MANT_DIG (soft-float MIPS64 and RISC-V), those
configurations currently define the fenv.h macros in question even for
soft-float.
There may be some case for defining those macros in cases where a
soft-float compilation could use a hard-float libm (where both
soft-float and hard-float can use the same ABI, as on ARM and RISC-V,
for example). But MIPS is not such a case - the hard-float and
soft-float ABIs are incompatible - and thus I am testing a patch to
stop defining those macros for soft-float MIPS (motivated by reducing
the extent to which architectures need their own definitions of
math-tests.h macros - if lack of rounding mode / exception support can
be determined by the lack of macros in fenv.h, that avoids the need
for math-tests.h to declare that lack as well). Introducing a case of
LDBL_MANT_DIG > DBL_MANT_DIG without these macros defined shows up the
problem with math/test-misc.c. This patch then fixes that problem by
adding appropriate conditionals.
Tested for MIPS64 in conjunction with changes to stop defining the
macros in question in bits/fenv.h for soft-float.
* math/test-misc.c (do_test) [LDBL_MANT_DIG > DBL_MANT_DIG]: Make
code using FE_UNDERFLOW conditional on [FE_UNDERFLOW], code using
FE_OVERFLOW conditional on [FE_OVERFLOW] and code using FE_UPWARD
conditional on [FE_UPWARD].
Diffstat (limited to 'sysdeps/mips')
0 files changed, 0 insertions, 0 deletions