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| author | Joseph Myers <joseph@codesourcery.com> | 2017-06-22 22:46:27 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-06-22 22:46:27 +0000 |
| commit | d08cdabdd096325a3296713c87672f213b05f5c6 (patch) | |
| tree | 8bc7b48f8a43c030f8f1b9e7bfa82cefb23c139e /ChangeLog | |
| parent | 46d2e49c49165c09d8ebf555e56d74d063102342 (diff) | |
| download | glibc-d08cdabdd096325a3296713c87672f213b05f5c6.zip glibc-d08cdabdd096325a3296713c87672f213b05f5c6.tar.gz glibc-d08cdabdd096325a3296713c87672f213b05f5c6.tar.bz2 | |
Correct min_of_type handling of _Float128.
The math_private.h macro min_of_type has broken _Float128 handling:
instead of passing its type argument to the key __EXPR_FLT128 macro,
it passes x, which is not a macro argument but whatever variable
called x happens to be visible in the calling function. If that
variable has the wrong type, the wrong one of long double and
_Float128 can get chosen. In particular, this applies to some
_Complex long double functions (where x happens to have type _Complex
long double, resulting in min_of_type returning a _Float128 value when
it should return a long double value). For some reason, this only
caused test failures for me on x86_64 with GCC 6 but not GCC 7 (I
suspect it triggers known bugs in conversions from x86 long double to
_Float128 that are present in GCC 6's soft-fp).
Tested for x86_64 (in conjunction with float128 patches).
* sysdeps/generic/math_private.h (__EXPR_FLT128): Do not apply
typeof to argument passed to __builtin_types_compatible_p.
(min_of_type): Pass type argument, not x, to __EXPR_FLT128.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -1,5 +1,9 @@ 2017-06-22 Joseph Myers <joseph@codesourcery.com> + * sysdeps/generic/math_private.h (__EXPR_FLT128): Do not apply + typeof to argument passed to __builtin_types_compatible_p. + (min_of_type): Pass type argument, not x, to __EXPR_FLT128. + * math/w_acos_template.c [__USE_WRAPPER_TEMPLATE]: Include <errno.h>. * math/w_acosh_template.c [__USE_WRAPPER_TEMPLATE]: Likewise. |