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| author | Alan Modra <amodra@gmail.com> | 2013-08-17 18:21:58 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2013-10-04 10:31:41 +0930 |
| commit | 1b6adf888de14675bc3207578dcb7132ed5f8ecc (patch) | |
| tree | d3f1bc0076f24429772ea316b624fcc5bf7bebd8 /stdio-common/printf_fp.c | |
| parent | 4cf69995e26e16005d4e3843ad4d18c75cf21a04 (diff) | |
| download | glibc-1b6adf888de14675bc3207578dcb7132ed5f8ecc.zip glibc-1b6adf888de14675bc3207578dcb7132ed5f8ecc.tar.gz glibc-1b6adf888de14675bc3207578dcb7132ed5f8ecc.tar.bz2 | |
PowerPC floating point little-endian [1 of 15]
http://sourceware.org/ml/libc-alpha/2013-08/msg00081.html
This is the first of a series of patches to ban ieee854_long_double
and the ieee854_long_double macros when using IBM long double. union
ieee854_long_double just isn't correct for IBM long double, especially
when little-endian, and pretending it is OK has allowed a number of
bugs to remain undetected in sysdeps/ieee754/ldbl-128ibm/.
This changes the few places in generic code that use it.
* stdio-common/printf_size.c (__printf_size): Don't use
union ieee854_long_double in fpnum union.
* stdio-common/printf_fphex.c (__printf_fphex): Likewise. Use
signbit macro to retrieve sign from long double.
* stdio-common/printf_fp.c (___printf_fp): Use signbit macro to
retrieve sign from long double.
* sysdeps/ieee754/ldbl-128ibm/printf_fphex.c: Adjust for fpnum change.
* sysdeps/ieee754/ldbl-128/printf_fphex.c: Likewise.
* sysdeps/ieee754/ldbl-96/printf_fphex.c: Likewise.
* sysdeps/x86_64/fpu/printf_fphex.c: Likewise.
* math/test-misc.c (main): Don't use union ieee854_long_double.
ports/
* sysdeps/ia64/fpu/printf_fphex.c: Adjust for fpnum change.
Diffstat (limited to 'stdio-common/printf_fp.c')
| -rw-r--r-- | stdio-common/printf_fp.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c index e20eab6..2b93e6c 100644 --- a/stdio-common/printf_fp.c +++ b/stdio-common/printf_fp.c @@ -332,8 +332,7 @@ ___printf_fp (FILE *fp, int res; if (__isnanl (fpnum.ldbl)) { - union ieee854_long_double u = { .d = fpnum.ldbl }; - is_neg = u.ieee.negative != 0; + is_neg = signbit (fpnum.ldbl); if (isupper (info->spec)) { special = "NAN"; |