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authorAlan Modra <amodra@gmail.com>2013-08-17 18:21:58 +0930
committerAlan Modra <amodra@gmail.com>2013-10-04 10:31:41 +0930
commit1b6adf888de14675bc3207578dcb7132ed5f8ecc (patch)
treed3f1bc0076f24429772ea316b624fcc5bf7bebd8 /stdio-common/printf_fp.c
parent4cf69995e26e16005d4e3843ad4d18c75cf21a04 (diff)
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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.c3
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";