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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_fphex.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_fphex.c')
-rw-r--r--stdio-common/printf_fphex.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/stdio-common/printf_fphex.c b/stdio-common/printf_fphex.c
index 3da2eec40c..50b6fbfbc7 100644
--- a/stdio-common/printf_fphex.c
+++ b/stdio-common/printf_fphex.c
@@ -93,7 +93,7 @@ __printf_fphex (FILE *fp,
   union
     {
       union ieee754_double dbl;
-      union ieee854_long_double ldbl;
+      long double ldbl;
     }
   fpnum;
 
@@ -162,12 +162,11 @@ __printf_fphex (FILE *fp,
 #ifndef __NO_LONG_DOUBLE_MATH
   if (info->is_long_double && sizeof (long double) > sizeof (double))
     {
-      fpnum.ldbl.d = *(const long double *) args[0];
+      fpnum.ldbl = *(const long double *) args[0];
 
       /* Check for special values: not a number or infinity.  */
-      if (__isnanl (fpnum.ldbl.d))
+      if (__isnanl (fpnum.ldbl))
 	{
-	  negative = fpnum.ldbl.ieee.negative != 0;
 	  if (isupper (info->spec))
 	    {
 	      special = "NAN";
@@ -181,8 +180,7 @@ __printf_fphex (FILE *fp,
 	}
       else
 	{
-	  int res = __isinfl (fpnum.ldbl.d);
-	  if (res)
+	  if (__isinfl (fpnum.ldbl))
 	    {
 	      if (isupper (info->spec))
 		{
@@ -194,11 +192,9 @@ __printf_fphex (FILE *fp,
 		  special = "inf";
 		  wspecial = L"inf";
 		}
-	      negative = res < 0;
 	    }
-	  else
-	    negative = signbit (fpnum.ldbl.d);
 	}
+      negative = signbit (fpnum.ldbl);
     }
   else
 #endif	/* no long double */