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alpha: Fix isnan 

The isunordered formulation raises SIGFPE for SNaN.
This commit is contained in:
Richard Henderson 2014-07-01 08:27:49 -07:00
parent a1ac3184fa
commit 631021e0aa
3 changed files with 7 additions and 24 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2014-07-01 Richard henderson <rth@redhat.com>
* sysdeps/alpha/fpu/bits/mathinline.h (__isnanf): Remove.
(__isnan, __isnanl): Remove.
* sysdeps/alpha/fpu/s_isnan.c (__isnan): Use integer arithmetic.
* sysdeps/alpha/fpu/libm-test-ulps: Update.
2014-07-01 Stefan Liebler <stli@linux.vnet.ibm.com>

23
sysdeps/alpha/fpu/bits/mathinline.h
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@ -120,29 +120,6 @@ __NTH (__signbitl (long double __x))
return __builtin_signbitl (__x);
#endif
}
/* Test for NaN. Used in the isnan() macro. */
__MATH_INLINE int
__NTH (__isnanf (float __x))
{
return isunordered (__x, __x);
}
__MATH_INLINE int
__NTH (__isnan (double __x))
{
return isunordered (__x, __x);
}
#ifndef __NO_LONG_DOUBLE_MATH
__MATH_INLINE int
__NTH (__isnanl (long double __x))
{
return isunordered (__x, __x);
}
#endif
#endif /* C99 */
#endif /* __NO_MATH_INLINES */

4
sysdeps/alpha/fpu/s_isnan.c
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@ -31,7 +31,9 @@
int
__isnan (double x)
{
return isunordered (x, x);
uint64_t ix;
EXTRACT_WORDS64 (ix, x);
return ix * 2 > 0xffe0000000000000ul;
}
hidden_def (__isnan)