math: fix __fpclassifyl(-0.0) for IEEE binary128

The sign bit was not cleared before checking for 0 so -0.0
was misclassified as FP_SUBNORMAL instead of FP_ZERO.
This commit is contained in:
Szabolcs Nagy 2015-02-08 17:41:56 +01:00
parent 6e76e1540f
commit 3f92f92cb9
1 changed files with 2 additions and 3 deletions

View File

@ -24,12 +24,11 @@ int __fpclassifyl(long double x)
{
union ldshape u = {x};
int e = u.i.se & 0x7fff;
u.i.se = 0;
if (!e)
return u.i2.lo | u.i2.hi ? FP_SUBNORMAL : FP_ZERO;
if (e == 0x7fff) {
u.i.se = 0;
if (e == 0x7fff)
return u.i2.lo | u.i2.hi ? FP_NAN : FP_INFINITE;
}
return FP_NORMAL;
}
#endif