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math: fix __fpclassifyl(-0.0) for IEEE binary128

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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
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5
src/math/__fpclassifyl.c
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@ -24,12 +24,11 @@ int __fpclassifyl(long double x)
{ {
union ldshape u = {x}; union ldshape u = {x};
int e = u.i.se & 0x7fff; int e = u.i.se & 0x7fff;
u.i.se = 0;
if (!e) if (!e)
return u.i2.lo | u.i2.hi ? FP_SUBNORMAL : FP_ZERO; return u.i2.lo | u.i2.hi ? FP_SUBNORMAL : FP_ZERO;
if (e == 0x7fff) { if (e == 0x7fff)
u.i.se = 0;
return u.i2.lo | u.i2.hi ? FP_NAN : FP_INFINITE; return u.i2.lo | u.i2.hi ? FP_NAN : FP_INFINITE;
}
return FP_NORMAL; return FP_NORMAL;
} }
#endif #endif