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authorSzabolcs Nagy <szabolcs.nagy@arm.com>2017-10-03 18:12:42 +0100
committerSzabolcs Nagy <szabolcs.nagy@arm.com>2017-10-04 10:15:12 +0100
commit86c27ade1e44e29922d33676f950f7334edb37a7 (patch)
treef1a56c25057b1af6d66df83321beb906c1914fd6 /sysdeps/ieee754/flt-32/e_jnf.c
parent8f8f8ef7aba40ef883291e4c4d95a419c3327d70 (diff)
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[BZ #22244] Fix yn(n,0) without SVID wrapper
Without SVID compat wrapper yn(n,0) and ynf(n,0) does not raise
the divide-by-zero excpetion and it may return inf with the wrong
sign for n < 0.

	[BZ #22244]
	* sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_yn): Fix x == 0 case.
	* sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_ynf): Likewise.
Diffstat (limited to 'sysdeps/ieee754/flt-32/e_jnf.c')
-rw-r--r--sysdeps/ieee754/flt-32/e_jnf.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/sysdeps/ieee754/flt-32/e_jnf.c b/sysdeps/ieee754/flt-32/e_jnf.c
index 82b9ba3300..4b78ecea6c 100644
--- a/sysdeps/ieee754/flt-32/e_jnf.c
+++ b/sysdeps/ieee754/flt-32/e_jnf.c
@@ -194,15 +194,15 @@ __ieee754_ynf(int n, float x)
 	ix = 0x7fffffff&hx;
     /* if Y(n,NaN) is NaN */
 	if(__builtin_expect(ix>0x7f800000, 0)) return x+x;
-	if(__builtin_expect(ix==0, 0))
-		return -HUGE_VALF+x;  /* -inf and overflow exception.  */
-	if(__builtin_expect(hx<0, 0)) return zero/(zero*x);
 	sign = 1;
 	if(n<0){
 		n = -n;
 		sign = 1 - ((n&1)<<1);
 	}
 	if(n==0) return(__ieee754_y0f(x));
+	if(__builtin_expect(ix==0, 0))
+		return -sign/zero;
+	if(__builtin_expect(hx<0, 0)) return zero/(zero*x);
 	SET_RESTORE_ROUNDF (FE_TONEAREST);
 	if(n==1) {
 	    ret = sign*__ieee754_y1f(x);