From: Joseph Myers <joseph@codesourcery.com>
Date: Thu, 10 Oct 2013 19:11:30 +0000 (+0000)
Subject: Avoid ordered comparisons of NaNs in ldbl-128ibm acosl and asinl.
X-Git-Tag: glibc-2.19~621
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=6f10289efb65e97917ebe42686f492a0037ec129;p=glibc.git

Avoid ordered comparisons of NaNs in ldbl-128ibm acosl and asinl.
---

diff --git a/ChangeLog b/ChangeLog
index 66780cbaa4..d7d764f886 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2013-10-10  Joseph Myers  <joseph@codsourcery.com>
+
+	* sysdeps/ieee754/ldbl-128ibm/e_acosl.c (__ieee754_acosl): Check
+	for NaNs before doing comparisons on argument.
+	* sysdeps/ieee754/ldbl-128ibm/e_asinl.c (__ieee754_asinl):
+	Likewise.
+
 2013-10-10  Will Newton  <will.newton@linaro.org>
 
 	* malloc/hooks.c (memalign_check): Ensure the value of bytes
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_acosl.c b/sysdeps/ieee754/ldbl-128ibm/e_acosl.c
index 86639930c9..2cb288238b 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_acosl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_acosl.c
@@ -153,6 +153,8 @@ __ieee754_acosl (long double x)
 {
   long double a, z, r, w, p, q, s, t, f2;
 
+  if (__glibc_unlikely (__isnanl (x)))
+    return x + x;
   a = __builtin_fabsl (x);
   if (a == 1.0L)
     {
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_asinl.c b/sysdeps/ieee754/ldbl-128ibm/e_asinl.c
index 99a5b85fa0..dece11875b 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_asinl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_asinl.c
@@ -134,6 +134,8 @@ __ieee754_asinl (long double x)
   long double a, t, w, p, q, c, r, s;
   int flag;
 
+  if (__glibc_unlikely (__isnanl (x)))
+    return x + x;
   flag = 0;
   a = __builtin_fabsl (x);
   if (a == 1.0L)	/* |x|>= 1 */