From 9568c0c2255045456a09b441f89c6641e27a4bec Mon Sep 17 00:00:00 2001
From: Joseph Myers <joseph@codesourcery.com>
Date: Mon, 30 Apr 2012 09:37:01 +0000
Subject: Fix exp10 spurious overflows (bug 13924).

---
 math/e_exp10l.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'math/e_exp10l.c')

diff --git a/math/e_exp10l.c b/math/e_exp10l.c
index e3dad0a183..d57c8cfa4f 100644
--- a/math/e_exp10l.c
+++ b/math/e_exp10l.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 2011 Free Software Foundation, Inc.
+/* Copyright (C) 1998-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
@@ -18,13 +18,16 @@
 
 #include <math.h>
 #include <math_private.h>
-
+#include <float.h>
 
 long double
 __ieee754_exp10l (long double arg)
 {
-  /* This is a very stupid and inprecise implementation.  It'll get
-     replaced sometime (soon?).  */
-  return __ieee754_expl (M_LN10l * arg);
+  if (__finitel (arg) && arg < LDBL_MIN_10_EXP - LDBL_DIG - 10)
+    return LDBL_MIN * LDBL_MIN;
+  else
+    /* This is a very stupid and inprecise implementation.  It'll get
+       replaced sometime (soon?).  */
+    return __ieee754_expl (M_LN10l * arg);
 }
 strong_alias (__ieee754_exp10l, __exp10l_finite)
-- 
cgit 1.4.1