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| author | Joseph Myers <joseph@codesourcery.com> | 2012-04-30 09:37:01 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-04-30 09:37:01 +0000 |
| commit | 9568c0c2255045456a09b441f89c6641e27a4bec (patch) | |
| tree | 880b9ddc21a1bc83fbb5ec3af9c57db5365eef35 /math/e_exp10l.c | |
| parent | 6c1ff08cf8734e77b9201d968ae8bbc0626d09a4 (diff) | |
| download | glibc-9568c0c2255045456a09b441f89c6641e27a4bec.tar.gz glibc-9568c0c2255045456a09b441f89c6641e27a4bec.tar.xz glibc-9568c0c2255045456a09b441f89c6641e27a4bec.zip | |
Fix exp10 spurious overflows (bug 13924).
Diffstat (limited to 'math/e_exp10l.c')
| -rw-r--r-- | math/e_exp10l.c | 13 |
1 files changed, 8 insertions, 5 deletions
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) |