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-rw-r--r--sysdeps/ieee754/isinf.c40
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diff --git a/sysdeps/ieee754/isinf.c b/sysdeps/ieee754/isinf.c
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--- a/sysdeps/ieee754/isinf.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
-
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
-
-#include <ansidecl.h>
-#include <math.h>
-#include "ieee754.h"
-
-/* Return 0 if VALUE is finite or NaN, +1 if it
-   is +Infinity, -1 if it is -Infinity.  */
-int
-DEFUN(__isinf, (value), double value)
-{
-  union ieee754_double u;
-
-  u.d = value;
-  /* An IEEE 754 infinity has an exponent with the
-     maximum possible value and a zero mantissa.  */
-  if ((u.ieee.exponent & 0x7ff) == 0x7ff &&
-      u.ieee.mantissa0 == 0 && u.ieee.mantissa1 == 0)
-    return u.ieee.negative ? -1 : 1;
-
-  return 0;
-}
-
-weak_alias (__isinf, isinf)