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diff --git a/math/multc3.c b/math/multc3.c
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-/* Copyright (C) 2005, 2006 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Richard Henderson <rth@redhat.com>, 2005.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <stdbool.h>
-#include <math.h>
-#include <complex.h>
-
-attribute_hidden
-long double _Complex
-__multc3 (long double a, long double b, long double c, long double d)
-{
-  long double ac, bd, ad, bc, x, y;
-
-  ac = a * c;
-  bd = b * d;
-  ad = a * d;
-  bc = b * c;
-
-  x = ac - bd;
-  y = ad + bc;
-
-  if (isnan (x) && isnan (y))
-    {
-      /* Recover infinities that computed as NaN + iNaN.  */
-      bool recalc = 0;
-      if (isinf (a) || isinf (b))
-	{
-	  /* z is infinite.  "Box" the infinity and change NaNs in
-	     the other factor to 0.  */
-	  a = __copysignl (isinf (a) ? 1 : 0, a);
-	  b = __copysignl (isinf (b) ? 1 : 0, b);
-	  if (isnan (c)) c = __copysignl (0, c);
-	  if (isnan (d)) d = __copysignl (0, d);
-	  recalc = 1;
-	}
-     if (isinf (c) || isinf (d))
-	{
-	  /* w is infinite.  "Box" the infinity and change NaNs in
-	     the other factor to 0.  */
-	  c = __copysignl (isinf (c) ? 1 : 0, c);
-	  d = __copysignl (isinf (d) ? 1 : 0, d);
-	  if (isnan (a)) a = __copysignl (0, a);
-	  if (isnan (b)) b = __copysignl (0, b);
-	  recalc = 1;
-	}
-     if (!recalc
-	  && (isinf (ac) || isinf (bd) || isinf (ad) || isinf (bc)))
-	{
-	  /* Recover infinities from overflow by changing NaNs to 0.  */
-	  if (isnan (a)) a = __copysignl (0, a);
-	  if (isnan (b)) b = __copysignl (0, b);
-	  if (isnan (c)) c = __copysignl (0, c);
-	  if (isnan (d)) d = __copysignl (0, d);
-	  recalc = 1;
-	}
-      if (recalc)
-	{
-	  x = INFINITY * (a * c - b * d);
-	  y = INFINITY * (a * d + b * c);
-	}
-    }
-
-  return x + I * y;
-}