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diff --git a/sysdeps/ieee754/dbl-64/mptan.c b/sysdeps/ieee754/dbl-64/mptan.c
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-/*
- * IBM Accurate Mathematical Library
- * written by International Business Machines Corp.
- * Copyright (C) 2001-2017 Free Software Foundation, Inc.
- *
- * This program 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.
- *
- * This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
- */
-/**********************************************************************/
-/* MODULE_NAME:mptan.c */
-/* */
-/* FUNCTION: mptan */
-/* */
-/* FILES NEEDED: endian.h mpa.h */
-/* mpa.c sincos32.c branred.c */
-/* */
-/* Multi-Precision tan() function subroutine, for p=32. It is based */
-/* on the routines mpranred() and c32(). mpranred() performs range */
-/* reduction of a double number x into a multiple precision number */
-/* y, such that y=x-n*pi/2, abs(y)<pi/4, n=0,+-1,+-2,.... c32() */
-/* computes both sin(y), cos(y). tan(x) is either sin(y)/cos(y) */
-/* or -cos(y)/sin(y). The precision of the result is of about 559 */
-/* significant bits. */
-/* */
-/**********************************************************************/
-#include "endian.h"
-#include "mpa.h"
-
-#ifndef SECTION
-# define SECTION
-#endif
-
-void
-SECTION
-__mptan (double x, mp_no *mpy, int p)
-{
- int n;
- mp_no mpw, mpc, mps;
-
- /* Negative or positive result. */
- n = __mpranred (x, &mpw, p) & 0x00000001;
- /* Computing sin(x) and cos(x). */
- __c32 (&mpw, &mpc, &mps, p);
- /* Second or fourth quarter of unit circle. */
- if (n)
- {
- __dvd (&mpc, &mps, mpy, p);
- mpy->d[0] *= -1;
- }
- /* tan is negative in this area. */
- else
- __dvd (&mps, &mpc, mpy, p);
-}