diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/mptan.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/mptan.c | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/sysdeps/ieee754/dbl-64/mptan.c b/sysdeps/ieee754/dbl-64/mptan.c deleted file mode 100644 index 6976028f8f..0000000000 --- a/sysdeps/ieee754/dbl-64/mptan.c +++ /dev/null @@ -1,63 +0,0 @@ -/* - * 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); -} |