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Annotation of OpenXM_contrib/gmp/mpfr/tests/tsin.c, Revision 1.1

1.1     ! ohara       1: /* Test file for mpfr_sin.
        !             2:
        !             3: Copyright 2001, 2002 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Lesser General Public License as published by
        !             9: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The MPFR Library is distributed in the hope that it will be useful, but
        !            13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Lesser General Public License
        !            18: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
        !            19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: MA 02111-1307, USA. */
        !            21:
        !            22: #include <stdio.h>
        !            23: #include <stdlib.h>
        !            24: #include <math.h>
        !            25: #include "gmp.h"
        !            26: #include "mpfr.h"
        !            27: #include "mpfr-impl.h"
        !            28: #include "mpfr-test.h"
        !            29:
        !            30: void check53 _PROTO ((double, double, mp_rnd_t));
        !            31:
        !            32: void
        !            33: check53 (double x, double sin_x, mp_rnd_t rnd_mode)
        !            34: {
        !            35:   mpfr_t xx, s;
        !            36:
        !            37:   mpfr_init2 (xx, 53);
        !            38:   mpfr_init2 (s, 53);
        !            39:   mpfr_set_d (xx, x, rnd_mode); /* should be exact */
        !            40:   mpfr_sin (s, xx, rnd_mode);
        !            41:   if (mpfr_get_d1 (s) != sin_x && (!isnan(sin_x) || !mpfr_nan_p(s)))
        !            42:     {
        !            43:       fprintf (stderr, "mpfr_sin failed for x=%1.20e, rnd=%s\n", x,
        !            44:               mpfr_print_rnd_mode (rnd_mode));
        !            45:       fprintf (stderr, "mpfr_sin gives sin(x)=%1.20e, expected %1.20e\n",
        !            46:               mpfr_get_d1 (s), sin_x);
        !            47:       exit(1);
        !            48:     }
        !            49:   mpfr_clear (xx);
        !            50:   mpfr_clear (s);
        !            51: }
        !            52:
        !            53: #define TEST_FUNCTION mpfr_sin
        !            54: #include "tgeneric.c"
        !            55:
        !            56: int
        !            57: main (int argc, char *argv[])
        !            58: {
        !            59:   mpfr_t x;
        !            60:
        !            61: #ifdef HAVE_INFS
        !            62:   check53 (DBL_NAN, DBL_NAN, GMP_RNDN);
        !            63:   check53 (DBL_POS_INF, DBL_NAN, GMP_RNDN);
        !            64:   check53 (DBL_NEG_INF, DBL_NAN, GMP_RNDN);
        !            65: #endif
        !            66:   /* worst case from PhD thesis of Vincent Lefe`vre: x=8980155785351021/2^54 */
        !            67:   check53 (4.984987858808754279e-1, 4.781075595393330379e-1, GMP_RNDN);
        !            68:   check53 (4.984987858808754279e-1, 4.781075595393329824e-1, GMP_RNDD);
        !            69:   check53 (4.984987858808754279e-1, 4.781075595393329824e-1, GMP_RNDZ);
        !            70:   check53 (4.984987858808754279e-1, 4.781075595393330379e-1, GMP_RNDU);
        !            71:   check53 (1.00031274099908640274,  8.416399183372403892e-1, GMP_RNDN);
        !            72:   check53 (1.00229256850978698523,  8.427074524447979442e-1, GMP_RNDZ);
        !            73:   check53 (1.00288304857059840103,  8.430252033025980029e-1, GMP_RNDZ);
        !            74:   check53 (1.00591265847407274059,  8.446508805292128885e-1, GMP_RNDN);
        !            75:
        !            76:   check53 (1.00591265847407274059,  8.446508805292128885e-1, GMP_RNDN);
        !            77:
        !            78:   mpfr_init2 (x, 2);
        !            79:
        !            80:   mpfr_set_d (x, 0.5, GMP_RNDN);
        !            81:   mpfr_sin (x, x, GMP_RNDD);
        !            82:   if (mpfr_get_d1 (x) != 0.375)
        !            83:     {
        !            84:       fprintf (stderr, "mpfr_sin(0.5, GMP_RNDD) failed with precision=2\n");
        !            85:       exit (1);
        !            86:     }
        !            87:
        !            88:   /* bug found by Kevin Ryde */
        !            89:   mpfr_const_pi (x, GMP_RNDN);
        !            90:   mpfr_mul_ui (x, x, 3L, GMP_RNDN);
        !            91:   mpfr_div_ui (x, x, 2L, GMP_RNDN);
        !            92:   mpfr_sin (x, x, GMP_RNDN);
        !            93:   if (mpfr_cmp_ui (x, 0) >= 0)
        !            94:     {
        !            95:       fprintf (stderr, "Error: wrong sign for sin(3*Pi/2)\n");
        !            96:       exit (1);
        !            97:     }
        !            98:
        !            99:   mpfr_clear (x);
        !           100:
        !           101:   test_generic (2, 100, 80);
        !           102:
        !           103:   return 0;
        !           104: }