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

1.1     ! ohara       1: /* Test file for mpfr_cos.
        !             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 cos_x, mp_rnd_t rnd_mode)
        !            34: {
        !            35:   mpfr_t xx, c;
        !            36:
        !            37:   mpfr_init2 (xx, 53);
        !            38:   mpfr_init2 (c, 53);
        !            39:   mpfr_set_d (xx, x, rnd_mode); /* should be exact */
        !            40:   mpfr_cos (c, xx, rnd_mode);
        !            41:   if (mpfr_get_d1 (c) != cos_x && (!isnan(cos_x) || !mpfr_nan_p(c)))
        !            42:     {
        !            43:       fprintf (stderr, "mpfr_cos failed for x=%1.20e, rnd=%s\n", x,
        !            44:               mpfr_print_rnd_mode (rnd_mode));
        !            45:       fprintf (stderr, "mpfr_cos gives cos(x)=%1.20e, expected %1.20e\n",
        !            46:               mpfr_get_d1 (c), cos_x);
        !            47:       exit (1);
        !            48:     }
        !            49:   mpfr_clear (xx);
        !            50:   mpfr_clear (c);
        !            51: }
        !            52:
        !            53: #define TEST_FUNCTION mpfr_cos
        !            54: #include "tgeneric.c"
        !            55:
        !            56: int
        !            57: main (int argc, char *argv[])
        !            58: {
        !            59:   mpfr_t x, y;
        !            60:
        !            61:   mpfr_init (x);
        !            62:   mpfr_init (y);
        !            63:
        !            64:   mpfr_set_prec (x, 53);
        !            65:   mpfr_set_prec (y, 2);
        !            66:   mpfr_set_d (x, 9.81333845856942e-1, GMP_RNDN);
        !            67:   mpfr_cos (y, x, GMP_RNDN);
        !            68:
        !            69:   mpfr_set_prec (x, 30);
        !            70:   mpfr_set_prec (y, 30);
        !            71:   mpfr_set_str_raw (x, "1.00001010001101110010100010101e-1");
        !            72:   mpfr_cos (y, x, GMP_RNDU);
        !            73:   mpfr_set_str_raw (x, "1.10111100010101011110101010100e-1");
        !            74:   if (mpfr_cmp (y, x))
        !            75:     {
        !            76:       fprintf (stderr, "Error for prec=30, rnd=GMP_RNDU\n");
        !            77:       printf ("expected "); mpfr_print_binary (x); putchar ('\n');
        !            78:       printf ("     got "); mpfr_print_binary (y); putchar ('\n');
        !            79:       exit (1);
        !            80:     }
        !            81:
        !            82:   mpfr_set_prec (x, 59);
        !            83:   mpfr_set_prec (y, 59);
        !            84:   mpfr_set_str_raw (x, "1.01101011101111010011111110111111111011011101100111100011e-3");
        !            85:   mpfr_cos (y, x, GMP_RNDU);
        !            86:   mpfr_set_str_raw (x, "1.1111011111110010001001001011100111101110100010000010010011e-1");
        !            87:   if (mpfr_cmp (y, x))
        !            88:     {
        !            89:       fprintf (stderr, "Error for prec=59, rnd=GMP_RNDU\n");
        !            90:       printf ("expected "); mpfr_print_binary (x); putchar ('\n');
        !            91:       printf ("     got "); mpfr_print_binary (y); putchar ('\n');
        !            92:       exit (1);
        !            93:     }
        !            94:
        !            95:   mpfr_set_prec (x, 5);
        !            96:   mpfr_set_prec (y, 5);
        !            97:   mpfr_set_str_raw (x, "1.1100e-2");
        !            98:   mpfr_cos (y, x, GMP_RNDD);
        !            99:   mpfr_set_str_raw (x, "1.1100e-1");
        !           100:   if (mpfr_cmp (y, x))
        !           101:     {
        !           102:       fprintf (stderr, "Error for x=1.1100e-2, rnd=GMP_RNDD\n");
        !           103:       printf ("expected 1.1100e-1, got "); mpfr_print_binary (y); putchar ('\n');
        !           104:       exit (1);
        !           105:     }
        !           106:
        !           107: #ifdef HAVE_INFS
        !           108:   check53 (DBL_NAN, DBL_NAN, GMP_RNDN);
        !           109:   check53 (DBL_POS_INF, DBL_NAN, GMP_RNDN);
        !           110:   check53 (DBL_NEG_INF, DBL_NAN, GMP_RNDN);
        !           111: #endif
        !           112:
        !           113:   /* worst case from PhD thesis of Vincent Lefe`vre: x=8980155785351021/2^54 */
        !           114:   check53 (4.984987858808754279e-1, 8.783012931285841817e-1, GMP_RNDN);
        !           115:   check53 (4.984987858808754279e-1, 8.783012931285840707e-1, GMP_RNDD);
        !           116:   check53 (4.984987858808754279e-1, 8.783012931285840707e-1, GMP_RNDZ);
        !           117:   check53 (4.984987858808754279e-1, 8.783012931285841817e-1, GMP_RNDU);
        !           118:   check53 (1.00031274099908640274,  0.540039116973283217504, GMP_RNDN);
        !           119:   check53 (1.00229256850978698523,  0.538371757797526551137, GMP_RNDZ);
        !           120:   check53 (1.00288304857059840103,  0.537874062022526966409, GMP_RNDZ);
        !           121:   check53 (1.00591265847407274059,  0.53531755997839769456,  GMP_RNDN);
        !           122:
        !           123:   check53 (1.00591265847407274059, 0.53531755997839769456,  GMP_RNDN);
        !           124:
        !           125:   test_generic (2, 100, 100);
        !           126:
        !           127:   mpfr_clear (x);
        !           128:   mpfr_clear (y);
        !           129:
        !           130:   return 0;
        !           131: }