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

1.1     ! ohara       1: /* Generic test file for functions with one mpfr_t argument.
        !             2:
        !             3: Copyright 2001, 2002 Free Software Foundation.
        !             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: void test_generic _PROTO((int, int, int));
        !            23:
        !            24: void
        !            25: test_generic (int p0, int p1, int N)
        !            26: {
        !            27:   mp_prec_t prec, yprec;
        !            28:   mpfr_t x, y, z, t;
        !            29:   mp_rnd_t rnd;
        !            30:   int inexact, compare, compare2;
        !            31:   unsigned int n;
        !            32:
        !            33:   mpfr_init (x);
        !            34:   mpfr_init (y);
        !            35:   mpfr_init (z);
        !            36:   mpfr_init (t);
        !            37:
        !            38:   /* generic test */
        !            39:   for (prec = p0; prec <= p1; prec++)
        !            40:     {
        !            41:       mpfr_set_prec (x, prec);
        !            42:       mpfr_set_prec (z, prec);
        !            43:       mpfr_set_prec (t, prec);
        !            44:       yprec = prec + 10;
        !            45:
        !            46:       for (n=0; n<N; n++)
        !            47:        {
        !            48: #if defined(RAND_FUNCTION)
        !            49:          RAND_FUNCTION (x);
        !            50: #else
        !            51:          mpfr_random (x);
        !            52: #endif
        !            53:          rnd = random () % 4;
        !            54:          mpfr_set_prec (y, yprec);
        !            55:          compare = TEST_FUNCTION (y, x, rnd);
        !            56:          if (mpfr_can_round (y, yprec, rnd, rnd, prec))
        !            57:            {
        !            58:              mpfr_set (t, y, rnd);
        !            59:              inexact = TEST_FUNCTION (z, x, rnd);
        !            60:              if (mpfr_cmp (t, z))
        !            61:                {
        !            62:                  printf ("results differ for x=");
        !            63:                  mpfr_out_str (stdout, 2, prec, x, GMP_RNDN);
        !            64:                  printf (" prec=%u rnd_mode=%s\n", (unsigned) prec,
        !            65:                          mpfr_print_rnd_mode (rnd));
        !            66:                  printf ("got      ");
        !            67:                  mpfr_out_str (stdout, 2, prec, z, GMP_RNDN);
        !            68:                  putchar ('\n');
        !            69:                  printf ("expected ");
        !            70:                  mpfr_out_str (stdout, 2, prec, t, GMP_RNDN);
        !            71:                  putchar ('\n');
        !            72:                  printf ("approx  ");
        !            73:                  mpfr_print_binary (y);
        !            74:                  putchar ('\n');
        !            75:                  exit (1);
        !            76:                }
        !            77:              compare2 = mpfr_cmp (t, y);
        !            78:              /* if rounding to nearest, cannot know the sign of t - f(x)
        !            79:                 because of composed rounding: y = o(f(x)) and t = o(y) */
        !            80:              if ((rnd != GMP_RNDN) && (compare * compare2 >= 0))
        !            81:                compare = compare + compare2;
        !            82:              else
        !            83:                compare = inexact; /* cannot determine sign(t-f(x)) */
        !            84:              if (((inexact == 0) && (compare != 0)) ||
        !            85:                  ((inexact > 0) && (compare <= 0)) ||
        !            86:                  ((inexact < 0) && (compare >= 0)))
        !            87:                {
        !            88:                  fprintf (stderr, "Wrong inexact flag for rnd=%s: expected %d, got %d\n",
        !            89:                           mpfr_print_rnd_mode (rnd), compare, inexact);
        !            90:                  printf ("x="); mpfr_print_binary (x); putchar ('\n');
        !            91:                  printf ("y="); mpfr_print_binary (y); putchar ('\n');
        !            92:                  printf ("t="); mpfr_print_binary (t); putchar ('\n');
        !            93:                  exit (1);
        !            94:                }
        !            95:            }
        !            96:        }
        !            97:     }
        !            98:
        !            99:   mpfr_clear (x);
        !           100:   mpfr_clear (y);
        !           101:   mpfr_clear (z);
        !           102:   mpfr_clear (t);
        !           103: }