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

1.1     ! maekawa     1: /* Test file for mpfr_mul_ui.
        !             2:
        !             3: Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
        !             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 Library General Public License as published by
        !             9: the Free Software Foundation; either version 2 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 Library General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Library 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 "gmp.h"
        !            25: #include "gmp-impl.h"
        !            26: #include "mpfr.h"
        !            27: #include "time.h"
        !            28:
        !            29: int
        !            30: main(int argc, char **argv)
        !            31: {
        !            32:   mpfr_t x, y;
        !            33:
        !            34:   mpfr_init2(x, 53); mpfr_init2(y, 53);
        !            35:
        !            36:   /* checks that result is normalized */
        !            37:   mpfr_set_d(y, 6.93147180559945286227e-01, GMP_RNDZ);
        !            38:   mpfr_mul_ui(x, y, 1, GMP_RNDZ);
        !            39:   if (MANT(x)[PREC(x)/BITS_PER_MP_LIMB] >> (BITS_PER_MP_LIMB-1) == 0) {
        !            40:     fprintf(stderr, "Error in mpfr_mul_ui: result not normalized\n");
        !            41:     exit(1);
        !            42:   }
        !            43:   if (mpfr_cmp(x,y)) {
        !            44:     fprintf(stderr, "Error in mpfr_mul_ui: 1*y != y\n");
        !            45:     printf("y=  "); mpfr_print_raw(y); putchar('\n');
        !            46:     printf("1*y="); mpfr_print_raw(x); putchar('\n');
        !            47:     exit(1);
        !            48:   }
        !            49:
        !            50:   mpfr_set_d(x, 1.0/3.0, GMP_RNDZ);
        !            51:   mpfr_mul_ui(x, x, 3, GMP_RNDU);
        !            52:   if (mpfr_get_d(x) != 1.0) {
        !            53:     fprintf(stderr, "Error in mpfr_mul_ui: U(Z(1/3)*3) does not give 1\n"); exit(1);
        !            54:   }
        !            55:
        !            56:   /* checks sign is correct */
        !            57:   mpfr_set_d(x, -2.0, GMP_RNDZ);
        !            58:   mpfr_set_d(y, 3.0, GMP_RNDZ);
        !            59:   mpfr_mul_ui(x, y, 4, GMP_RNDZ);
        !            60:   if (SIGN(x) != 1) {
        !            61:     fprintf(stderr, "Error in mpfr_mul_ui: 4*3.0 does not give a positive result\n"); exit(1);
        !            62:   }
        !            63:
        !            64:   mpfr_clear(x); mpfr_clear(y);
        !            65:   exit (0);
        !            66: }