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Annotation of OpenXM_contrib/gmp/mpfr/tests/tmul_ui.c, Revision 1.1.1.1

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: }