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Annotation of OpenXM_contrib/gmp/mpfr/tests/tcmp2.c, Revision 1.1.1.1

1.1       maekawa     1: /* Test file for mpfr_cmp2.
                      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 <math.h>
                     25: #include "gmp.h"
                     26: #include "longlong.h"
                     27: #include "mpfr.h"
                     28: #include "mpfr-impl.h"
                     29: #ifdef IRIX64
                     30: #include <sys/fpu.h>
                     31: #endif
                     32:
                     33: extern int isnan();
                     34:
                     35: void tcmp2(x, y, i) double x, y; int i;
                     36: {
                     37:   mpfr_t xx,yy; int j;
                     38:
                     39:   if (i==-1) {
                     40:     if (x==y) i=53;
                     41:     else i = (int) floor(log(x)/log(2.0)) - (int) floor(log(x-y)/log(2.0));
                     42:   }
                     43:   mpfr_init2(xx, 53); mpfr_init2(yy, 53);
                     44:   mpfr_set_d(xx, x, 0);
                     45:   mpfr_set_d(yy, y, 0);
                     46:   if ((j=mpfr_cmp2(xx, yy)) != i) {
                     47:     printf("Error in mpfr_cmp2: x=%1.20e y=%1.20e mpfr_cmp2(x,y)=%d instead of %d\n",x,y,j,i);
                     48:     exit(1);
                     49:   }
                     50:   mpfr_set_prec(xx, 127); mpfr_set_prec(yy, 127);
                     51:   mpfr_set_str_raw(xx, "0.1011010000110111111000000101011110110001000101101011011110010010011110010000101101000010011001100110010000000010110000101000101E6");
                     52:   mpfr_set_str_raw(yy, "0.1011010000110111111000000101011011111100011101000011001111000010100010100110110100110010011001100110010000110010010110000010110E6");
                     53:   if ((j=mpfr_cmp2(xx, yy)) != 32) {
                     54:     printf("Error in mpfr_cmp2:\n");
                     55:     printf("x="); mpfr_print_raw(xx); putchar('\n');
                     56:     printf("y="); mpfr_print_raw(yy); putchar('\n');
                     57:     printf("got %d, expected 32\n", j);
                     58:     exit(1);
                     59:   }
                     60:   mpfr_clear(xx); mpfr_clear(yy);
                     61: }
                     62:
                     63: int main()
                     64: {
                     65:   int i,j; double x=1.0, y, z;
                     66: #ifdef IRIX64
                     67:     /* to get denormalized numbers on IRIX64 */
                     68:     union fpc_csr exp;
                     69:     exp.fc_word = get_fpc_csr();
                     70:     exp.fc_struct.flush = 0;
                     71:     set_fpc_csr(exp.fc_word);
                     72: #endif
                     73:
                     74:   tcmp2(1.06022698059744327881e+71, 1.05824655795525779205e+71, -1);
                     75:   tcmp2(1.0, 1.0, 53);
                     76:   for (i=0;i<54;i++) {
                     77:     tcmp2(1.0, 1.0-x, i);
                     78:     x /= 2.0;
                     79:   }
                     80:   for (j=0;j<1000000;j++) {
                     81:     x = drand48();
                     82:     y = drand48();
                     83:     if (x<y) { z=x; x=y; y=z; }
                     84:     if (y != 0.0 && y != -0.0) tcmp2(x, y, -1);
                     85:   }
                     86:   exit (0);
                     87: }
                     88: