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-rw-r--r--mpfr/tests/tui_div.c72
1 files changed, 64 insertions, 8 deletions
diff --git a/mpfr/tests/tui_div.c b/mpfr/tests/tui_div.c
index b3e812378..42b0f45b8 100644
--- a/mpfr/tests/tui_div.c
+++ b/mpfr/tests/tui_div.c
@@ -1,20 +1,20 @@
/* Test file for mpfr_ui_div.
-Copyright (C) 2000 Free Software Foundation.
+Copyright (C) 2000, 2001 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
-it under the terms of the GNU Library General Public License as published by
-the Free Software Foundation; either version 2 of the License, or (at your
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
+or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
-You should have received a copy of the GNU Library General Public License
+You should have received a copy of the GNU Lesser General Public License
along with the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
@@ -29,6 +29,7 @@ MA 02111-1307, USA. */
#endif
void check _PROTO((unsigned long, double, mp_rnd_t, double));
+void check_inexact _PROTO((void));
/* checks that y/x gives the same results in double
and with mpfr with 53 bits of precision */
@@ -51,10 +52,64 @@ void check (unsigned long y, double x, mp_rnd_t rnd_mode, double z1)
y, x, mpfr_print_rnd_mode(rnd_mode));
exit(1);
}
- mpfr_clear(xx); mpfr_clear(zz);
+ mpfr_clear(xx);
+ mpfr_clear(zz);
}
-int main(argc,argv) int argc; char *argv[];
+void
+check_inexact ()
+{
+ mpfr_t x, y, z;
+ mp_prec_t px, py;
+ int inexact, cmp;
+ unsigned long int u;
+ mp_rnd_t rnd;
+
+ mpfr_init (x);
+ mpfr_init (y);
+ mpfr_init (z);
+
+ for (px=1; px<300; px++)
+ {
+ mpfr_set_prec (x, px);
+ mpfr_random (x);
+ u = lrand48 ();
+ for (py=1; py<300; py++)
+ {
+ mpfr_set_prec (y, py);
+ mpfr_set_prec (z, py + px);
+ for (rnd=0; rnd<4; rnd++)
+ {
+ inexact = mpfr_ui_div (y, u, x, rnd);
+ if (mpfr_mul (z, y, x, rnd))
+ {
+ fprintf (stderr, "z <- y * x should be exact\n");
+ exit (1);
+ }
+ cmp = mpfr_cmp_ui (z, u);
+ if (((inexact == 0) && (cmp != 0)) ||
+ ((inexact > 0) && (cmp <= 0)) ||
+ ((inexact < 0) && (cmp >= 0)))
+ {
+ fprintf (stderr, "Wrong inexact flag for u=%lu, rnd=%s\n", u,
+ mpfr_print_rnd_mode(rnd));
+ printf ("expected %d, got %d\n", cmp, inexact);
+ printf ("x="); mpfr_print_raw (x); putchar ('\n');
+ printf ("y="); mpfr_print_raw (y); putchar ('\n');
+ printf ("y*x="); mpfr_print_raw (z); putchar ('\n');
+ exit (1);
+ }
+ }
+ }
+ }
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+ mpfr_clear (z);
+}
+
+int
+main (int argc, char *argv[])
{
#ifdef TEST
double x; unsigned long y, N; int i,rnd_mode,rnd;
@@ -79,6 +134,7 @@ int main(argc,argv) int argc; char *argv[];
}
}
#endif
+ check_inexact ();
check(1, 1.0/0.0, GMP_RNDN, 0.0);
check(1, -1.0/0.0, GMP_RNDN, -0.0);
check(1, 0.0/0.0, GMP_RNDN, 0.0/0.0);
@@ -93,6 +149,6 @@ int main(argc,argv) int argc; char *argv[];
1.3178666932321966062e285);
check(1476599377, -2.14191393656148625995e+305, GMP_RNDD,
-6.8938315017943889615e-297);
+
return 0;
}
-