1 files changed, 118 insertions, 0 deletions
diff --git a/contrib/libgmp/mpz/tests/t-fdiv.c b/contrib/libgmp/mpz/tests/t-fdiv.c
new file mode 100644
index 0000000..9de22d7
--- /dev/null
+++ b/contrib/libgmp/mpz/tests/t-fdiv.c
@@ -0,0 +1,118 @@
+/* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_fdiv_qr, mpz_fdiv_q,
+   mpz_fdiv_r, mpz_mul.
+
+Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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
+option) any later version.
+
+The GNU MP 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
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP 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. */
+
+#include <stdio.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "urandom.h"
+
+void debug_mp ();
+
+#ifndef SIZE
+#define SIZE 16
+#endif
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  mpz_t dividend, divisor;
+  mpz_t quotient, remainder;
+  mpz_t quotient2, remainder2;
+  mpz_t temp;
+  mp_size_t dividend_size, divisor_size;
+  int i;
+  int reps = 100000;
+
+  if (argc == 2)
+     reps = atoi (argv[1]);
+
+  mpz_init (dividend);
+  mpz_init (divisor);
+  mpz_init (quotient);
+  mpz_init (remainder);
+  mpz_init (quotient2);
+  mpz_init (remainder2);
+  mpz_init (temp);
+
+  for (i = 0; i < reps; i++)
+    {
+      dividend_size = urandom () % SIZE - SIZE/2;
+      mpz_random2 (dividend, dividend_size);
+
+      divisor_size = urandom () % SIZE - SIZE/2;
+      mpz_random2 (divisor, divisor_size);
+      if (mpz_cmp_ui (divisor, 0) == 0)
+	continue;
+
+      mpz_fdiv_qr (quotient, remainder, dividend, divisor);
+      mpz_fdiv_q (quotient2, dividend, divisor);
+      mpz_fdiv_r (remainder2, dividend, divisor);
+
+      /* First determine that the quotients and remainders computed
+	 with different functions are equal.  */
+      if (mpz_cmp (quotient, quotient2) != 0)
+	dump_abort (dividend, divisor);
+      if (mpz_cmp (remainder, remainder2) != 0)
+	dump_abort (dividend, divisor);
+
+      /* Check if the sign of the quotient is correct.  */
+      if (mpz_cmp_ui (quotient, 0) != 0)
+	if ((mpz_cmp_ui (quotient, 0) < 0)
+	    != ((mpz_cmp_ui (dividend, 0) ^ mpz_cmp_ui (divisor, 0)) < 0))
+	dump_abort (dividend, divisor);
+
+      /* Check if the remainder has the same sign as the divisor
+	 (quotient rounded towards minus infinity).  */
+      if (mpz_cmp_ui (remainder, 0) != 0)
+	if ((mpz_cmp_ui (remainder, 0) < 0) != (mpz_cmp_ui (divisor, 0) < 0))
+	  dump_abort (dividend, divisor);
+
+      mpz_mul (temp, quotient, divisor);
+      mpz_add (temp, temp, remainder);
+      if (mpz_cmp (temp, dividend) != 0)
+	dump_abort (dividend, divisor);
+
+      mpz_abs (temp, divisor);
+      mpz_abs (remainder, remainder);
+      if (mpz_cmp (remainder, temp) >= 0)
+	dump_abort (dividend, divisor);
+    }
+
+  exit (0);
+}
+
+dump_abort (dividend, divisor)
+     mpz_t dividend, divisor;
+{
+  fprintf (stderr, "ERROR\n");
+  fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
+  fprintf (stderr, "divisor  = "); debug_mp (divisor, -16);
+  abort();
+}
+
+void
+debug_mp (x, base)
+     mpz_t x;
+{
+  mpz_out_str (stderr, base, x); fputc ('\n', stderr);
+}