1 files changed, 132 insertions, 0 deletions
diff --git a/gnu/lib/libgmp/mpz/tests/t-gcd.c b/gnu/lib/libgmp/mpz/tests/t-gcd.c
new file mode 100644
index 00000000000..d9a78843a27
--- /dev/null
+++ b/gnu/lib/libgmp/mpz/tests/t-gcd.c
@@ -0,0 +1,132 @@
+/* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_tdiv_r, mpz_add, mpz_cmp,
+   mpz_cmp_ui, mpz_init_set, mpz_set, mpz_clear.
+
+Copyright (C) 1991, 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 mpz_refgcd (), debug_mp ();
+
+#ifndef SIZE
+#define SIZE 256 /* really needs to be this large to exercise corner cases! */
+#endif
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  mpz_t op1, op2;
+  mpz_t refgcd, gcd, s, t;
+  mpz_t temp1, temp2;
+  mp_size_t op1_size, op2_size;
+  int i;
+  int reps = 1000;
+
+  if (argc == 2)
+     reps = atoi (argv[1]);
+
+  mpz_init (op1);
+  mpz_init (op2);
+  mpz_init (refgcd);
+  mpz_init (gcd);
+  mpz_init (temp1);
+  mpz_init (temp2);
+  mpz_init (s);
+  mpz_init (t);
+
+  for (i = 0; i < reps; i++)
+    {
+      op1_size = urandom () % SIZE - SIZE/2;
+      op2_size = urandom () % SIZE - SIZE/2;
+
+      mpz_random2 (op1, op1_size);
+      mpz_random2 (op2, op2_size);
+
+      mpz_refgcd (refgcd, op1, op2);
+
+      mpz_gcd (gcd, op1, op2);
+      if (mpz_cmp (refgcd, gcd))
+	dump_abort (op1, op2);
+
+      mpz_gcdext (gcd, s, t, op1, op2);
+      if (mpz_cmp (refgcd, gcd))
+	dump_abort (op1, op2);
+
+      mpz_mul (temp1, s, op1);
+      mpz_mul (temp2, t, op2);
+      mpz_add (gcd, temp1, temp2);
+      if (mpz_cmp (refgcd, gcd))
+	dump_abort (op1, op2);
+    }
+
+  exit (0);
+}
+
+void
+mpz_refgcd (g, x, y)
+     mpz_t g;
+     mpz_t x, y;
+{
+  mpz_t xx, yy;
+
+  mpz_init (xx);
+  mpz_init (yy);
+
+  mpz_abs (xx, x);
+  mpz_abs (yy, y);
+
+  for (;;)
+    {
+      if (mpz_cmp_ui (yy, 0) == 0)
+	{
+	  mpz_set (g, xx);
+	  break;
+	}
+      mpz_tdiv_r (xx, xx, yy);
+      if (mpz_cmp_ui (xx, 0) == 0)
+	{
+	  mpz_set (g, yy);
+	  break;
+	}
+      mpz_tdiv_r (yy, yy, xx);
+    }
+
+  mpz_clear (xx);
+  mpz_clear (yy);
+}
+
+dump_abort (op1, op2)
+     mpz_t op1, op2;
+{
+  fprintf (stderr, "ERROR\n");
+  fprintf (stderr, "op1 = "); debug_mp (op1, -16);
+  fprintf (stderr, "op2 = "); debug_mp (op2, -16);
+  abort();
+}
+
+void
+debug_mp (x, base)
+     mpz_t x;
+{
+  mpz_out_str (stderr, base, x); fputc ('\n', stderr);
+}