1 files changed, 87 insertions, 0 deletions
diff --git a/gmp-6.3.0/mini-gmp/tests/t-powm.c b/gmp-6.3.0/mini-gmp/tests/t-powm.c
new file mode 100644
index 0000000..1cce9b5
--- /dev/null
+++ b/gmp-6.3.0/mini-gmp/tests/t-powm.c
@@ -0,0 +1,87 @@
+/*
+
+Copyright 2012, 2022, Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library test suite.
+
+The GNU MP Library test suite is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 3 of the License,
+or (at your option) any later version.
+
+The GNU MP Library test suite 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 General
+Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
+
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "testutils.h"
+
+#define MAXBITS 400
+#define COUNT 1000
+
+void
+testmain (int argc, char **argv)
+{
+  unsigned i;
+  mpz_t b, e, m, res, ref;
+
+  mpz_init (b);
+  mpz_init (e);
+  mpz_init (m);
+  mpz_init (res);
+  mpz_init (ref);
+
+  for (i = 0; i < COUNT; i++)
+    {
+      mini_random_op4 (OP_POWM, MAXBITS, b, e, m, ref);
+      mpz_powm (res, b, e, m);
+      if (mpz_cmp (res, ref))
+	{
+	  fprintf (stderr, "mpz_powm failed:\n");
+	  dump ("b", b);
+	  dump ("e", e);
+	  dump ("m", m);
+	  dump ("r", res);
+	  dump ("ref", ref);
+	  abort ();
+	}
+    }
+
+  /* res >= 0, come from the random choices above, */
+  if (mpz_cmp_ui (res, 1) <= 0) /* if too small, */
+    mpz_add_ui (res, res, 9); /* add an arbitrary value. */
+
+  mpz_set_ui (e, 0);
+  /* Test the case m^0 (mod m), expect 1 (m is greater than 1). */
+  mpz_powm (res, res, e, res);
+  if (mpz_cmp_ui (res, 1) != 0)
+    {
+      fprintf (stderr, "mpz_powm failed: b=m, e=0; 1 expected,\n");
+      dump ("m", res);
+      dump ("r", res);
+      abort ();
+    }
+
+  /* Now res is 1. */
+  /* Test the case 1^0 (mod 1), expect 0. */
+  mpz_powm (res, res, e, res);
+  if (mpz_size (res))
+    {
+      fprintf (stderr, "mpz_powm failed: b=1, e=0, m=1; 0 expected,\n");
+      dump ("r", res);
+      abort ();
+    }
+
+  mpz_clear (b);
+  mpz_clear (e);
+  mpz_clear (m);
+  mpz_clear (res);
+  mpz_clear (ref);
+}