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diff --git a/gmp/tests/mpq/t-cmp_si.c b/gmp/tests/mpq/t-cmp_si.c
new file mode 100644
index 00000000..89b2239b
--- /dev/null
+++ b/gmp/tests/mpq/t-cmp_si.c
@@ -0,0 +1,118 @@
+/* Test mpq_cmp_si.
+
+Copyright 2001 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 Lesser 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 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "tests.h"
+
+
+#define SGN(x)   ((x)<0 ? -1 : (x) != 0)
+
+void
+check_data (void)
+{
+  static const struct {
+    const char     *q;
+    long           n;
+    unsigned long  d;
+    int            want;
+  } data[] = {
+    { "0", 0, 1, 0 },
+    { "0", 0, 123, 0 },
+    { "0", 0, ULONG_MAX, 0 },
+    { "1", 0, 1, 1 },
+    { "1", 0, 123, 1 },
+    { "1", 0, ULONG_MAX, 1 },
+    { "-1", 0, 1, -1 },
+    { "-1", 0, 123, -1 },
+    { "-1", 0, ULONG_MAX, -1 },
+
+    { "123", 123, 1, 0 },
+    { "124", 123, 1, 1 },
+    { "122", 123, 1, -1 },
+
+    { "-123", 123, 1, -1 },
+    { "-124", 123, 1, -1 },
+    { "-122", 123, 1, -1 },
+
+    { "123", -123, 1, 1 },
+    { "124", -123, 1, 1 },
+    { "122", -123, 1, 1 },
+
+    { "-123", -123, 1, 0 },
+    { "-124", -123, 1, -1 },
+    { "-122", -123, 1, 1 },
+
+    { "5/7", 3,4, -1 },
+    { "5/7", -3,4, 1 },
+    { "-5/7", 3,4, -1 },
+    { "-5/7", -3,4, 1 },
+  };
+
+  mpq_t  q;
+  int    i, got;
+
+  mpq_init (q);
+
+  for (i = 0; i < numberof (data); i++)
+    {
+      mpq_set_str_or_abort (q, data[i].q, 0);
+      MPQ_CHECK_FORMAT (q);
+
+      got = mpq_cmp_si (q, data[i].n, data[i].d);
+      if (SGN(got) != data[i].want)
+        {
+          printf ("mpq_cmp_si wrong\n");
+        error:
+          mpq_trace ("  q", q);
+          printf ("  n=%ld\n", data[i].n);
+          printf ("  d=%lu\n", data[i].d);
+          printf ("  got=%d\n", got);
+          printf ("  want=%d\n", data[i].want);
+          abort ();
+        }
+
+      if (data[i].n == 0)
+        {
+          got = mpq_cmp_si (q, 0L, data[i].d);
+          if (SGN(got) != data[i].want)
+            {
+              printf ("mpq_cmp_si wrong\n");
+              goto error;
+            }
+        }
+    }
+
+  mpq_clear (q);
+}
+
+int
+main (int argc, char **argv)
+{
+  tests_start ();
+
+  check_data ();
+
+  tests_end ();
+  exit (0);
+}