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diff --git a/gmp/tests/t-popc.c b/gmp/tests/t-popc.c
new file mode 100644
index 00000000..7d0f4e0c
--- /dev/null
+++ b/gmp/tests/t-popc.c
@@ -0,0 +1,66 @@
+/* Test popc_limb.
+
+Copyright 2002 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 "gmp.h"
+#include "gmp-impl.h"
+#include "tests.h"
+
+
+int
+main (void)
+{
+  mp_limb_t  src, want, got;
+  int        i;
+
+  tests_start ();
+  mp_trace_base = -16;
+
+  for (i = 0; i < GMP_LIMB_BITS; i++)
+    {
+      src = CNST_LIMB(1) << i;
+      want = 1;
+
+      popc_limb (got, src);
+      if (got != want)
+        {
+        error:
+          printf ("popc_limb wrong result\n");
+          mpn_trace ("  src ", &src,  (mp_size_t) 1);
+          mpn_trace ("  want", &want, (mp_size_t) 1);
+          mpn_trace ("  got ", &got,  (mp_size_t) 1);
+          abort ();
+        }
+    }
+
+  for (i = 0; i < 100; i++)
+    {
+      mpn_random2 (&src, (mp_size_t) 1);
+      want = ref_popc_limb (src);
+
+      popc_limb (got, src);
+      if (got != want)
+        goto error;
+    }
+
+  tests_end ();
+  exit (0);
+}