Imported gcc-4.4.3

[msp430-gcc.git] / gmp / tests / mpn / t-scan.c

diff --git a/gmp/tests/mpn/t-scan.c b/gmp/tests/mpn/t-scan.c
new file mode 100644 (file)
index 0000000..fc8d3cc
--- /dev/null
+++ b/gmp/tests/mpn/t-scan.c
@@ -0,0 +1,145 @@
+/* Test mpn_scan0 and mpn_scan1.
+
+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"
+
+
+#define SIZE  ((mp_size_t) 3)
+mp_limb_t  x[SIZE+1];
+
+void
+check (void)
+{
+  unsigned long  i, got, want;
+
+  x[SIZE] = 1;
+  for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
+    {
+      got = refmpn_scan1 (x, i);
+      want = mpn_scan1 (x, i);
+      if (got != want)
+        {
+          printf ("mpn_scan1\n");
+          printf ("  i     %lu\n", i);
+          printf ("  got   %lu\n", got);
+          printf ("  want  %lu\n", want);
+          mpn_trace ("  x    ", x, SIZE);
+          abort ();
+        }
+    }
+
+  x[SIZE] = 0;
+  for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
+    {
+      got = refmpn_scan0 (x, i);
+      want = mpn_scan0 (x, i);
+      if (got != want)
+        {
+          printf ("mpn_scan0\n");
+          printf ("  i     %lu\n", i);
+          printf ("  got   %lu\n", got);
+          printf ("  want  %lu\n", want);
+          mpn_trace ("  x    ", x, SIZE);
+          abort ();
+        }
+    }
+}
+
+void
+check_twobits (void)
+{
+#define TWOBITS(a, b) \
+  ((CNST_LIMB(1) << (a)) | (CNST_LIMB(1) << (b)))
+
+  refmpn_zero (x, SIZE);
+  x[0] = TWOBITS (1, 0);
+  check ();
+
+  refmpn_zero (x, SIZE);
+  x[0] = TWOBITS (GMP_NUMB_BITS-1, 1);
+  check ();
+
+  refmpn_zero (x, SIZE);
+  x[0] = CNST_LIMB(1);
+  x[1] = CNST_LIMB(1);
+  check ();
+
+  refmpn_zero (x, SIZE);
+  x[0] = CNST_LIMB(1) << (GMP_NUMB_BITS-1);
+  x[1] = CNST_LIMB(1);
+  check ();
+
+  refmpn_zero (x, SIZE);
+  x[1] = TWOBITS (1, 0);
+  check ();
+
+  refmpn_zero (x, SIZE);
+  x[1] = CNST_LIMB(1);
+  x[2] = CNST_LIMB(1);
+  check ();
+}
+
+/* This is unused, it takes too long, especially on 64-bit systems. */
+void
+check_twobits_exhaustive (void)
+{
+  unsigned long  i, j;
+
+  for (i = 0; i < GMP_NUMB_BITS * SIZE; i++)
+    {
+      for (j = 0; j < GMP_NUMB_BITS * SIZE; j++)
+        {
+          refmpn_zero (x, SIZE);
+          refmpn_setbit (x, i);
+          refmpn_setbit (x, j);
+          check ();
+        }
+    }
+}
+
+void
+check_rand (void)
+{
+  int  i;
+
+  for (i = 0; i < 100; i++)
+    {
+      refmpn_random2 (x, SIZE);
+      check ();
+    }
+}
+
+int
+main (void)
+{
+  mp_trace_base = -16;
+  tests_start ();
+
+  check_twobits ();
+  check_rand ();
+
+  tests_end ();
+  exit (0);
+}