Imported gcc-4.4.3

[msp430-gcc.git] / mpfr / tests / tlog2.c

diff --git a/mpfr/tests/tlog2.c b/mpfr/tests/tlog2.c
new file mode 100644 (file)
index 0000000..1c634b5
--- /dev/null
+++ b/mpfr/tests/tlog2.c
@@ -0,0 +1,84 @@
+/* Test file for mpfr_log2.
+
+Copyright 2001, 2002, 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 2.1 of the License, or (at your
+option) any later version.
+
+The GNU MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mpfr-test.h"
+
+#define TEST_FUNCTION mpfr_log2
+#define TEST_RANDOM_POS 8
+#include "tgeneric.c"
+
+static void
+special (void)
+{
+  mpfr_t x;
+  int inex;
+
+  mpfr_init (x);
+
+  mpfr_set_nan (x);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
+
+  mpfr_set_inf (x, -1);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
+
+  mpfr_set_inf (x, 1);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0);
+
+  mpfr_set_ui (x, 0, GMP_RNDN);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
+  mpfr_set_ui (x, 0, GMP_RNDN);
+  mpfr_neg (x, x, GMP_RNDN);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
+
+  mpfr_set_si (x, -1, GMP_RNDN);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
+
+  mpfr_set_si (x, 1, GMP_RNDN);
+  inex = mpfr_log2 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x) && inex == 0);
+
+  mpfr_clear (x);
+}
+
+int
+main (int argc, char *argv[])
+{
+  tests_start_mpfr ();
+
+  special ();
+
+  test_generic (2, 100, 30);
+
+  data_check ("data/log2", mpfr_log2, "mpfr_log2");
+
+  tests_end_mpfr ();
+  return 0;
+}