Imported gcc-4.4.3

[msp430-gcc.git] / mpfr / tests / texpm1.c

diff --git a/mpfr/tests/texpm1.c b/mpfr/tests/texpm1.c
new file mode 100644 (file)
index 0000000..efffcc1
--- /dev/null
+++ b/mpfr/tests/texpm1.c
@@ -0,0 +1,173 @@
+/* Test file for mpfr_expm1.
+
+Copyright 2001, 2002, 2003, 2004, 2005, 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"
+
+#ifdef CHECK_EXTERNAL
+static int
+test_expm1 (mpfr_ptr a, mpfr_srcptr b, mp_rnd_t rnd_mode)
+{
+  int res;
+  int ok = rnd_mode == GMP_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53;
+  if (ok)
+    {
+      mpfr_print_raw (b);
+    }
+  res = mpfr_expm1 (a, b, rnd_mode);
+  if (ok)
+    {
+      printf (" ");
+      mpfr_print_raw (a);
+      printf ("\n");
+    }
+  return res;
+}
+#else
+#define test_expm1 mpfr_expm1
+#endif
+
+#define TEST_FUNCTION test_expm1
+#define TEST_RANDOM_EMIN -36
+#define TEST_RANDOM_EMAX 36
+#include "tgeneric.c"
+
+static void
+special (void)
+{
+  mpfr_t x, y;
+  int i;
+
+  mpfr_init (x);
+  mpfr_init (y);
+
+  mpfr_set_nan (x);
+  test_expm1 (y, x, GMP_RNDN);
+  if (!mpfr_nan_p (y))
+    {
+      printf ("Error for expm1(NaN)\n");
+      exit (1);
+    }
+
+  mpfr_set_inf (x, 1);
+  test_expm1 (y, x, GMP_RNDN);
+  if (!mpfr_inf_p (y) || mpfr_sgn (y) < 0)
+    {
+      printf ("Error for expm1(+Inf)\n");
+      exit (1);
+    }
+
+  mpfr_set_inf (x, -1);
+  test_expm1 (y, x, GMP_RNDN);
+  if (mpfr_cmp_si (y, -1))
+    {
+      printf ("Error for expm1(-Inf)\n");
+      exit (1);
+    }
+
+  mpfr_set_ui (x, 0, GMP_RNDN);
+  test_expm1 (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui (y, 0) || mpfr_sgn (y) < 0)
+    {
+      printf ("Error for expm1(+0)\n");
+      exit (1);
+    }
+
+  mpfr_neg (x, x, GMP_RNDN);
+  test_expm1 (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui (y, 0) || mpfr_sgn (y) > 0)
+    {
+      printf ("Error for expm1(-0)\n");
+      exit (1);
+    }
+
+  /* Check overflow of expm1(x) */
+  mpfr_clear_flags ();
+  mpfr_set_str_binary (x, "1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+  MPFR_ASSERTN (mpfr_overflow_p ());
+  MPFR_ASSERTN (i == 1);
+
+  mpfr_clear_flags ();
+  mpfr_set_str_binary (x, "1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDU);
+  MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+  MPFR_ASSERTN (mpfr_overflow_p ());
+  MPFR_ASSERTN (i == 1);
+
+  mpfr_clear_flags ();
+  mpfr_set_str_binary (x, "1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDD);
+  MPFR_ASSERTN (!MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+  MPFR_ASSERTN (mpfr_overflow_p ());
+  MPFR_ASSERTN (i == -1);
+
+  /* Check internal underflow of expm1 (x) */
+  mpfr_set_prec (x, 2);
+  mpfr_clear_flags ();
+  mpfr_set_str_binary (x, "-1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_cmp_si (x, -1) == 0);
+  MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ());
+  MPFR_ASSERTN (i == -1);
+
+  mpfr_set_str_binary (x, "-1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDD);
+  MPFR_ASSERTN (mpfr_cmp_si (x, -1) == 0);
+  MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ());
+  MPFR_ASSERTN (i == -1);
+
+  mpfr_set_str_binary (x, "-1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDZ);
+  MPFR_ASSERTN (mpfr_cmp_str (x, "-0.11", 2, GMP_RNDN) == 0);
+  MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ());
+  MPFR_ASSERTN (i == 1);
+
+  mpfr_set_str_binary (x, "-1.1E1000000000");
+  i = test_expm1 (x, x, GMP_RNDU);
+  MPFR_ASSERTN (mpfr_cmp_str (x, "-0.11", 2, GMP_RNDN) == 0);
+  MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ());
+  MPFR_ASSERTN (i == 1);
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+int
+main (int argc, char *argv[])
+{
+  tests_start_mpfr ();
+
+  special ();
+
+  test_generic (2, 100, 100);
+
+  data_check ("data/expm1", mpfr_expm1, "mpfr_expm1");
+  bad_cases (mpfr_expm1, mpfr_log1p, "mpfr_expm1", 256, -256, 255,
+             4, 128, 800, 40);
+
+  tests_end_mpfr ();
+  return 0;
+}