added log2p1 and compound (mpfr_compound is not finished yet)

git-svn-id: https://scm.gforge.inria.fr/anonscm/svn/mpfr/trunk@14331 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 173 insertions, 0 deletions

diff --git a/tests/tcompound.c b/tests/tcompound.c
new file mode 100644
index 000000000..4e661d519
--- /dev/null
+++ b/tests/tcompound.c
@@ -0,0 +1,173 @@
+/* Test file for mpfr_compound.
+
+Copyright 2021 Free Software Foundation, Inc.
+Contributed by the AriC and Caramba 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 3 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.LESSER.  If not, see
+https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include "mpfr-test.h"
+
+#define TEST_FUNCTION mpfr_compound
+#define INTEGER_TYPE long
+#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
+#define test_generic_ui test_generic_si
+#include "tgeneric_ui.c"
+
+/* Special cases from IEEE 754-2019 */
+static void
+check_ieee754 (void)
+{
+  mpfr_t x, y;
+  long i;
+  mpfr_prec_t prec = 2; /* we need at least 2 so that 3/4 is exact */
+
+  mpfr_init2 (x, prec);
+  mpfr_init2 (y, prec);
+
+  /* compound(x,n) = NaN for x < -1, and set invalid exception */
+  mpfr_clear_nanflag ();
+  mpfr_set_si (x, -2, MPFR_RNDN);
+  mpfr_compound (y, x, 17, MPFR_RNDN);
+  if (!mpfr_nan_p (y))
+    {
+      printf ("Error, compound(-2,17) should give NaN\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+  if (!mpfr_nanflag_p ())
+    {
+      printf ("Error, compound(-2,17) should raise invalid flag\n");
+      exit (1);
+    }
+
+  /* compound(x,0) = 1 for x >= -1 (or NaN), we choose 1 */
+  for (i = -1; i <= 2; i++)
+    {
+      if (i != 2)
+        mpfr_set_si (x, i, MPFR_RNDN);
+      else
+        mpfr_set_inf (x, 1);
+      mpfr_compound (y, x, 0, MPFR_RNDN);
+      if (mpfr_cmp_ui (y, 1) != 0)
+        {
+          mpfr_printf ("Error, compound(%Re,0) should give 1\n", x);
+          printf ("got "); mpfr_dump (y);
+          exit (1);
+        }
+    }
+
+  /* compound(-1,n) = +Inf for n < 0, and raise divide-by-zero flag */
+  mpfr_clear_divby0 ();
+  mpfr_set_si (x, -1, MPFR_RNDN);
+  mpfr_compound (y, x, -1, MPFR_RNDN);
+  if (!mpfr_inf_p (y) || MPFR_SIGN(y) < 0)
+    {
+      printf ("Error, compound(-1,-1) should give +Inf\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+  if (!mpfr_divby0_p ())
+    {
+      printf ("Error, compound(-1,-1) should raise divide-by-zero flag\n");
+      exit (1);
+    }
+
+  /* compound(-1,n) = +0 for n > 0 */
+  mpfr_set_si (x, -1, MPFR_RNDN);
+  mpfr_compound (y, x, 1, MPFR_RNDN);
+  if (!mpfr_zero_p (y) || MPFR_SIGN(y) < 0)
+    {
+      printf ("Error, compound(-1,1) should give +0\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+
+  /* compound(+/-0,n) = 1 */
+  for (i = -1; i <= 1; i++)
+    {
+      mpfr_set_zero (x, -1);
+      mpfr_compound (y, x, i, MPFR_RNDN);
+      if (mpfr_cmp_ui (y, 1) != 0)
+        {
+          mpfr_printf ("Error1, compound(%Re,%ld) should give 1\n", x, i);
+          printf ("got "); mpfr_dump (y);
+          exit (1);
+        }
+      mpfr_set_zero (x, +1);
+      mpfr_compound (y, x, i, MPFR_RNDN);
+      if (mpfr_cmp_ui (y, 1) != 0)
+        {
+          mpfr_printf ("Error, compound(%Re,%ld) should give 1\n", x, i);
+          printf ("got "); mpfr_dump (y);
+          exit (1);
+        }
+    }
+
+  /* compound(+Inf,n) = +Inf for n > 0 */
+  mpfr_set_inf (x, 1);
+  mpfr_compound (y, x, 1, MPFR_RNDN);
+  if (!mpfr_inf_p (y) || MPFR_SIGN(y) < 0)
+    {
+      printf ("Error, compound(+Inf,1) should give +Inf\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+
+  /* compound(+Inf,n) = +0 for n < 0 */
+  mpfr_set_inf (x, 1);
+  mpfr_compound (y, x, -1, MPFR_RNDN);
+  if (!mpfr_zero_p (y) || MPFR_SIGN(y) < 0)
+    {
+      printf ("Error, compound(+Inf,-1) should give +0\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+
+  /* compound(NaN,n) = NaN for n <> 0 */
+  mpfr_set_nan (x);
+  mpfr_compound (y, x, -1, MPFR_RNDN);
+  if (!mpfr_nan_p (y))
+    {
+      printf ("Error, compound(NaN,-1) should give NaN\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+  mpfr_compound (y, x, +1, MPFR_RNDN);
+  if (!mpfr_nan_p (y))
+    {
+      printf ("Error, compound(NaN,+1) should give NaN\n");
+      printf ("got "); mpfr_dump (y);
+      exit (1);
+    }
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+int
+main (void)
+{
+  tests_start_mpfr ();
+
+  check_ieee754 ();
+
+  test_generic_si (MPFR_PREC_MIN, 100, 100);
+
+  tests_end_mpfr ();
+  return 0;
+}