X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=mpfr%2Ftests%2Ftexp2.c;fp=mpfr%2Ftests%2Ftexp2.c;h=f3c569c799cca7cc82f0b9255c121601e1ae527c;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git

diff --git a/mpfr/tests/texp2.c b/mpfr/tests/texp2.c
new file mode 100644
index 00000000..f3c569c7
--- /dev/null
+++ b/mpfr/tests/texp2.c
@@ -0,0 +1,379 @@
+/* Test file for mpfr_exp2.
+
+Copyright 2001, 2002, 2003, 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 <limits.h>
+
+#include "mpfr-test.h"
+
+#define TEST_FUNCTION mpfr_exp2
+#define TEST_RANDOM_EMIN -36
+#define TEST_RANDOM_EMAX 36
+#include "tgeneric.c"
+
+static void
+special_overflow (void)
+{
+  mpfr_t x, y;
+  int inex;
+  mp_exp_t emin, emax;
+
+  emin = mpfr_get_emin ();
+  emax = mpfr_get_emax ();
+
+  set_emin (-125);
+  set_emax (128);
+
+  mpfr_init2 (x, 24);
+  mpfr_init2 (y, 24);
+
+  mpfr_set_str_binary (x, "0.101100100000000000110100E15");
+  inex = mpfr_exp2 (y, x, GMP_RNDN);
+  if (!mpfr_inf_p (y) || inex <= 0)
+    {
+      printf ("Overflow error.\n");
+      mpfr_dump (y);
+      printf ("inex = %d\n", inex);
+      exit (1);
+    }
+
+  mpfr_clear (y);
+  mpfr_clear (x);
+  set_emin (emin);
+  set_emax (emax);
+}
+
+static void
+emax_m_eps (void)
+{
+  if (mpfr_get_emax () <= LONG_MAX)
+    {
+      mpfr_t x, y;
+      int inex, ov;
+
+      mpfr_init2 (x, sizeof(mp_exp_t) * CHAR_BIT * 4);
+      mpfr_init2 (y, 8);
+      mpfr_set_si (x, mpfr_get_emax (), GMP_RNDN);
+
+      mpfr_clear_flags ();
+      inex = mpfr_exp2 (y, x, GMP_RNDN);
+      ov = mpfr_overflow_p ();
+      if (!ov || !mpfr_inf_p (y) || inex <= 0)
+        {
+          printf ("Overflow error for x = emax, GMP_RNDN.\n");
+          mpfr_dump (y);
+          printf ("inex = %d, %soverflow\n", inex, ov ? "" : "no ");
+          exit (1);
+        }
+
+      mpfr_nextbelow (x);
+
+      mpfr_clear_flags ();
+      inex = mpfr_exp2 (y, x, GMP_RNDN);
+      ov = mpfr_overflow_p ();
+      if (!ov || !mpfr_inf_p (y) || inex <= 0)
+        {
+          printf ("Overflow error for x = emax - eps, GMP_RNDN.\n");
+          mpfr_dump (y);
+          printf ("inex = %d, %soverflow\n", inex, ov ? "" : "no ");
+          exit (1);
+        }
+
+      mpfr_clear_flags ();
+      inex = mpfr_exp2 (y, x, GMP_RNDD);
+      ov = mpfr_overflow_p ();
+      if (ov || mpfr_inf_p (y) || inex >= 0 ||
+          (mpfr_nextabove (y), !mpfr_inf_p (y)))
+        {
+          printf ("Overflow error for x = emax - eps, GMP_RNDD.\n");
+          mpfr_dump (y);
+          printf ("inex = %d, %soverflow\n", inex, ov ? "" : "no ");
+          exit (1);
+        }
+
+      mpfr_clear (x);
+      mpfr_clear (y);
+    }
+}
+
+static void
+exp_range (void)
+{
+  mpfr_t x;
+  mp_exp_t emin;
+
+  emin = mpfr_get_emin ();
+  set_emin (3);
+  mpfr_init2 (x, 8);
+  mpfr_set_ui (x, 5, GMP_RNDN);
+  mpfr_exp2 (x, x, GMP_RNDN);
+  set_emin (emin);
+  if (mpfr_nan_p (x) || mpfr_cmp_ui (x, 32) != 0)
+    {
+      printf ("Error in mpfr_exp2 for x = 5, with emin = 3\n");
+      printf ("Expected 32, got ");
+      mpfr_out_str (stdout, 2, 0, x, GMP_RNDN);
+      printf ("\n");
+      exit (1);
+    }
+  mpfr_clear (x);
+}
+
+static void
+overflowed_exp2_0 (void)
+{
+  mpfr_t x, y;
+  int emax, i, inex, rnd, err = 0;
+  mp_exp_t old_emax;
+
+  old_emax = mpfr_get_emax ();
+
+  mpfr_init2 (x, 8);
+  mpfr_init2 (y, 8);
+
+  for (emax = -1; emax <= 0; emax++)
+    {
+      mpfr_set_ui_2exp (y, 1, emax, GMP_RNDN);
+      mpfr_nextbelow (y);
+      set_emax (emax);  /* 1 is not representable. */
+      /* and if emax < 0, 1 - eps is not representable either. */
+      for (i = -1; i <= 1; i++)
+        RND_LOOP (rnd)
+          {
+            mpfr_set_si_2exp (x, i, -512 * ABS (i), GMP_RNDN);
+            mpfr_clear_flags ();
+            inex = mpfr_exp2 (x, x, (mp_rnd_t) rnd);
+            if ((i >= 0 || emax < 0 || rnd == GMP_RNDN || rnd == GMP_RNDU) &&
+                ! mpfr_overflow_p ())
+              {
+                printf ("Error in overflowed_exp2_0 (i = %d, rnd = %s):\n"
+                        "  The overflow flag is not set.\n",
+                        i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                err = 1;
+              }
+            if (rnd == GMP_RNDZ || rnd == GMP_RNDD)
+              {
+                if (inex >= 0)
+                  {
+                    printf ("Error in overflowed_exp2_0 (i = %d, rnd = %s):\n"
+                            "  The inexact value must be negative.\n",
+                            i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    err = 1;
+                  }
+                if (! mpfr_equal_p (x, y))
+                  {
+                    printf ("Error in overflowed_exp2_0 (i = %d, rnd = %s):\n"
+                            "  Got ", i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    mpfr_print_binary (x);
+                    printf (" instead of 0.11111111E%d.\n", emax);
+                    err = 1;
+                  }
+              }
+            else
+              {
+                if (inex <= 0)
+                  {
+                    printf ("Error in overflowed_exp2_0 (i = %d, rnd = %s):\n"
+                            "  The inexact value must be positive.\n",
+                            i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    err = 1;
+                  }
+                if (! (mpfr_inf_p (x) && MPFR_SIGN (x) > 0))
+                  {
+                    printf ("Error in overflowed_exp2_0 (i = %d, rnd = %s):\n"
+                            "  Got ", i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    mpfr_print_binary (x);
+                    printf (" instead of +Inf.\n");
+                    err = 1;
+                  }
+              }
+          }
+      set_emax (old_emax);
+    }
+
+  if (err)
+    exit (1);
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+int
+main (int argc, char *argv[])
+{
+  mpfr_t x, y;
+  mp_exp_t emin, emax;
+
+  tests_start_mpfr ();
+
+  special_overflow ();
+  emax_m_eps ();
+  exp_range ();
+
+  mpfr_init (x);
+  mpfr_init (y);
+
+  mpfr_set_ui (x, 4, GMP_RNDN);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui (y, 16) != 0)
+    {
+      printf ("Error for 2^4, GMP_RNDN\n");
+      exit (1);
+    }
+  mpfr_exp2 (y, x, GMP_RNDD);
+  if (mpfr_cmp_ui (y, 16) != 0)
+    {
+      printf ("Error for 2^4, GMP_RNDD\n");
+      exit (1);
+    }
+  mpfr_exp2 (y, x, GMP_RNDU);
+  if (mpfr_cmp_ui (y, 16) != 0)
+    {
+      printf ("Error for 2^4, GMP_RNDU\n");
+      exit (1);
+    }
+
+  mpfr_set_si (x, -4, GMP_RNDN);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui_2exp (y, 1, -4) != 0)
+    {
+      printf ("Error for 2^(-4), GMP_RNDN\n");
+      exit (1);
+    }
+  mpfr_exp2 (y, x, GMP_RNDD);
+  if (mpfr_cmp_ui_2exp (y, 1, -4) != 0)
+    {
+      printf ("Error for 2^(-4), GMP_RNDD\n");
+      exit (1);
+    }
+  mpfr_exp2 (y, x, GMP_RNDU);
+  if (mpfr_cmp_ui_2exp (y, 1, -4) != 0)
+    {
+      printf ("Error for 2^(-4), GMP_RNDU\n");
+      exit (1);
+    }
+
+  mpfr_set_prec (x, 53);
+  mpfr_set_prec (y, 53);
+  mpfr_set_str (x, /*-1683977482443233.0 / 2199023255552.0*/
+                "-7.6578429909351734750089235603809357e2", 10, GMP_RNDN);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if (mpfr_cmp_str1 (y, "2.991959870867646566478e-231"))
+    {
+      printf ("Error for x=-1683977482443233/2^41\n");
+      exit (1);
+    }
+
+  mpfr_set_prec (x, 10);
+  mpfr_set_prec (y, 10);
+  /* save emin */
+  emin = mpfr_get_emin ();
+  set_emin (-10);
+  mpfr_set_si (x, -12, GMP_RNDN);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui (y, 0) || mpfr_sgn (y) < 0)
+    {
+      printf ("Error for x=emin-2, RNDN\n");
+      printf ("Expected +0\n");
+      printf ("Got      "); mpfr_print_binary (y); puts ("");
+      exit (1);
+    }
+  /* restore emin */
+  set_emin (emin);
+
+  /* save emax */
+  emax = mpfr_get_emax ();
+  set_emax (10);
+  mpfr_set_ui (x, 11, GMP_RNDN);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if (!mpfr_inf_p (y) || mpfr_sgn (y) < 0)
+    {
+      printf ("Error for x=emax+1, RNDN\n");
+      exit (1);
+    }
+  /* restore emax */
+  set_emax (emax);
+
+  MPFR_SET_INF(x);
+  MPFR_SET_POS(x);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if(!MPFR_IS_INF(y))
+    {
+      printf ("evaluation of function in INF does not return INF\n");
+      exit (1);
+    }
+
+  MPFR_CHANGE_SIGN(x);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if(!MPFR_IS_ZERO(y))
+    {
+      printf ("evaluation of function in -INF does not return 0\n");
+      exit (1);
+    }
+
+  MPFR_SET_NAN(x);
+  mpfr_exp2 (y, x, GMP_RNDN);
+  if(!MPFR_IS_NAN(y))
+    {
+      printf ("evaluation of function in NaN does not return NaN\n");
+      exit (1);
+    }
+
+  if ((mp_exp_unsigned_t) 8 << 31 != 0 ||
+      mpfr_get_emax () <= (mp_exp_unsigned_t) 100000 * 100000)
+    {
+      /* emax <= 10000000000 */
+      mpfr_set_prec (x, 40);
+      mpfr_set_prec (y, 40);
+      mpfr_set_str (x, "10000000000.5", 10, GMP_RNDN);
+      mpfr_clear_flags ();
+      mpfr_exp2 (y, x, GMP_RNDN);
+      if (!(MPFR_IS_INF (y) && MPFR_IS_POS (y) && mpfr_overflow_p ()))
+        {
+          printf ("exp2(10000000000.5) should overflow.\n");
+          exit (1);
+        }
+    }
+
+  mpfr_set_prec (x, 2);
+  mpfr_set_prec (y, 2);
+  mpfr_set_str_binary (x, "-1.0E-26");
+  mpfr_exp2 (y, x, GMP_RNDD);
+  mpfr_set_str_binary (x, "1.1E-1");
+  if (mpfr_cmp (x, y))
+    {
+      printf ("Error for exp(-2^(-26)) for prec=2\n");
+      exit (1);
+    }
+
+  test_generic (2, 100, 100);
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+
+  overflowed_exp2_0 ();
+
+  data_check ("data/exp2", mpfr_exp2, "mpfr_exp2");
+
+  tests_end_mpfr ();
+  return 0;
+}