--- /dev/null
+/* Test file for mpfr_set_d and mpfr_get_d.
+
+Copyright 1999, 2000, 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 <float.h>
+
+#include "mpfr-test.h"
+
+int
+main (int argc, char *argv[])
+{
+ mpfr_t x, y, z;
+ unsigned long k, n;
+ volatile double d;
+ double dd;
+
+ tests_start_mpfr ();
+ mpfr_test_init ();
+
+#ifndef MPFR_DOUBLE_SPEC
+ printf ("Warning! The MPFR_DOUBLE_SPEC macro is not defined. This means\n"
+ "that you do not have a conforming C implementation and problems\n"
+ "may occur with conversions between MPFR numbers and standard\n"
+ "floating-point types. Please contact the MPFR team.\n");
+#elif MPFR_DOUBLE_SPEC == 0
+ /*
+ printf ("The type 'double' of your C implementation does not seem to\n"
+ "correspond to the IEEE-754 double precision. Though code has\n"
+ "been written to support such implementations, tests have been\n"
+ "done only on IEEE-754 double-precision implementations and\n"
+ "conversions between MPFR numbers and standard floating-point\n"
+ "types may be inaccurate. You may wish to contact the MPFR team\n"
+ "for further testing.\n");
+ */
+ printf ("The type 'double' of your C implementation does not seem to\n"
+ "correspond to the IEEE-754 double precision. Such particular\n"
+ "implementations are not supported yet, and conversions between\n"
+ "MPFR numbers and standard floating-point types may be very\n"
+ "inaccurate.\n");
+ printf ("FLT_RADIX = %ld\n", (long) FLT_RADIX);
+ printf ("DBL_MANT_DIG = %ld\n", (long) DBL_MANT_DIG);
+ printf ("DBL_MIN_EXP = %ld\n", (long) DBL_MIN_EXP);
+ printf ("DBL_MAX_EXP = %ld\n", (long) DBL_MAX_EXP);
+#endif
+
+ mpfr_init (x);
+
+ mpfr_set_nan (x);
+ d = mpfr_get_d (x, GMP_RNDN);
+ if (! DOUBLE_ISNAN (d))
+ {
+ printf ("ERROR for NAN (1)\n");
+#ifdef MPFR_NANISNAN
+ printf ("The reason is that NAN == NAN. Please look at the configure "
+ "output\nand Section \"In case of problem\" of the INSTALL "
+ "file.\n");
+#endif
+ exit (1);
+ }
+ mpfr_set_ui (x, 0, GMP_RNDN);
+ mpfr_set_d (x, d, GMP_RNDN);
+ if (! mpfr_nan_p (x))
+ {
+ printf ("ERROR for NAN (2)\n");
+#ifdef MPFR_NANISNAN
+ printf ("The reason is that NAN == NAN. Please look at the configure "
+ "output\nand Section \"In case of problem\" of the INSTALL "
+ "file.\n");
+#endif
+ exit (1);
+ }
+
+ d = 0.0;
+ mpfr_set_d (x, d, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x));
+ d = -d;
+ mpfr_set_d (x, d, GMP_RNDN);
+ if (mpfr_cmp_ui (x, 0) != 0 || MPFR_IS_POS(x))
+ {
+ printf ("Error in mpfr_set_d on -0\n");
+ exit (1);
+ }
+
+ mpfr_set_inf (x, 1);
+ d = mpfr_get_d (x, GMP_RNDN);
+ mpfr_set_ui (x, 0, GMP_RNDN);
+ mpfr_set_d (x, d, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
+
+ mpfr_set_inf (x, -1);
+ d = mpfr_get_d (x, GMP_RNDN);
+ mpfr_set_ui (x, 0, GMP_RNDN);
+ mpfr_set_d (x, d, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) < 0);
+
+ mpfr_set_prec (x, 2);
+
+ /* checks that denormalized are not flushed to zero */
+ d = DBL_MIN; /* 2^(-1022) */
+ for (n=0; n<52; n++, d /= 2.0)
+ if (d != 0.0) /* should be 2^(-1022-n) */
+ {
+ mpfr_set_d (x, d, GMP_RNDN);
+ if (mpfr_cmp_ui_2exp (x, 1, -1022-n))
+ {
+ printf ("Wrong result for d=2^(%ld), ", -1022-n);
+ printf ("got ");
+ mpfr_out_str (stdout, 10, 10, x, GMP_RNDN);
+ printf ("\n");
+ mpfr_print_binary (x);
+ puts ("");
+ exit (1);
+ }
+ }
+
+ /* checks that rounds to nearest sets the last
+ bit to zero in case of equal distance */
+ mpfr_set_d (x, 5.0, GMP_RNDN);
+ if (mpfr_cmp_ui (x, 4))
+ {
+ printf ("Error in tset_d: expected 4.0, got ");
+ mpfr_print_binary (x); putchar('\n');
+ exit (1);
+ }
+ mpfr_set_d (x, -5.0, GMP_RNDN);
+ if (mpfr_cmp_si (x, -4))
+ {
+ printf ("Error in tset_d: expected -4.0, got ");
+ mpfr_print_binary (x); putchar('\n');
+ exit (1);
+ }
+
+ mpfr_set_d (x, 9.84891017624509146344e-01, GMP_RNDU);
+ if (mpfr_cmp_ui (x, 1))
+ {
+ printf ("Error in tset_d: expected 1.0, got ");
+ mpfr_print_binary (x); putchar('\n');
+ exit (1);
+ }
+
+ mpfr_init2 (z, 32);
+ mpfr_set_d (z, 1.0, (mp_rnd_t) 0);
+ if (mpfr_cmp_ui (z, 1))
+ {
+ mpfr_print_binary (z); puts ("");
+ printf ("Error: 1.0 != 1.0\n");
+ exit (1);
+ }
+ mpfr_set_prec (x, 53);
+ mpfr_init2 (y, 53);
+ mpfr_set_d (x, d=-1.08007920352320089721e+150, (mp_rnd_t) 0);
+ if (mpfr_get_d1 (x) != d)
+ {
+ mpfr_print_binary (x); puts ("");
+ printf ("Error: get_d o set_d <> identity for d = %1.20e %1.20e\n",
+ d, mpfr_get_d1 (x));
+ exit (1);
+ }
+
+ mpfr_set_d (x, 8.06294740693074521573e-310, (mp_rnd_t) 0);
+ d = -6.72658901114033715233e-165;
+ mpfr_set_d (x, d, (mp_rnd_t) 0);
+ if (d != mpfr_get_d1 (x))
+ {
+ mpfr_print_binary (x);
+ puts ("");
+ printf ("Error: get_d o set_d <> identity for d = %1.20e %1.20e\n",
+ d, mpfr_get_d1 (x));
+ exit (1);
+ }
+
+ n = (argc==1) ? 500000 : atoi(argv[1]);
+ for (k = 1; k <= n; k++)
+ {
+ do
+ {
+ d = DBL_RAND ();
+ }
+#ifdef HAVE_DENORMS
+ while (0);
+#else
+ while (ABS(d) < DBL_MIN);
+#endif
+ mpfr_set_d (x, d, (mp_rnd_t) 0);
+ dd = mpfr_get_d1 (x);
+ if (d != dd && !(Isnan(d) && Isnan(dd)))
+ {
+ printf ("Mismatch on : %1.18g != %1.18g\n", d, mpfr_get_d1 (x));
+ mpfr_print_binary (x);
+ puts ("");
+ exit (1);
+ }
+ }
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+ mpfr_clear (z);
+
+ tests_end_mpfr ();
+ return 0;
+}
projects / msp430-gcc.git / blobdiff