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-rw-r--r--tests/tget_set_d64.c349
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+/* Test file for mpfr_get_decimal64 and mpfr_set_decimal64.
+
+Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel 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
+http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifdef MPFR_WANT_DECIMAL_FLOATS
+
+#include <stdlib.h> /* for exit */
+#include "mpfr-test.h"
+
+#ifndef DEC64_MAX
+# define DEC64_MAX 9.999999999999999E384dd
+#endif
+
+/* #define DEBUG */
+
+static void
+print_decimal64 (_Decimal64 d)
+{
+ union ieee_double_extract x;
+ union ieee_double_decimal64 y;
+ unsigned int Gh, i;
+
+ y.d64 = d;
+ x.d = y.d;
+ Gh = x.s.exp >> 6;
+ printf ("|%d%d%d%d%d%d", x.s.sig, Gh >> 4, (Gh >> 3) & 1,
+ (Gh >> 2) & 1, (Gh >> 1) & 1, Gh & 1);
+ printf ("%d%d%d%d%d%d", (x.s.exp >> 5) & 1, (x.s.exp >> 4) & 1,
+ (x.s.exp >> 3) & 1, (x.s.exp >> 2) & 1, (x.s.exp >> 1) & 1,
+ x.s.exp & 1);
+ for (i = 20; i > 0; i--)
+ printf ("%d", (x.s.manh >> (i - 1)) & 1);
+ for (i = 32; i > 0; i--)
+ printf ("%d", (x.s.manl >> (i - 1)) & 1);
+ printf ("|\n");
+}
+
+static void
+check_inf_nan (void)
+{
+ mpfr_t x, y;
+ _Decimal64 d;
+
+ mpfr_init2 (x, 123);
+ mpfr_init2 (y, 123);
+
+ mpfr_set_nan (x);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 1, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_nan_p (x));
+
+ mpfr_set_inf (x, 1);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 1, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_inf_p (x) && mpfr_sgn (x) > 0);
+
+ mpfr_set_inf (x, -1);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 1, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_inf_p (x) && mpfr_sgn (x) < 0);
+
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 1, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp_ui (x, 0) == 0 && MPFR_SIGN (x) > 0);
+
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_neg (x, x, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 1, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp_ui (x, 0) == 0 && MPFR_SIGN (x) < 0);
+
+ mpfr_set_ui (x, 1, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp_ui (x, 1) == 0);
+
+ mpfr_set_si (x, -1, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp_si (x, -1) == 0);
+
+ mpfr_set_ui (x, 2, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp_ui (x, 2) == 0);
+
+ mpfr_set_ui (x, 99, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp_ui (x, 99) == 0);
+
+ mpfr_set_str (x, "9999999999999999", 10, MPFR_RNDZ);
+ mpfr_set (y, x, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ /* smallest normal number */
+ mpfr_set_str (x, "1E-383", 10, MPFR_RNDU);
+ mpfr_set (y, x, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDU);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ /* smallest subnormal number */
+ mpfr_set_str (x, "1E-398", 10, MPFR_RNDU);
+ mpfr_set (y, x, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDU);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ /* subnormal number with exponent change when we round back
+ from 16 digits to 1 digit */
+ mpfr_set_str (x, "9.9E-398", 10, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, MPFR_RNDU); /* should be 1E-397 */
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDD);
+ mpfr_set_str (y, "1E-397", 10, MPFR_RNDN);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ /* largest number */
+ mpfr_set_str (x, "9.999999999999999E384", 10, MPFR_RNDZ);
+ mpfr_set (y, x, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDU);
+ ASSERT_ALWAYS (d == DEC64_MAX);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ mpfr_set_str (x, "-9.999999999999999E384", 10, MPFR_RNDZ);
+ mpfr_set (y, x, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDA);
+ ASSERT_ALWAYS (d == -DEC64_MAX);
+ mpfr_set_ui (x, 0, MPFR_RNDZ);
+ mpfr_set_decimal64 (x, d, MPFR_RNDZ);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ mpfr_set_prec (x, 53);
+ mpfr_set_prec (y, 53);
+
+ /* largest number */
+ mpfr_set_str (x, "9.999999999999999E384", 10, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDZ);
+ mpfr_set_decimal64 (y, d, MPFR_RNDU);
+ ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+}
+
+static void
+check_random (void)
+{
+ mpfr_t x, y;
+ _Decimal64 d;
+ int i;
+
+ mpfr_init2 (x, 49);
+ mpfr_init2 (y, 49);
+
+ for (i = 0; i < 100000; i++)
+ {
+ mpfr_urandomb (x, RANDS); /* 0 <= x < 1 */
+ /* the normal decimal64 range contains [2^(-1272), 2^1278] */
+ mpfr_mul_2si (x, x, (i % 2550) - 1272, MPFR_RNDN);
+ if (mpfr_get_exp (x) <= -1272)
+ mpfr_mul_2exp (x, x, -1271 - mpfr_get_exp (x), MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ mpfr_set_decimal64 (y, d, MPFR_RNDN);
+ if (mpfr_cmp (x, y) != 0)
+ {
+ printf ("x="); mpfr_dump (x);
+ printf ("d="); print_decimal64 (d);
+ printf ("y="); mpfr_dump (y);
+ exit (1);
+ }
+ }
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+}
+
+/* check with native decimal formats */
+static void
+check_native (void)
+{
+ mpfr_t x;
+ _Decimal64 d;
+
+ mpfr_init2 (x, 53);
+
+ /* check important constants are correctly converted */
+ mpfr_set_ui (x, 17, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ MPFR_ASSERTN(d == 17.0dd);
+
+ mpfr_set_ui (x, 42, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ MPFR_ASSERTN(d == 42.0dd);
+
+ mpfr_set_decimal64 (x, 17.0dd, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (x, 17) == 0);
+
+ mpfr_set_decimal64 (x, 42.0dd, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (x, 42) == 0);
+
+ mpfr_clear (x);
+}
+
+static void
+check_overflow (void)
+{
+ mpfr_t x;
+ int err = 0, neg, rnd;
+
+ mpfr_init2 (x, 96);
+ for (neg = 0; neg < 2; neg++)
+ RND_LOOP (rnd)
+ {
+ _Decimal64 d, e;
+ mpfr_rnd_t r = (mpfr_rnd_t) rnd;
+ int sign = neg ? -1 : 1;
+
+ e = sign * (MPFR_IS_LIKE_RNDZ (r, neg) ? 1 : 2) * DEC64_MAX;
+ /* This tests the binary exponent e > 1279 case of get_d64.c */
+ mpfr_set_si_2exp (x, sign, 9999, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, r);
+ if (d != e)
+ {
+ printf ("Error 1 in check_overflow for %s, %s\n",
+ neg ? "negative" : "positive",
+ mpfr_print_rnd_mode (r));
+ err = 1;
+ }
+ /* This tests the decimal exponent e > 385 case of get_d64.c */
+ mpfr_set_si_2exp (x, sign * 31, 1274, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, r);
+ if (d != e)
+ {
+ printf ("Error 2 in check_overflow for %s, %s\n",
+ neg ? "negative" : "positive",
+ mpfr_print_rnd_mode (r));
+ err = 1;
+ }
+ /* This tests the last else (-382 <= e <= 385) of get_d64.c */
+ mpfr_set_decimal64 (x, e, MPFR_RNDA);
+ d = mpfr_get_decimal64 (x, r);
+ if (d != e)
+ {
+ printf ("Error 3 in check_overflow for %s, %s\n",
+ neg ? "negative" : "positive",
+ mpfr_print_rnd_mode (r));
+ err = 1;
+ }
+ }
+ mpfr_clear (x);
+ if (err)
+ exit (1);
+}
+
+static void
+check_tiny (void)
+{
+ mpfr_t x;
+ _Decimal64 d;
+
+ /* If 0.5E-398 < |x| < 1E-398 (smallest subnormal), x should round
+ to +/- 1E-398 in MPFR_RNDN. Note: the midpoint 0.5E-398 between
+ 0 and 1E-398 is not a representable binary number, so that there
+ are no tests for it. */
+ mpfr_init2 (x, 128);
+ mpfr_set_str (x, "1E-398", 10, MPFR_RNDZ);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ MPFR_ASSERTN (d == 1.0E-398dd);
+ mpfr_neg (x, x, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ MPFR_ASSERTN (d == -1.0E-398dd);
+ mpfr_set_str (x, "0.5E-398", 10, MPFR_RNDU);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ MPFR_ASSERTN (d == 1.0E-398dd);
+ mpfr_neg (x, x, MPFR_RNDN);
+ d = mpfr_get_decimal64 (x, MPFR_RNDN);
+ MPFR_ASSERTN (d == -1.0E-398dd);
+ mpfr_clear (x);
+}
+
+int
+main (void)
+{
+ tests_start_mpfr ();
+ mpfr_test_init ();
+
+#ifdef DEBUG
+#ifdef DPD_FORMAT
+ printf ("Using DPD format\n");
+#else
+ printf ("Using BID format\n");
+#endif
+#endif
+ check_inf_nan ();
+ check_random ();
+ check_native ();
+ check_overflow ();
+ check_tiny ();
+
+ tests_end_mpfr ();
+ return 0;
+}
+
+#else /* MPFR_WANT_DECIMAL_FLOATS */
+
+int
+main (void)
+{
+ return 77;
+}
+
+#endif /* MPFR_WANT_DECIMAL_FLOATS */
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