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88896a1144
Change-Id: I42dc2a783b3e0082a7583cc7ecaa6b043ba162f4 Reviewed-on: https://review.haiku-os.org/c/buildtools/+/3021 Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/* Test file for mpfr_mul_d
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Copyright 2007-2020 Free Software Foundation, Inc.
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Contributed by the AriC and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
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https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
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#include <float.h>
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#include "mpfr-test.h"
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static void
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check_nans (void)
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{
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mpfr_t x, y;
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int inexact;
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mpfr_init2 (x, 123);
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mpfr_init2 (y, 123);
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/* nan * 1.0 is nan */
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mpfr_set_nan (x);
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mpfr_clear_flags();
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inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN);
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MPFR_ASSERTN (inexact == 0);
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MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
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MPFR_ASSERTN (mpfr_nan_p (y));
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/* +inf * 1.0 == +inf */
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mpfr_set_inf (x, 1);
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mpfr_clear_flags();
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inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN);
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MPFR_ASSERTN (inexact == 0);
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MPFR_ASSERTN (__gmpfr_flags == 0);
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MPFR_ASSERTN (mpfr_inf_p (y));
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MPFR_ASSERTN (MPFR_IS_POS (y));
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/* +inf * 0.0 is nan */
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mpfr_clear_flags();
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inexact = mpfr_mul_d (y, x, 0.0, MPFR_RNDN);
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MPFR_ASSERTN (inexact == 0);
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MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
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MPFR_ASSERTN (mpfr_nan_p (y));
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/* -inf * 1.0 == -inf */
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mpfr_set_inf (x, -1);
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mpfr_clear_flags();
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inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN);
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MPFR_ASSERTN (inexact == 0);
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MPFR_ASSERTN (__gmpfr_flags == 0);
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MPFR_ASSERTN (mpfr_inf_p (y));
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MPFR_ASSERTN (MPFR_IS_NEG (y));
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mpfr_clear (x);
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mpfr_clear (y);
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}
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static void
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bug20171218 (void)
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{
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mpfr_t a, b;
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mpfr_init2 (a, 22);
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mpfr_init2 (b, 1312);
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mpfr_set_str (b, "1.ffffffffffffffffffc3e0007ffe000700fff8001fff800000000007e0fffe0007fffffff00001f800000003ffffffe1fc00000003fffe7c03ffffffffffffffe000000fffffffff83f0000007ffc03ffffffffc0007ff0000ffcfffffe00000f80000000003c007ffffffff3ff807ffffffffff000000000000001fc000fffe000600000ff0003ffe00fffffffc00001ffc0fffffffffff00000807fe03ffffffc01ffe", 16, MPFR_RNDN);
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mpfr_mul_d (a, b, 0.5, MPFR_RNDF);
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/* a should be 1 or nextbelow(1) */
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if (mpfr_cmp_ui (a, 1) != 0)
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{
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mpfr_nextabove (a);
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MPFR_ASSERTN(mpfr_cmp_ui (a, 1) == 0);
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}
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mpfr_clear (a);
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mpfr_clear (b);
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}
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#define TEST_FUNCTION mpfr_mul_d
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#define DOUBLE_ARG2
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#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
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#include "tgeneric.c"
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int
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main (void)
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{
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mpfr_t x, y, z;
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double d;
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int inexact;
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tests_start_mpfr ();
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bug20171218 ();
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/* check with enough precision */
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mpfr_init2 (x, IEEE_DBL_MANT_DIG);
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mpfr_init2 (y, IEEE_DBL_MANT_DIG);
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mpfr_init2 (z, IEEE_DBL_MANT_DIG);
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mpfr_set_str (y, "4096", 10, MPFR_RNDN);
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d = 0.125;
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mpfr_clear_flags ();
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inexact = mpfr_mul_d (x, y, d, MPFR_RNDN);
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if (inexact != 0)
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{
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printf ("Inexact flag error in mpfr_mul_d\n");
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exit (1);
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}
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mpfr_set_str (z, "512", 10, MPFR_RNDN);
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if (mpfr_cmp (z, x))
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{
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printf ("Error in mpfr_mul_d (");
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mpfr_out_str (stdout, 10, 0, y, MPFR_RNDN);
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printf (" + %.20g)\nexpected ", d);
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mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN);
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printf ("\ngot ");
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mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
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printf ("\n");
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exit (1);
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}
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mpfr_clears (x, y, z, (mpfr_ptr) 0);
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check_nans ();
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test_generic (MPFR_PREC_MIN, 1000, 100);
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tests_end_mpfr ();
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return 0;
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}
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