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Diffstat (limited to 'mpfr/tests/tcbrt.c')
| -rw-r--r-- | mpfr/tests/tcbrt.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/mpfr/tests/tcbrt.c b/mpfr/tests/tcbrt.c new file mode 100644 index 0000000000..58e65ffd5c --- /dev/null +++ b/mpfr/tests/tcbrt.c @@ -0,0 +1,219 @@ +/* Test file for mpfr_cbrt. + +Copyright 2002-2016 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 +http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., +51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include <stdio.h> +#include <stdlib.h> + +#include "mpfr-test.h" + +static void +special (void) +{ + mpfr_t x, y; + + mpfr_init (x); + mpfr_init (y); + + /* cbrt(NaN) = NaN */ + mpfr_set_nan (x); + mpfr_cbrt (y, x, MPFR_RNDN); + if (!mpfr_nan_p (y)) + { + printf ("Error: cbrt(NaN) <> NaN\n"); + exit (1); + } + + /* cbrt(+Inf) = +Inf */ + mpfr_set_inf (x, 1); + mpfr_cbrt (y, x, MPFR_RNDN); + if (!mpfr_inf_p (y) || mpfr_sgn (y) < 0) + { + printf ("Error: cbrt(+Inf) <> +Inf\n"); + exit (1); + } + + /* cbrt(-Inf) = -Inf */ + mpfr_set_inf (x, -1); + mpfr_cbrt (y, x, MPFR_RNDN); + if (!mpfr_inf_p (y) || mpfr_sgn (y) > 0) + { + printf ("Error: cbrt(-Inf) <> -Inf\n"); + exit (1); + } + + /* cbrt(+/-0) = +/-0 */ + mpfr_set_ui (x, 0, MPFR_RNDN); + mpfr_cbrt (y, x, MPFR_RNDN); + if (mpfr_cmp_ui (y, 0) || mpfr_sgn (y) < 0) + { + printf ("Error: cbrt(+0) <> +0\n"); + exit (1); + } + mpfr_neg (x, x, MPFR_RNDN); + mpfr_cbrt (y, x, MPFR_RNDN); + if (mpfr_cmp_ui (y, 0) || mpfr_sgn (y) > 0) + { + printf ("Error: cbrt(-0) <> -0\n"); + exit (1); + } + + mpfr_set_prec (x, 53); + mpfr_set_str (x, "8.39005285514734966412e-01", 10, MPFR_RNDN); + mpfr_cbrt (x, x, MPFR_RNDN); + if (mpfr_cmp_str1 (x, "9.43166207799662426048e-01")) + { + printf ("Error in crbrt (1)\n"); + exit (1); + } + + mpfr_set_prec (x, 32); + mpfr_set_prec (y, 32); + mpfr_set_str_binary (x, "0.10000100001100101001001001011001"); + mpfr_cbrt (x, x, MPFR_RNDN); + mpfr_set_str_binary (y, "0.11001101011000100111000111111001"); + if (mpfr_cmp (x, y)) + { + printf ("Error in cbrt (2)\n"); + exit (1); + } + + mpfr_set_prec (x, 32); + mpfr_set_prec (y, 32); + mpfr_set_str_binary (x, "-0.1100001110110000010101011001011"); + mpfr_cbrt (x, x, MPFR_RNDD); + mpfr_set_str_binary (y, "-0.11101010000100100101000101011001"); + if (mpfr_cmp (x, y)) + { + printf ("Error in cbrt (3)\n"); + exit (1); + } + + mpfr_set_prec (x, 82); + mpfr_set_prec (y, 27); + mpfr_set_str_binary (x, "0.1010001111011101011011000111001011001101100011110110010011011011011010011001100101e-7"); + mpfr_cbrt (y, x, MPFR_RNDD); + mpfr_set_str_binary (x, "0.101011110001110001000100011E-2"); + if (mpfr_cmp (x, y)) + { + printf ("Error in cbrt (4)\n"); + exit (1); + } + + mpfr_set_prec (x, 204); + mpfr_set_prec (y, 38); + mpfr_set_str_binary (x, "0.101000000001101000000001100111111011111001110110100001111000100110100111001101100111110001110001011011010110010011100101111001111100001010010100111011101100000011011000101100010000000011000101001010001001E-5"); + mpfr_cbrt (y, x, MPFR_RNDD); + mpfr_set_str_binary (x, "0.10001001111010011011101000010110110010E-1"); + if (mpfr_cmp (x, y)) + { + printf ("Error in cbrt (5)\n"); + exit (1); + } + + /* Bug (in the compiler?) found on Linux/m68k with gcc 4.0.2 */ + mpfr_set_prec (x, 5); + mpfr_set_prec (y, 5); + mpfr_set_str_binary (x, "1.1000E-2"); + mpfr_cbrt (y, x, MPFR_RNDN); + mpfr_set_str_binary (x, "1.0111E-1"); + if (mpfr_cmp (x, y)) + { + printf ("Error in cbrt (6)\n"); + exit (1); + } + + mpfr_clear (x); + mpfr_clear (y); +} + +#define TEST_FUNCTION mpfr_cbrt +#include "tgeneric.c" + +int +main (void) +{ + mpfr_t x; + int r; + mpfr_prec_t p; + + tests_start_mpfr (); + + special (); + + mpfr_init (x); + + for (p=2; p<100; p++) + { + mpfr_set_prec (x, p); + for (r = 0; r < MPFR_RND_MAX; r++) + { + mpfr_set_ui (x, 1, MPFR_RNDN); + mpfr_cbrt (x, x, (mpfr_rnd_t) r); + if (mpfr_cmp_ui (x, 1)) + { + printf ("Error in mpfr_cbrt for x=1, rnd=%s\ngot ", + mpfr_print_rnd_mode ((mpfr_rnd_t) r)); + mpfr_out_str (stdout, 2, 0, x, MPFR_RNDN); + printf ("\n"); + exit (1); + } + mpfr_set_si (x, -1, MPFR_RNDN); + mpfr_cbrt (x, x, (mpfr_rnd_t) r); + if (mpfr_cmp_si (x, -1)) + { + printf ("Error in mpfr_cbrt for x=-1, rnd=%s\ngot ", + mpfr_print_rnd_mode ((mpfr_rnd_t) r)); + mpfr_out_str (stdout, 2, 0, x, MPFR_RNDN); + printf ("\n"); + exit (1); + } + + if (p >= 5) + { + int i; + for (i = -12; i <= 12; i++) + { + mpfr_set_ui (x, 27, MPFR_RNDN); + mpfr_mul_2si (x, x, 3*i, MPFR_RNDN); + mpfr_cbrt (x, x, MPFR_RNDN); + if (mpfr_cmp_si_2exp (x, 3, i)) + { + printf ("Error in mpfr_cbrt for " + "x = 27.0 * 2^(%d), rnd=%s\ngot ", + 3*i, mpfr_print_rnd_mode ((mpfr_rnd_t) r)); + mpfr_out_str (stdout, 2, 0, x, MPFR_RNDN); + printf ("\ninstead of 3 * 2^(%d)\n", i); + exit (1); + } + } + } + } + } + mpfr_clear (x); + + test_generic (2, 200, 10); + + data_check ("data/cbrt", mpfr_cbrt, "mpfr_cbrt"); + + tests_end_mpfr (); + return 0; +} |