| /* Test file for mpfr_agm. |
| |
| Copyright 1999, 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 "mpfr-test.h" |
| |
| #define check(a,b,r) check4(a,b,r,0.0) |
| |
| static void |
| check4 (const char *as, const char *bs, mp_rnd_t rnd_mode, const char *res) |
| { |
| mpfr_t ta, tb, tres; |
| |
| mpfr_inits2 (53, ta, tb, tres, (mpfr_ptr) 0); |
| |
| mpfr_set_str1 (ta, as); |
| mpfr_set_str1 (tb, bs); |
| |
| mpfr_agm(tres, ta, tb, rnd_mode); |
| |
| if (mpfr_cmp_str1 (tres, res)) |
| { |
| printf ("mpfr_agm failed for a=%s, b=%s, rnd_mode=%d\n",as,bs,rnd_mode); |
| printf ("expected result is %s, got ",res); |
| mpfr_out_str(stdout, 10, 0, tres, GMP_RNDN); |
| putchar('\n'); |
| exit (1); |
| } |
| mpfr_clears (ta, tb, tres, (mpfr_ptr) 0); |
| } |
| |
| static void |
| check_large (void) |
| { |
| mpfr_t a, b, agm; |
| int inex; |
| |
| mpfr_init2 (a, 82); |
| mpfr_init2 (b, 82); |
| mpfr_init2 (agm, 82); |
| |
| mpfr_set_ui (a, 1, GMP_RNDN); |
| mpfr_set_str_binary (b, "0.1111101100001000000001011000110111101000001011111000100001000101010100011111110010E-39"); |
| mpfr_agm (agm, a, b, GMP_RNDN); |
| mpfr_set_str_binary (a, "0.1110001000111101101010101010101101001010001001001011100101111011110101111001111100E-4"); |
| if (mpfr_cmp (agm, a)) |
| { |
| printf ("mpfr_agm failed for precision 82\n"); |
| exit (1); |
| } |
| |
| /* problem found by Damien Fischer <damien@maths.usyd.edu.au> 4 Aug 2003: |
| produced a division by zero exception */ |
| mpfr_set_prec (a, 268); |
| mpfr_set_prec (b, 268); |
| mpfr_set_prec (agm, 268); |
| mpfr_set_str (a, "703.93543315330225238487276503953366664991725089988315253092140138947103394917006", 10, GMP_RNDN); |
| mpfr_set_str (b, "703.93543315330225238487279020523738740563816490895994499256063816906728642622316", 10, GMP_RNDN); |
| mpfr_agm (agm, a, b, GMP_RNDN); |
| |
| mpfr_set_prec (a, 18); |
| mpfr_set_prec (b, 70); |
| mpfr_set_prec (agm, 67); |
| mpfr_set_str_binary (a, "0.111001111100101000e8"); |
| mpfr_set_str_binary (b, "0.1101110111100100010100110000010111011011011100110100111001010100100001e10"); |
| inex = mpfr_agm (agm, a, b, GMP_RNDN); |
| mpfr_set_str_binary (b, "0.1111110010011101101100010101011011010010010000001010100011000110011e9"); |
| if (mpfr_cmp (agm, b)) |
| { |
| printf ("Error in mpfr_agm (1)\n"); |
| exit (1); |
| } |
| if (inex >= 0) |
| { |
| printf ("Wrong flag for mpfr_agm (1)\n"); |
| exit (1); |
| } |
| |
| /* test worst case: 9 consecutive ones after the last bit */ |
| mpfr_set_prec (a, 2); |
| mpfr_set_prec (b, 2); |
| mpfr_set_ui (a, 1, GMP_RNDN); |
| mpfr_set_ui (b, 2, GMP_RNDN); |
| mpfr_set_prec (agm, 904); |
| mpfr_agm (agm, a, b, GMP_RNDZ); |
| |
| mpfr_clear (a); |
| mpfr_clear (b); |
| mpfr_clear (agm); |
| } |
| |
| static void |
| check_nans (void) |
| { |
| mpfr_t x, y, m; |
| |
| mpfr_init2 (x, 123L); |
| mpfr_init2 (y, 123L); |
| mpfr_init2 (m, 123L); |
| |
| /* agm(1,nan) == nan */ |
| mpfr_set_ui (x, 1L, GMP_RNDN); |
| mpfr_set_nan (y); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (m)); |
| |
| /* agm(1,+inf) == +inf */ |
| mpfr_set_ui (x, 1L, GMP_RNDN); |
| mpfr_set_inf (y, 1); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (m)); |
| MPFR_ASSERTN (mpfr_sgn (m) > 0); |
| |
| /* agm(+inf,+inf) == +inf */ |
| mpfr_set_inf (x, 1); |
| mpfr_set_inf (y, 1); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (m)); |
| MPFR_ASSERTN (mpfr_sgn (m) > 0); |
| |
| /* agm(-inf,+inf) == nan */ |
| mpfr_set_inf (x, -1); |
| mpfr_set_inf (y, 1); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (m)); |
| |
| /* agm(+0,+inf) == nan */ |
| mpfr_set_ui (x, 0, GMP_RNDN); |
| mpfr_set_inf (y, 1); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (m)); |
| |
| /* agm(+0,1) == +0 */ |
| mpfr_set_ui (x, 0, GMP_RNDN); |
| mpfr_set_ui (y, 1, GMP_RNDN); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (MPFR_IS_ZERO (m) && MPFR_IS_POS(m)); |
| |
| /* agm(-0,1) == +0 */ |
| mpfr_set_ui (x, 0, GMP_RNDN); |
| mpfr_neg (x, x, GMP_RNDN); |
| mpfr_set_ui (y, 1, GMP_RNDN); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (MPFR_IS_ZERO (m) && MPFR_IS_POS(m)); |
| |
| /* agm(-0,+0) == +0 */ |
| mpfr_set_ui (x, 0, GMP_RNDN); |
| mpfr_neg (x, x, GMP_RNDN); |
| mpfr_set_ui (y, 0, GMP_RNDN); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (MPFR_IS_ZERO (m) && MPFR_IS_POS(m)); |
| |
| /* agm(1,1) == 1 */ |
| mpfr_set_ui (x, 1, GMP_RNDN); |
| mpfr_set_ui (y, 1, GMP_RNDN); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_cmp_ui (m ,1) == 0); |
| |
| /* agm(-1,-2) == NaN */ |
| mpfr_set_si (x, -1, GMP_RNDN); |
| mpfr_set_si (y, -2, GMP_RNDN); |
| mpfr_agm (m, x, y, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (m)); |
| |
| mpfr_clear (x); |
| mpfr_clear (y); |
| mpfr_clear (m); |
| } |
| |
| #define TEST_FUNCTION mpfr_agm |
| #define TWO_ARGS |
| #define TEST_RANDOM_POS 4 |
| #define TEST_RANDOM_POS2 4 |
| #include "tgeneric.c" |
| |
| int |
| main (int argc, char* argv[]) |
| { |
| tests_start_mpfr (); |
| |
| check_nans (); |
| |
| check_large (); |
| check4 ("2.0", "1.0", GMP_RNDN, "1.45679103104690677029"); |
| check4 ("6.0", "4.0", GMP_RNDN, "4.94936087247260925182"); |
| check4 ("62.0", "61.0", GMP_RNDN, "6.14989837188450749750e+01"); |
| check4 ("0.5", "1.0", GMP_RNDN, "7.28395515523453385143e-01"); |
| check4 ("1.0", "2.0", GMP_RNDN, "1.45679103104690677029"); |
| check4 ("234375765.0", "234375000.0", GMP_RNDN, "2.3437538249984395504e8"); |
| check4 ("8.0", "1.0", GMP_RNDU, "3.615756177597362786"); |
| check4 ("1.0", "44.0", GMP_RNDU, "1.33658354512981247808e1"); |
| check4 ("1.0", "3.7252902984619140625e-9", GMP_RNDU, |
| "7.55393356971199025907e-02"); |
| test_generic (2, 300, 17); |
| |
| tests_end_mpfr (); |
| return 0; |
| } |