| /* Test file for mpfr_abs. |
| |
| Copyright 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" |
| |
| static void |
| check_inexact (void) |
| { |
| mp_prec_t p, q; |
| mpfr_t x, y, absx; |
| int rnd; |
| int inexact, cmp; |
| |
| mpfr_init (x); |
| mpfr_init (y); |
| mpfr_init (absx); |
| |
| for (p=2; p<500; p++) |
| { |
| mpfr_set_prec (x, p); |
| mpfr_set_prec (absx, p); |
| mpfr_urandomb (x, RANDS); |
| if (randlimb () % 2) |
| { |
| mpfr_set (absx, x, GMP_RNDN); |
| mpfr_neg (x, x, GMP_RNDN); |
| } |
| else |
| mpfr_set (absx, x, GMP_RNDN); |
| for (q=2; q<2*p; q++) |
| { |
| mpfr_set_prec (y, q); |
| RND_LOOP (rnd) |
| { |
| inexact = mpfr_abs (y, x, (mp_rnd_t) rnd); |
| cmp = mpfr_cmp (y, absx); |
| if (((inexact == 0) && (cmp != 0)) || |
| ((inexact > 0) && (cmp <= 0)) || |
| ((inexact < 0) && (cmp >= 0))) |
| { |
| printf ("Wrong inexact flag: expected %d, got %d\n", |
| cmp, inexact); |
| printf ("x="); mpfr_print_binary (x); puts (""); |
| printf ("absx="); mpfr_print_binary (absx); puts (""); |
| printf ("y="); mpfr_print_binary (y); puts (""); |
| exit (1); |
| } |
| } |
| } |
| } |
| |
| mpfr_clear (x); |
| mpfr_clear (y); |
| mpfr_clear (absx); |
| } |
| |
| static void |
| check_cmp (int argc, char *argv[]) |
| { |
| mpfr_t x, y; |
| int n, k; |
| |
| mpfr_inits2 (53, x, y, (mpfr_ptr) 0); |
| |
| mpfr_set_ui(x, 1, GMP_RNDN); |
| (mpfr_abs) (x, x, GMP_RNDN); |
| if (mpfr_cmp_ui (x, 1)) |
| { |
| printf ("Error in mpfr_abs(1.0)\n"); |
| exit (1); |
| } |
| |
| mpfr_set_si(x, -1, GMP_RNDN); |
| mpfr_abs(x, x, GMP_RNDN); |
| if (mpfr_cmp_ui (x, 1)) |
| { |
| printf ("Error in mpfr_abs(1.0)\n"); |
| exit (1); |
| } |
| |
| mpfr_set_si(x, -1, GMP_RNDN); |
| mpfr_abs(x, x, GMP_RNDN); |
| if (mpfr_cmp_ui (x, 1)) |
| { |
| printf ("Error in mpfr_abs(-1.0)\n"); |
| exit (1); |
| } |
| |
| mpfr_set_inf (x, 1); |
| mpfr_abs (x, x, GMP_RNDN); |
| if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0)) |
| { |
| printf ("Error in mpfr_abs(Inf).\n"); |
| exit (1); |
| } |
| mpfr_set_inf (x, -1); |
| mpfr_abs (x, x, GMP_RNDN); |
| if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0)) |
| { |
| printf ("Error in mpfr_abs(-Inf).\n"); |
| exit (1); |
| } |
| |
| MPFR_SET_NAN(x); |
| mpfr_abs (x, x, GMP_RNDN); |
| if (!MPFR_IS_NAN(x)) |
| { |
| printf ("Error in mpfr_abs(NAN).\n"); |
| exit (1); |
| } |
| |
| n = (argc==1) ? 25000 : atoi(argv[1]); |
| for (k = 1; k <= n; k++) |
| { |
| mp_rnd_t rnd; |
| int sign = SIGN_RAND (); |
| |
| mpfr_urandomb (x, RANDS); |
| MPFR_SET_SIGN (x, sign); |
| rnd = RND_RAND (); |
| mpfr_abs (y, x, rnd); |
| MPFR_SET_POS (x); |
| if (mpfr_cmp (x, y)) |
| { |
| printf ("Mismatch for sign=%d and x=", sign); |
| mpfr_print_binary (x); |
| printf ("\nResults="); |
| mpfr_print_binary (y); |
| putchar ('\n'); |
| exit (1); |
| } |
| } |
| |
| mpfr_clears (x, y, (mpfr_ptr) 0); |
| } |
| |
| #define TEST_FUNCTION mpfr_abs |
| #include "tgeneric.c" |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| mpfr_test_init (); |
| tests_start_mpfr (); |
| |
| check_inexact (); |
| check_cmp (argc, argv); |
| |
| test_generic (2, 1000, 10); |
| |
| tests_end_mpfr (); |
| return 0; |
| } |