| /* Test file for mpfr_copysign, mpfr_setsign and mpfr_signbit. |
| |
| Copyright 2004, 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" |
| |
| static void |
| copysign_variant (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, |
| mp_rnd_t rnd_mode, int k) |
| { |
| mpfr_clear_flags (); |
| switch (k) |
| { |
| case 0: |
| mpfr_copysign (z, x, y, GMP_RNDN); |
| return; |
| case 1: |
| (mpfr_copysign) (z, x, y, GMP_RNDN); |
| return; |
| case 2: |
| mpfr_setsign (z, x, mpfr_signbit (y), GMP_RNDN); |
| return; |
| case 3: |
| mpfr_setsign (z, x, (mpfr_signbit) (y), GMP_RNDN); |
| return; |
| case 4: |
| (mpfr_setsign) (z, x, mpfr_signbit (y), GMP_RNDN); |
| return; |
| case 5: |
| (mpfr_setsign) (z, x, (mpfr_signbit) (y), GMP_RNDN); |
| return; |
| } |
| } |
| |
| int |
| main (void) |
| { |
| mpfr_t x, y, z; |
| int i, j, k; |
| |
| tests_start_mpfr (); |
| |
| mpfr_init (x); |
| mpfr_init (y); |
| mpfr_init (z); |
| |
| for (i = 0; i <= 1; i++) |
| for (j = 0; j <= 1; j++) |
| for (k = 0; k <= 5; k++) |
| { |
| mpfr_set_nan (x); |
| i ? MPFR_SET_NEG (x) : MPFR_SET_POS (x); |
| mpfr_set_nan (y); |
| j ? MPFR_SET_NEG (y) : MPFR_SET_POS (y); |
| copysign_variant (z, x, y, GMP_RNDN, k); |
| if (MPFR_SIGN (z) != MPFR_SIGN (y) || !mpfr_nanflag_p ()) |
| { |
| printf ("Error in mpfr_copysign (%cNaN, %cNaN)\n", |
| i ? '-' : '+', j ? '-' : '+'); |
| exit (1); |
| } |
| |
| mpfr_set_si (x, i ? -1250 : 1250, GMP_RNDN); |
| mpfr_set_nan (y); |
| j ? MPFR_SET_NEG (y) : MPFR_SET_POS (y); |
| copysign_variant (z, x, y, GMP_RNDN, k); |
| if (i != j) |
| mpfr_neg (x, x, GMP_RNDN); |
| if (! mpfr_equal_p (z, x) || mpfr_nanflag_p ()) |
| { |
| printf ("Error in mpfr_copysign (%c1250, %cNaN)\n", |
| i ? '-' : '+', j ? '-' : '+'); |
| exit (1); |
| } |
| |
| mpfr_set_si (x, i ? -1250 : 1250, GMP_RNDN); |
| mpfr_set_si (y, j ? -1717 : 1717, GMP_RNDN); |
| copysign_variant (z, x, y, GMP_RNDN, k); |
| if (i != j) |
| mpfr_neg (x, x, GMP_RNDN); |
| if (! mpfr_equal_p (z, x) || mpfr_nanflag_p ()) |
| { |
| printf ("Error in mpfr_copysign (%c1250, %c1717)\n", |
| i ? '-' : '+', j ? '-' : '+'); |
| exit (1); |
| } |
| } |
| |
| mpfr_clear (x); |
| mpfr_clear (y); |
| mpfr_clear (z); |
| |
| tests_end_mpfr (); |
| return 0; |
| } |