1 /* tsgn -- Test for the sign of a floating point number.
3 Copyright 2003, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramel projects, INRIA.
6 This file is part of the GNU MPFR Library.
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
26 #include "mpfr-test.h"
36 if ((mpfr_sgn) (x) != 0 || mpfr_sgn (x) != 0)
38 printf("Sgn error for 0.\n");
43 if ((mpfr_sgn) (x) != 1 || mpfr_sgn (x) != 1)
45 printf("Sgn error for +Inf.\n");
50 if ((mpfr_sgn) (x) != -1 || mpfr_sgn (x) != -1)
52 printf("Sgn error for -Inf.\n");
57 if ((mpfr_sgn) (x) != 0 || !mpfr_erangeflag_p ())
59 printf("Sgn error for NaN.\n");
63 if (mpfr_sgn (x) != 0 || !mpfr_erangeflag_p ())
65 printf("Sgn error for NaN.\n");
80 for(i = 0 ; i < 100 ; i++)
82 mpfr_urandomb (x, RANDS);
94 if (s1 < -1 || s1 > 1)
96 printf("Error for sgn: out of range.\n");
99 else if (MPFR_IS_NAN(x) || MPFR_IS_ZERO(x))
103 printf("Error for sgn: Nan or Zero should return 0.\n");
109 printf("Error for sgn. Return %d instead of %d.\n", s1, s2);
122 main (int argc, char *argv[])