X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=mpfr%2Ftests%2Ftdiv_d.c;fp=mpfr%2Ftests%2Ftdiv_d.c;h=ca22d2632861e0647d8e87538b35f5532170eb87;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/mpfr/tests/tdiv_d.c b/mpfr/tests/tdiv_d.c new file mode 100644 index 00000000..ca22d263 --- /dev/null +++ b/mpfr/tests/tdiv_d.c @@ -0,0 +1,137 @@ +/* Test file for mpfr_div_d + +Copyright 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 +#include +#include + +#include "mpfr-test.h" + +#if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0) + +static void +check_nans (void) +{ + mpfr_t x, y; + int inexact; + + mpfr_init2 (x, 123); + mpfr_init2 (y, 123); + + /* nan / 1.0 is nan */ + mpfr_set_nan (x); + mpfr_clear_flags (); + inexact = mpfr_div_d (y, x, 1.0, GMP_RNDN); + MPFR_ASSERTN (inexact == 0); + MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0); + MPFR_ASSERTN (mpfr_nan_p (y)); + + /* +inf / 1.0 == +inf */ + mpfr_set_inf (x, 1); + mpfr_clear_flags (); + inexact = mpfr_div_d (y, x, 1.0, GMP_RNDN); + MPFR_ASSERTN (inexact == 0); + MPFR_ASSERTN (__gmpfr_flags == 0); + MPFR_ASSERTN (mpfr_inf_p (y)); + MPFR_ASSERTN (MPFR_IS_POS (y)); + + /* -inf / 1.0 == -inf */ + mpfr_set_inf (x, -1); + mpfr_clear_flags (); + inexact = mpfr_div_d (y, x, 1.0, GMP_RNDN); + MPFR_ASSERTN (inexact == 0); + MPFR_ASSERTN (__gmpfr_flags == 0); + MPFR_ASSERTN (mpfr_inf_p (y)); + MPFR_ASSERTN (MPFR_IS_NEG (y)); + + /* 0.0 / 0.0 is nan */ + mpfr_set_d (x, 0.0, GMP_RNDN); + mpfr_clear_flags (); + inexact = mpfr_div_d (y, x, 0.0, GMP_RNDN); + MPFR_ASSERTN (inexact == 0); + MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0); + MPFR_ASSERTN (mpfr_nan_p (y)); + + mpfr_clear (x); + mpfr_clear (y); +} + +#define TEST_FUNCTION mpfr_sub_d +#define DOUBLE_ARG2 +#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1) +#include "tgeneric.c" + +int +main (void) +{ + mpfr_t x, y, z; + double d; + int inexact; + + tests_start_mpfr (); + + /* check with enough precision */ + mpfr_init2 (x, IEEE_DBL_MANT_DIG); + mpfr_init2 (y, IEEE_DBL_MANT_DIG); + mpfr_init2 (z, IEEE_DBL_MANT_DIG); + + mpfr_set_str (y, "4096", 10, GMP_RNDN); + d = 0.125; + mpfr_clear_flags (); + inexact = mpfr_div_d (x, y, d, GMP_RNDN); + if (inexact != 0) + { + printf ("Inexact flag error in mpfr_div_d\n"); + exit (1); + } + mpfr_set_str (z, "32768", 10, GMP_RNDN); + if (mpfr_cmp (z, x)) + { + printf ("Error in mpfr_div_d ("); + mpfr_out_str (stdout, 10, 0, y, GMP_RNDN); + printf (" + %.20g)\nexpected ", d); + mpfr_out_str (stdout, 10, 0, z, GMP_RNDN); + printf ("\ngot "); + mpfr_out_str (stdout, 10, 0, x, GMP_RNDN); + printf ("\n"); + exit (1); + } + mpfr_clears (x, y, z, (mpfr_ptr) 0); + + check_nans (); + + test_generic (2, 1000, 100); + + tests_end_mpfr (); + return 0; +} + +#else + +int +main (void) +{ + printf ("Warning! Test disabled for this MPFR version.\n"); + return 0; +} + +#endif