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Diffstat (limited to 'mpfr/tests/tfma.c')
| -rw-r--r-- | mpfr/tests/tfma.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/mpfr/tests/tfma.c b/mpfr/tests/tfma.c new file mode 100644 index 000000000..540203422 --- /dev/null +++ b/mpfr/tests/tfma.c @@ -0,0 +1,302 @@ +/* Test file for mpfr_fma. + +Copyright (C) 2001 Free Software Foundation. +Adapted from tarctan.c. + +This file is part of the MPFR Library. + +The 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 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 MPFR Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +MA 02111-1307, USA. */ + +#include <stdio.h> +#include <limits.h> +#include <stdlib.h> +#include <gmp.h> +#include "gmp-impl.h" +#include <mpfr.h> +#include "mpfr-impl.h" + + +int +main (int argc, char *argv[]) +{ + mpfr_t x, y,z,s; + mpfr_init (x); + mpfr_init (s); + mpfr_init (y); + mpfr_init (z); + + + MPFR_SET_NAN(x); + mpfr_random(y); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in x=NAN does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(x); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(z); + + MPFR_SET_NAN(y); + mpfr_random(x); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in y=NAN does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(x); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(z); + + MPFR_SET_NAN(z); + mpfr_random(y); + mpfr_random(x); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in z=NAN does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(x); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(z); + + MPFR_SET_INF(x); + MPFR_SET_ZERO(y); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in x=INF y=0 does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_INF(y); + MPFR_SET_ZERO(x); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in x=0 y=INF does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_INF(x); + mpfr_random(y); + MPFR_SET_INF(z); + if((MPFR_SIGN(x) * MPFR_SIGN(y)) == MPFR_SIGN(z)) + MPFR_CHANGE_SIGN(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in x=INF z=(-sign(x)*sign(y))INF does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_INF(y); + mpfr_random(x); + MPFR_SET_INF(z); + if((MPFR_SIGN(x) * MPFR_SIGN(y)) == MPFR_SIGN(z)) + MPFR_CHANGE_SIGN(z); + + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_NAN(s)) + { + printf ("evaluation of function in y=INF z=(-sign(x)*sign(y))INF does not return NAN"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_INF(x); + mpfr_random(y); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_INF(s)) + { + printf ("evaluation of function in x=INF does not return INF"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_INF(y); + mpfr_random(x); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_INF(s)) + { + printf ("evaluation of function in y=INF does not return INF"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_INF(z); + mpfr_random(x); + mpfr_random(y); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(!MPFR_IS_INF(s)) + { + printf ("evaluation of function in z=INF does not return INF"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_ZERO(x); + mpfr_random(y); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(mpfr_cmp(s,z)!=0) + { + printf ("evaluation of function in x=0 does not return z\n"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + MPFR_SET_ZERO(y); + mpfr_random(x); + mpfr_random(z); + mpfr_fma (s,x, y,z, GMP_RNDN); + if(mpfr_cmp(s,z)!=0) + { + printf ("evaluation of function in y=0 does not return z\n"); + exit (1); + } + + MPFR_CLEAR_FLAGS(z); + MPFR_CLEAR_FLAGS(y); + MPFR_CLEAR_FLAGS(x); + + { + mp_prec_t prec; + mpfr_t t, slong; + mp_rnd_t rnd; + int inexact, compare; + unsigned int n; + + int p0=1; + int p1=200; + int N=200; + + mpfr_init (t); + mpfr_init (slong); + + /* generic test */ + for (prec = p0; prec <= p1; prec++) + { + mpfr_set_prec (x, prec); + mpfr_set_prec (y, prec); + mpfr_set_prec (z, prec); + mpfr_set_prec (s, prec); + mpfr_set_prec (t, prec); + + for (n=0; n<N; n++) + { + + mpfr_random (x); + mpfr_random (y); + mpfr_random (z); + + if (random() % 2) + mpfr_neg (x, x, GMP_RNDN); + if (random() % 2) + mpfr_neg (y, y, GMP_RNDN); + if (random() % 2) + mpfr_neg (z, z, GMP_RNDN); + + rnd = random () % 4; + mpfr_set_prec (slong, 2 * prec); + if (mpfr_mul (slong, x, y, rnd)) + { + fprintf (stderr, "x*y should be exact\n"); + exit (1); + } + compare = mpfr_add (t, slong, z, rnd); + inexact = mpfr_fma (s, x, y, z, rnd); + if (mpfr_cmp (s, t)) + { + printf ("results differ for x="); + mpfr_out_str (stdout, 2, prec, x, GMP_RNDN); + printf (" y="); + mpfr_out_str (stdout, 2, prec, y, GMP_RNDN); + printf (" z="); + mpfr_out_str (stdout, 2, prec, z, GMP_RNDN); + printf (" prec=%u rnd_mode=%s\n", (unsigned) prec, + mpfr_print_rnd_mode (rnd)); + printf ("got "); + mpfr_out_str (stdout, 2, prec, s, GMP_RNDN); + putchar ('\n'); + printf ("expected "); + mpfr_out_str (stdout, 2, prec, t, GMP_RNDN); + putchar ('\n'); + printf ("approx "); + mpfr_print_raw (slong); + putchar ('\n'); + exit (1); + } + if (((inexact == 0) && (compare != 0)) || + ((inexact < 0) && (compare >= 0)) || + ((inexact > 0) && (compare <= 0))) + { + fprintf (stderr, "Wrong inexact flag for rnd=%s: expected %d, got %d\n", + mpfr_print_rnd_mode (rnd), compare, inexact); + exit (1); + } + } + } + mpfr_clear (t); + mpfr_clear (slong); + + } + mpfr_clear (x); + mpfr_clear (y); + mpfr_clear (z); + mpfr_clear (s); + + return 0; +} |