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/* Generic test file for functions with one mpfr_t argument.
Copyright 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */
/* define TWO_ARGS for two-argument functions like mpfr_pow */
#define TGENERIC_FAIL(S, X, U) \
do \
{ \
printf ("%s\nx = ", (S)); \
mpfr_out_str (stdout, 2, 0, (X), GMP_RNDN); \
printf ("\n"); \
if (U) \
{ \
printf ("u = "); \
mpfr_out_str (stdout, 2, 0, (U), GMP_RNDN); \
printf ("\n"); \
} \
printf ("yprec = %u, rnd_mode = %s, inexact = %d, flags = %u\n", \
(unsigned int) yprec, mpfr_print_rnd_mode (rnd), compare, \
(unsigned int) __gmpfr_flags); \
exit (1); \
} \
while (0)
#undef TGENERIC_CHECK
#if defined(TWO_ARGS)
#define TGENERIC_CHECK(S, EXPR) \
do if (!(EXPR)) TGENERIC_FAIL (S, x, u); while (0)
#else
#define TGENERIC_CHECK(S, EXPR) \
do if (!(EXPR)) TGENERIC_FAIL (S, x, 0); while (0)
#endif
#if DEBUG_TGENERIC
#define STR(F) #F
#define TGENERIC_IAUX(F,P,X,U) \
do \
{ \
printf ("tgeneric: testing function " STR(F) \
", %s, target prec = %lu\nx = ", \
mpfr_print_rnd_mode (rnd), (unsigned long) (P)); \
mpfr_out_str (stdout, 2, 0, (X), GMP_RNDN); \
printf ("\n"); \
if (U) \
{ \
printf ("u = "); \
mpfr_out_str (stdout, 2, 0, (U), GMP_RNDN); \
printf ("\n"); \
} \
} \
while (0)
#undef TGENERIC_INFO
#if defined(TWO_ARGS)
#define TGENERIC_INFO(F,P) TGENERIC_IAUX(F,P,x,u)
#else
#define TGENERIC_INFO(F,P) TGENERIC_IAUX(F,P,x,0)
#endif
#endif
static void
test_generic (mp_prec_t p0, mp_prec_t p1, unsigned int N)
{
mp_prec_t prec, xprec, yprec;
mpfr_t x, y, z, t;
#ifdef TWO_ARGS
mpfr_t u;
#endif
mp_rnd_t rnd;
int inexact, compare, compare2;
unsigned int n;
mpfr_init (x);
mpfr_init (y);
mpfr_init (z);
mpfr_init (t);
#ifdef TWO_ARGS
mpfr_init (u);
#endif
/* generic test */
for (prec = p0; prec <= p1; prec++)
{
mpfr_set_prec (z, prec);
mpfr_set_prec (t, prec);
yprec = prec + 10;
mpfr_set_prec (y, yprec);
for (n = 0; n < N; n++)
{
xprec = prec;
if (randlimb () & 1)
{
xprec *= (double) randlimb () / MP_LIMB_T_MAX;
if (xprec < MPFR_PREC_MIN)
xprec = MPFR_PREC_MIN;
}
mpfr_set_prec (x, xprec);
#ifdef TWO_ARGS
mpfr_set_prec (u, xprec);
#endif
#if defined(RAND_FUNCTION)
RAND_FUNCTION (x);
#ifdef TWO_ARGS
RAND_FUNCTION (u);
#endif
#else
tests_default_random (x);
#ifdef TWO_ARGS
tests_default_random (u);
#endif
#endif
rnd = (mp_rnd_t) RND_RAND ();
mpfr_clear_flags ();
#ifdef DEBUG_TGENERIC
TGENERIC_INFO (TEST_FUNCTION, MPFR_PREC (y));
#endif
#if defined(TWO_ARGS)
compare = TEST_FUNCTION (y, x, u, rnd);
#else
compare = TEST_FUNCTION (y, x, rnd);
#endif
TGENERIC_CHECK ("Bad inexact flag",
(compare != 0) ^ (mpfr_inexflag_p () == 0));
if (MPFR_IS_SINGULAR (y))
{
if (MPFR_IS_NAN (y) || mpfr_nanflag_p ())
TGENERIC_CHECK ("Bad NaN flag",
MPFR_IS_NAN (y) && mpfr_nanflag_p ());
else if (MPFR_IS_INF (y))
TGENERIC_CHECK ("Bad overflow flag",
(compare != 0) ^ (mpfr_overflow_p () == 0));
else if (MPFR_IS_ZERO (y))
TGENERIC_CHECK ("Bad underflow flag",
(compare != 0) ^ (mpfr_underflow_p () == 0));
}
else if (mpfr_overflow_p ())
{
TGENERIC_CHECK ("Bad compare value (overflow)", compare != 0);
mpfr_nexttoinf (y);
TGENERIC_CHECK ("Should have been max MPFR number",
MPFR_IS_INF (y));
}
else if (mpfr_underflow_p ())
{
TGENERIC_CHECK ("Bad compare value (underflow)", compare != 0);
mpfr_nexttozero (y);
TGENERIC_CHECK ("Should have been min MPFR number",
MPFR_IS_ZERO (y));
}
else if (mpfr_can_round (y, yprec, rnd, rnd, prec))
{
mpfr_set (t, y, rnd);
#ifdef DEBUG_TGENERIC
TGENERIC_INFO (TEST_FUNCTION, MPFR_PREC (z));
#endif
#if defined(TWO_ARGS)
inexact = TEST_FUNCTION (z, x, u, rnd);
#else
inexact = TEST_FUNCTION (z, x, rnd);
#endif
if (mpfr_erangeflag_p ())
continue;
if (mpfr_nan_p (z) || mpfr_cmp (t, z) != 0)
{
printf ("results differ for x=");
mpfr_out_str (stdout, 2, xprec, x, GMP_RNDN);
#ifdef TWO_ARGS
printf ("\nu=");
mpfr_out_str (stdout, 2, xprec, u, GMP_RNDN);
#endif
printf (" prec=%u rnd_mode=%s\n", (unsigned) prec,
mpfr_print_rnd_mode (rnd));
printf ("got ");
mpfr_out_str (stdout, 2, prec, z, GMP_RNDN);
puts ("");
printf ("expected ");
mpfr_out_str (stdout, 2, prec, t, GMP_RNDN);
puts ("");
printf ("approx ");
mpfr_print_binary (y);
puts ("");
exit (1);
}
compare2 = mpfr_cmp (t, y);
/* if rounding to nearest, cannot know the sign of t - f(x)
because of composed rounding: y = o(f(x)) and t = o(y) */
if (compare * compare2 >= 0)
compare = compare + compare2;
else
compare = inexact; /* cannot determine sign(t-f(x)) */
if (((inexact == 0) && (compare != 0)) ||
((inexact > 0) && (compare <= 0)) ||
((inexact < 0) && (compare >= 0)))
{
printf ("Wrong inexact flag for rnd=%s: expected %d, got %d"
"\n", mpfr_print_rnd_mode (rnd), compare, inexact);
printf ("x="); mpfr_print_binary (x); puts ("");
#ifdef TWO_ARGS
printf ("u="); mpfr_print_binary (u); puts ("");
#endif
printf ("y="); mpfr_print_binary (y); puts ("");
printf ("t="); mpfr_print_binary (t); puts ("");
exit (1);
}
}
}
}
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
mpfr_clear (t);
#ifdef TWO_ARGS
mpfr_clear (u);
#endif
}
#undef RAND_FUNCTION
#undef TWO_ARGS
#undef TWO_ARGS_UI
#undef TEST_FUNCTION
#undef test_generic
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