diff options
Diffstat (limited to 'tests/tset_ld.c')
| -rw-r--r-- | tests/tset_ld.c | 76 |
1 files changed, 67 insertions, 9 deletions
diff --git a/tests/tset_ld.c b/tests/tset_ld.c index dbf806b0b..1e24aed18 100644 --- a/tests/tset_ld.c +++ b/tests/tset_ld.c @@ -1,6 +1,6 @@ /* Test file for mpfr_set_ld and mpfr_get_ld. -Copyright 2002, 2003, 2004 Free Software Foundation, Inc. +Copyright 2002, 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of the MPFR Library. @@ -23,6 +23,9 @@ MA 02111-1307, USA. */ #include <stdlib.h> #include <float.h> #include <time.h> +#if WITH_FPU_CONTROL +#include <fpu_control.h> +#endif #include "mpfr-test.h" @@ -57,13 +60,13 @@ Isnan_ld (long double d) static void check_set_get (long double d, mpfr_t x) { - mp_rnd_t r; + int r; long double e; int inex; for (r = 0; r < GMP_RND_MAX; r++) { - inex = mpfr_set_ld (x, d, r); + inex = mpfr_set_ld (x, d, (mp_rnd_t) r); if (inex != 0) { printf ("Error: mpfr_set_ld should be exact\n"); @@ -72,7 +75,7 @@ check_set_get (long double d, mpfr_t x) mpfr_dump (x); exit (1); } - e = mpfr_get_ld (x, r); + e = mpfr_get_ld (x, (mp_rnd_t) r); if (e != d && !(Isnan_ld(e) && Isnan_ld(d))) { printf ("Error: mpfr_get_ld o mpfr_set_ld <> Id\n"); @@ -87,6 +90,47 @@ check_set_get (long double d, mpfr_t x) } } +static void +test_small (void) +{ + mpfr_t x, y, z; + long double d; + + mpfr_init2 (x, 64); + mpfr_init2 (y, 64); + mpfr_init2 (z, 64); + + mpfr_set_str (x, "0.1010010100111100110000001110101101000111010110000001111101110011E-16381", 2, GMP_RNDN); + d = mpfr_get_ld (x, GMP_RNDN); /* infinite loop? */ + mpfr_set_ld (y, d, GMP_RNDN); + mpfr_sub (z, x, y, GMP_RNDN); + mpfr_abs (z, z, GMP_RNDN); + mpfr_clear_erangeflag (); + /* If long double = double, d should be equal to 0; + in this case, everything is OK. */ + if (d != 0 && (mpfr_cmp_str (z, "1E-16434", 2, GMP_RNDN) > 0 || + mpfr_erangeflag_p ())) + { + printf ("Error with x = "); + mpfr_out_str (NULL, 10, 20, x, GMP_RNDN); + printf (" = "); + mpfr_out_str (NULL, 16, 0, x, GMP_RNDN); + printf ("\n -> d = %.20Lg", d); + printf ("\n -> y = "); + mpfr_out_str (NULL, 10, 20, y, GMP_RNDN); + printf (" = "); + mpfr_out_str (NULL, 16, 0, y, GMP_RNDN); + printf ("\n -> |x-y| = "); + mpfr_out_str (NULL, 16, 0, z, GMP_RNDN); + printf ("\n"); + exit (1); + } + + mpfr_clear (x); + mpfr_clear (y); + mpfr_clear (z); +} + int main (int argc, char *argv[]) { @@ -94,6 +138,16 @@ main (int argc, char *argv[]) mpfr_t x; int i; mp_exp_t emax; +#if WITH_FPU_CONTROL + fpu_control_t cw; + + if (argc > 1) + { + cw = strtol(argv[1], NULL, 0); + printf ("FPU control word: 0x%x\n", (unsigned int) cw); + _FPU_SETCW (cw); + } +#endif check_gcc33_bug (); @@ -101,7 +155,7 @@ main (int argc, char *argv[]) mpfr_test_init (); tests_machine_prec_long_double (); - mpfr_init2 (x, 113); + mpfr_init2 (x, MPFR_LDBL_MANT_DIG); /* check +0.0 and -0.0 */ d = 0.0; @@ -144,7 +198,9 @@ main (int argc, char *argv[]) check_set_get (-d, x); /* checks the smallest power of two */ - d = 1.0; while ((e = d / 2.0) != (long double) 0.0) d = e; + d = 1.0; + while ((e = d / 2.0) != (long double) 0.0 && e != d) + d = e; check_set_get (d, x); check_set_get (-d, x); @@ -154,7 +210,7 @@ main (int argc, char *argv[]) /* checks that 2^i, 2^i+1 and 2^i-1 are correctly converted */ d = 1.0; - for (i = 1; i <= 113; i++) + for (i = 1; i < MPFR_LDBL_MANT_DIG; i++) { d = 2.0 * d; /* d = 2^i */ check_set_get (d, x); @@ -172,17 +228,19 @@ main (int argc, char *argv[]) /* check with reduced emax to exercise overflow */ emax = mpfr_get_emax (); mpfr_set_prec (x, 2); - mpfr_set_emax (1); + set_emax (1); mpfr_set_ld (x, (long double) 2.0, GMP_RNDN); MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0); for (d = (long double) 2.0, i = 0; i < 13; i++, d *= d); /* now d = 2^8192 */ mpfr_set_ld (x, d, GMP_RNDN); MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0); - mpfr_set_emax (emax); + set_emax (emax); mpfr_clear (x); + test_small (); + tests_end_mpfr (); return 0; |