diff options
Diffstat (limited to 'tests/tfmma.c')
| -rw-r--r-- | tests/tfmma.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/tfmma.c b/tests/tfmma.c index a4243cca2..34567bd5a 100644 --- a/tests/tfmma.c +++ b/tests/tfmma.c @@ -577,6 +577,26 @@ bug20200206 (void) mpfr_set_emin (emin); } +/* check for integer overflow (see bug fixed in r13798) */ +static void +extreme_underflow (void) +{ + mpfr_t x, y, z; + mpfr_exp_t emin = mpfr_get_emin (); + + set_emin (MPFR_EMIN_MIN); + mpfr_inits2 (64, x, y, z, (mpfr_ptr) 0); + mpfr_set_ui_2exp (x, 1, MPFR_EMIN_MIN - 1, MPFR_RNDN); + mpfr_set (y, x, MPFR_RNDN); + mpfr_nextabove (x); + mpfr_clear_flags (); + mpfr_fmms (z, x, x, y, y, MPFR_RNDN); + MPFR_ASSERTN (__gmpfr_flags == (MPFR_FLAGS_UNDERFLOW | MPFR_FLAGS_INEXACT)); + MPFR_ASSERTN (MPFR_IS_ZERO (z) && MPFR_IS_POS (z)); + mpfr_clears (x, y, z, (mpfr_ptr) 0); + set_emin (emin); +} + /* Test double-rounding cases in mpfr_set_1_2, which is called when all the precisions are the same. With set.c before r13347, this triggers errors for neg=0. */ @@ -655,6 +675,7 @@ main (int argc, char *argv[]) half_plus_half (); bug20170405 (); double_rounding (); + extreme_underflow (); tests_end_mpfr (); return 0; |