diff options
Diffstat (limited to 'tests/tpow_all.c')
| -rw-r--r-- | tests/tpow_all.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tests/tpow_all.c b/tests/tpow_all.c index c755aba23..d1a6ba153 100644 --- a/tests/tpow_all.c +++ b/tests/tpow_all.c @@ -436,6 +436,22 @@ underflow_up1 (int extended_emin) mpfr_clears (delta, x, y, z, z0, (mpfr_ptr) 0); } +/* With pow.c r5497, the following test fails on a 64-bit Linux machine + * due to a double-rounding problem when rescaling the result: + * Error with underflow_up2 and extended emin + * x = 7.fffffffffffffff0@-1, + * y = 4611686018427387904, GMP_RNDN + * Expected 1.0000000000000000@-1152921504606846976, inex = 1, flags = 9 + * Got 0, inex = -1, flags = 9 + * With pow_ui.c r5423, the following test fails on a 64-bit Linux machine + * as underflows and overflows are not handled correctly (the approximation + * error is ignored): + * Error with mpfr_pow_ui, flags cleared + * x = 7.fffffffffffffff0@-1, + * y = 4611686018427387904, GMP_RNDN + * Expected 1.0000000000000000@-1152921504606846976, inex = 1, flags = 9 + * Got 0, inex = -1, flags = 9 + */ static void underflow_up2 (int extended_emin) { |