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| author | Joseph Myers <joseph@codesourcery.com> | 2012-11-22 14:58:41 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-11-22 14:58:41 +0000 |
| commit | 1468ded38eb043991b3b0198ab55cacffb46ec04 (patch) | |
| tree | 7ed374414c31cb98f23d12e93c118287bb81f300 | |
| parent | 8e27e3cc453849158e069dbed0eea7b8113ab8ff (diff) | |
| download | glibc-1468ded38eb043991b3b0198ab55cacffb46ec04.zip glibc-1468ded38eb043991b3b0198ab55cacffb46ec04.tar.gz glibc-1468ded38eb043991b3b0198ab55cacffb46ec04.tar.bz2 | |
Fix ldbl-128ibm hypotl internal underflows (bug 14869).
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | math/libm-test.inc | 3 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/e_hypotl.c | 2 |
4 files changed, 10 insertions, 2 deletions
@@ -1,5 +1,10 @@ 2012-11-22 Joseph Myers <joseph@codesourcery.com> + [BZ #14869] + * sysdeps/ieee754/ldbl-128ibm/e_hypotl.c (__ieee754_hypotl): Scale + up arguments below 2**-450, not just those below 2**-500. + * math/libm-test.inc (hypot_test): Add another test. + [BZ #14868] * sysdeps/ieee754/ldbl-128ibm/e_hypotl.c (__ieee754_hypotl): Return a+b for ratio over 2**120, not 2**60. @@ -21,7 +21,7 @@ Version 2.17 14638, 14645, 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719, 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14805, 14807, 14809, 14811, 14815, 14821, 14822, 14824, 14828, - 14831, 14835, 14838, 14856, 14863, 14865, 14866, 14868. + 14831, 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869. * Port to ARM AArch64 contributed by Linaro. diff --git a/math/libm-test.inc b/math/libm-test.inc index 21f4646..b96f1bf 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -5731,6 +5731,9 @@ hypot_test (void) TEST_ff_f (hypot, 0.75L, 1.25L, 1.45773797371132511771853821938639577L); TEST_ff_f (hypot, 1.0L, 0x1p-61L, 1.0L); +#if defined TEST_LDOUBLE && LDBL_MANT_DIG >= 106 + TEST_ff_f (hypot, 0x1.23456789abcdef0123456789ab8p-500L, 0x1.23456789abcdef0123456789ab8p-500L, 4.9155782399407039128612180934736799735113e-151L); +#endif #if !(defined TEST_FLOAT && defined TEST_INLINE) TEST_ff_f (hypot, 0x3p125L, 0x4p125L, 0x5p125L); diff --git a/sysdeps/ieee754/ldbl-128ibm/e_hypotl.c b/sysdeps/ieee754/ldbl-128ibm/e_hypotl.c index ce21194..768bd3b 100644 --- a/sysdeps/ieee754/ldbl-128ibm/e_hypotl.c +++ b/sysdeps/ieee754/ldbl-128ibm/e_hypotl.c @@ -83,7 +83,7 @@ __ieee754_hypotl(long double x, long double y) k += 600; kld = two600; } - if(hb < 0x20b0000000000000LL) { /* b < 2**-500 */ + if(hb < 0x23d0000000000000LL) { /* b < 2**-450 */ if(hb <= 0x000fffffffffffffLL) { /* subnormal b or 0 */ u_int64_t low; GET_LDOUBLE_LSW64(low,b); |