diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | stdlib/strtod_l.c | 11 |
3 files changed, 13 insertions, 4 deletions
@@ -11,6 +11,10 @@ * localedata/tst-langinfo.sh: Send output to stdout. * localedata/tst-langinfo-static.c: New file. + [BZ #16965] + * stdlib/strtod_l.c (round_and_return): Add code to shift limbs + when the shift amount is modulo the limb size. + 2014-05-20 Richard Henderson <rth@redhat.com> [BZ #16967] @@ -18,7 +18,7 @@ Version 2.20 16760, 16770, 16786, 16789, 16791, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16849, 16854, 16876, 16877, 16885, 16888, 16890, 16912, 16915, 16916, 16917, 16922, 16927, 16928, 16932, 16943, 16958, 16966, - 16967. + 16967, 16965. * The minimum Linux kernel version that this version of the GNU C Library can be used with is 2.6.32. diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c index 6707e482a4..3c449c7d54 100644 --- a/stdlib/strtod_l.c +++ b/stdlib/strtod_l.c @@ -243,9 +243,14 @@ round_and_return (mp_limb_t *retval, intmax_t exponent, int negative, more_bits |= ((round_limb & ((((mp_limb_t) 1) << round_bit) - 1)) != 0); - (void) __mpn_rshift (retval, &retval[shift / BITS_PER_MP_LIMB], - RETURN_LIMB_SIZE - (shift / BITS_PER_MP_LIMB), - shift % BITS_PER_MP_LIMB); + /* __mpn_rshift requires 0 < shift < BITS_PER_MP_LIMB. */ + if ((shift % BITS_PER_MP_LIMB) != 0) + (void) __mpn_rshift (retval, &retval[shift / BITS_PER_MP_LIMB], + RETURN_LIMB_SIZE - (shift / BITS_PER_MP_LIMB), + shift % BITS_PER_MP_LIMB); + else + for (i = 0; i < RETURN_LIMB_SIZE - (shift / BITS_PER_MP_LIMB); i++) + retval[i] = retval[i + (shift / BITS_PER_MP_LIMB)]; MPN_ZERO (&retval[RETURN_LIMB_SIZE - (shift / BITS_PER_MP_LIMB)], shift / BITS_PER_MP_LIMB); } |