diff options
Diffstat (limited to 'stdio-common/printf_fp.c')
| -rw-r--r-- | stdio-common/printf_fp.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c index 9240355d31..85286bec15 100644 --- a/stdio-common/printf_fp.c +++ b/stdio-common/printf_fp.c @@ -812,13 +812,24 @@ __printf_fp (FILE *fp, { char *tp = cp; - if (digit == '5') + if (digit == '5' && (*(cp - 1) & 1) == 0) /* This is the critical case. */ if (fracsize == 1 && frac[0] == 0) /* Rest of the number is zero -> round to even. (IEEE 754-1985 4.1 says this is the default rounding.) */ - if ((*(cp - 1) & 1) == 0) - goto do_expo; + goto do_expo; + else if (scalesize == 0) + { + /* Here we have to see whether all limbs are zero since no + normalization happened. */ + size_t lcnt = fracsize; + while (lcnt >= 1 && frac[lcnt - 1] == 0) + --lcnt; + if (lcnt == 0) + /* Rest of the number is zero -> round to even. + (IEEE 754-1985 4.1 says this is the default rounding.) */ + goto do_expo; + } if (fracdig_no > 0) { |