diff options
Diffstat (limited to 'stdio-common')
| -rw-r--r-- | stdio-common/printf_fp.c | 13 | ||||
| -rw-r--r-- | stdio-common/tfformat.c | 19 |
2 files changed, 30 insertions, 2 deletions
diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c index 5cf60f131c..009bdee0d5 100644 --- a/stdio-common/printf_fp.c +++ b/stdio-common/printf_fp.c @@ -625,11 +625,22 @@ __printf_fp (FILE *fp, /* All factors but 10^-1 are tested now. */ if (exponent > 0) { + int cnt_l; + cy = __mpn_mul_1 (tmp, frac, fracsize, 10); tmpsize = fracsize; assert (cy == 0 || tmp[tmpsize - 1] < 20); - (void) __mpn_rshift (frac, tmp, tmpsize, MIN (4, exponent)); + count_trailing_zeros (cnt_l, tmp[0]); + if (cnt_l < MIN (4, exponent)) + { + cy = __mpn_lshift (frac, tmp, tmpsize, + BITS_PER_MP_LIMB - MIN (4, exponent)); + if (cy != 0) + frac[tmpsize++] = cy; + } + else + (void) __mpn_rshift (frac, tmp, tmpsize, MIN (4, exponent)); fracsize = tmpsize; exp10 |= 1; assert (frac[fracsize - 1] < 10); diff --git a/stdio-common/tfformat.c b/stdio-common/tfformat.c index 02230f11ba..60785d803f 100644 --- a/stdio-common/tfformat.c +++ b/stdio-common/tfformat.c @@ -10,7 +10,7 @@ typedef struct const char *format_string; } sprint_double_type; -sprint_double_type sprint_doubles[] = +sprint_double_type sprint_doubles[] = { __LINE__, 30.3, "< +30.3>", "<%+15.10g>", __LINE__, 10.0, "<10.00>", "<%5.2f>", @@ -4071,6 +4071,23 @@ int main() testcount++; } + /* And one special test. */ + { + const char ref[] = "1.7763568394002504646778106689453125e-15"; + int i; + d = 1.0; + for (i = 1; i < 50; ++i) + d /= 2; + sprintf (buffer, "%.100g", d); + if (!matches (buffer, ref)) + { + ++errcount; + printf ( + "Error in line %d using \"%s\". Result is \"%s\"; should be: \"%s\".\n", + __LINE__, "%.100g", buffer, ref); + } + } + if (errcount == 0) { printf("Encountered no errors in %d tests.\n", testcount); |