diff options
| author | paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-10-11 10:57:40 +0000 |
|---|---|---|
| committer | paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-10-11 10:57:40 +0000 |
| commit | d4a627f3c9e95c844f08902a339cb5b092fa2e27 (patch) | |
| tree | af6cc51f4876ec81b86bbe16b497e6e4e0cf52d8 /gcc/c-family/c-pretty-print.c | |
| parent | dc78196b1a0856aa5551fd449b960cc168041188 (diff) | |
| download | gcc-d4a627f3c9e95c844f08902a339cb5b092fa2e27.tar.gz | |
2011-10-11 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/33067
* c-family/c-pretty-print.c (pp_c_floating_constant): Output
max_digits10 (in the ISO C++ WG N1822 sense) decimal digits.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@179797 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/c-family/c-pretty-print.c')
| -rw-r--r-- | gcc/c-family/c-pretty-print.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/c-family/c-pretty-print.c b/gcc/c-family/c-pretty-print.c index 53d39d643d0..91195613ff1 100644 --- a/gcc/c-family/c-pretty-print.c +++ b/gcc/c-family/c-pretty-print.c @@ -1018,8 +1018,20 @@ pp_c_enumeration_constant (c_pretty_printer *pp, tree e) static void pp_c_floating_constant (c_pretty_printer *pp, tree r) { + const struct real_format *fmt + = REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (r))); + + REAL_VALUE_TYPE floating_cst = TREE_REAL_CST (r); + bool is_decimal = floating_cst.decimal; + + /* See ISO C++ WG N1822. Note: The fraction 643/2136 approximates + log10(2) to 7 significant digits. */ + int max_digits10 = 2 + (is_decimal ? fmt->p : fmt->p * 643L / 2136); + real_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_REAL_CST (r), - sizeof (pp_buffer (pp)->digit_buffer), 0, 1); + sizeof (pp_buffer (pp)->digit_buffer), + max_digits10, 1); + pp_string (pp, pp_buffer(pp)->digit_buffer); if (TREE_TYPE (r) == float_type_node) pp_character (pp, 'f'); |