diff options
Diffstat (limited to 'gcc/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-cppbuiltin.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c index 4e671d6..8573b8c 100644 --- a/gcc/c-cppbuiltin.c +++ b/gcc/c-cppbuiltin.c @@ -193,6 +193,16 @@ builtin_define_float_constants (const char *name_prefix, const char *fp_suffix, if (i < n) *p++ = "08ce"[n - i]; sprintf (p, "p%d", fmt->emax * fmt->log2_b); + if (fmt->pnan < fmt->p) + { + /* This is an IBM extended double format made up of two IEEE + doubles. The value of the long double is the sum of the + values of the two parts. The most significant part is + required to be the value of the long double rounded to the + nearest double. Rounding means we need a slightly smaller + value for LDBL_MAX. */ + buf[4 + fmt->pnan / 4] = "7bde"[fmt->pnan % 4]; + } } sprintf (name, "__%s_MAX__", name_prefix); builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix); |