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| author | Geoffrey Keating <geoffk@apple.com> | 2005-01-07 00:19:23 +0000 |
|---|---|---|
| committer | Geoffrey Keating <geoffk@gcc.gnu.org> | 2005-01-07 00:19:23 +0000 |
| commit | 59d7d7678602bb8dcbeff337a44efc76a3451f01 (patch) | |
| tree | 0320e08704708cbe4172df7b2f48317ed8252f47 /gcc/c-cppbuiltin.c | |
| parent | 44d0e0415d3bad044a3850f97dac948963505ebe (diff) | |
| download | gcc-59d7d7678602bb8dcbeff337a44efc76a3451f01.zip gcc-59d7d7678602bb8dcbeff337a44efc76a3451f01.tar.gz gcc-59d7d7678602bb8dcbeff337a44efc76a3451f01.tar.bz2 | |
c-cppbuiltin.c (builtin_define_float_constants): Set __*_EPSILON__ for IBM long double format correctly.
* c-cppbuiltin.c (builtin_define_float_constants): Set __*_EPSILON__
for IBM long double format correctly.
From-SVN: r93021
Diffstat (limited to 'gcc/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-cppbuiltin.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c index cedf9e7..2c9039e 100644 --- a/gcc/c-cppbuiltin.c +++ b/gcc/c-cppbuiltin.c @@ -219,7 +219,12 @@ builtin_define_float_constants (const char *name_prefix, const char *fp_suffix, /* The difference between 1 and the least value greater than 1 that is representable in the given floating point type, b**(1-p). */ sprintf (name, "__%s_EPSILON__", name_prefix); - sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b); + if (fmt->pnan < fmt->p) + /* This is an IBM extended double format, so 1.0 + any double is + representable precisely. */ + sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b); + else + sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b); builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix); /* For C++ std::numeric_limits<T>::denorm_min. The minimum denormalized |