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| author | Jonathan Wakely <jwakely@redhat.com> | 2022-03-08 12:15:55 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-03-10 11:49:00 +0000 |
| commit | cfaa2fac42f6f4bddb197dc1fc601f2ba136f9f0 (patch) | |
| tree | e14f4bae63b4bafcc423677896bfb42451b8ca52 | |
| parent | d563b0bff19c31eb755c026ee990bca986683f25 (diff) | |
| download | gcc-cfaa2fac42f6f4bddb197dc1fc601f2ba136f9f0.zip gcc-cfaa2fac42f6f4bddb197dc1fc601f2ba136f9f0.tar.gz gcc-cfaa2fac42f6f4bddb197dc1fc601f2ba136f9f0.tar.bz2 | |
libstdc++: Support VAX floats in std::strong_order
The VAX float and double format does not support NaN, so the
std::partial_ordering returned by <=> will never be 'unordered'. We can
just use the partial_ordering value as the strong_ordering.
libstdc++-v3/ChangeLog:
* libsupc++/compare (_Strong_ordering::_S_fp_cmp) [__vax__]: Use
<=> comparison.
| -rw-r--r-- | libstdc++-v3/libsupc++/compare | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libstdc++-v3/libsupc++/compare b/libstdc++-v3/libsupc++/compare index 050cf7e..3c22d9a 100644 --- a/libstdc++-v3/libsupc++/compare +++ b/libstdc++-v3/libsupc++/compare @@ -843,6 +843,11 @@ namespace std static constexpr strong_ordering _S_fp_cmp(_Tp __x, _Tp __y) noexcept { +#ifdef __vax__ + // VAX format has no NaN, only "excess" for Inf, so totally ordered. + return __builtin_bit_cast(strong_ordering, __x <=> __y); +#endif + auto __ix = _S_fp_bits(__x); auto __iy = _S_fp_bits(__y); |