diff options
| author | Jerry Quinn <jlquinn@optonline.net> | 2003-03-22 04:57:46 +0000 |
|---|---|---|
| committer | Jerry Quinn <jlquinn@gcc.gnu.org> | 2003-03-22 04:57:46 +0000 |
| commit | 442c0874ea857deaed375a626f848ac97a4fbcaf (patch) | |
| tree | f76ebc4c815b88c0e3338e18655c64f0fec362b2 | |
| parent | d9b2742a3d4bfc03500e14e4e9bcc7ae9275a079 (diff) | |
| download | gcc-442c0874ea857deaed375a626f848ac97a4fbcaf.zip gcc-442c0874ea857deaed375a626f848ac97a4fbcaf.tar.gz gcc-442c0874ea857deaed375a626f848ac97a4fbcaf.tar.bz2 | |
re PR libstdc++/5730 (complex<double>::norm() -- huge slowdown from egcs-2.91.66)
2003-03-21 Jerry Quinn <jlquinn@optonline.net>
PR libstdc++/5730
* include/bits/c++config (_GLIBCPP_FAST_MATH): Define.
* include/std/std_complex.h (norm): Use faster,
less accurate computation for builtin float types under --fast-math.
From-SVN: r64701
| -rw-r--r-- | libstdc++-v3/ChangeLog | 7 | ||||
| -rw-r--r-- | libstdc++-v3/include/bits/c++config | 7 | ||||
| -rw-r--r-- | libstdc++-v3/include/std/std_complex.h | 2 |
3 files changed, 15 insertions, 1 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 71793c6..30583b0 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,10 @@ +2003-03-21 Jerry Quinn <jlquinn@optonline.net> + + PR libstdc++/5730 + * include/bits/c++config (_GLIBCPP_FAST_MATH): Define. + * include/std/std_complex.h (norm): Use faster, + less accurate computation for builtin float types under --fast-math. + 2003-03-21 Magnus Fromreide <gnats@magfr.user.lysator.liu.se> * testsuite/testsuite_hooks.h: Fix warning nits. diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config index f833b41..829fe7e 100644 --- a/libstdc++-v3/include/bits/c++config +++ b/libstdc++-v3/include/bits/c++config @@ -87,6 +87,13 @@ #error __USE_MALLOC should never be defined. Read the release notes. #endif +// Create a boolean flag to be used to determine if --fast-math is set. +#ifdef __FAST_MATH__ +#define _GLIBCPP_FAST_MATH 1 +#else +#define _GLIBCPP_FAST_MATH 0 +#endif + // The remainder of the prewritten config is mostly automatic; all the // user hooks are listed above. diff --git a/libstdc++-v3/include/std/std_complex.h b/libstdc++-v3/include/std/std_complex.h index 955a12c..87e4bcb 100644 --- a/libstdc++-v3/include/std/std_complex.h +++ b/libstdc++-v3/include/std/std_complex.h @@ -456,7 +456,7 @@ namespace std inline _Tp norm(const complex<_Tp>& __z) { - return _Norm_helper<__is_floating<_Tp>::_M_type>::_S_do_it(__z); + return _Norm_helper<__is_floating<_Tp>::_M_type && !_GLIBCPP_FAST_MATH>::_S_do_it(__z); } template<typename _Tp> |