Hi,
I'm having a look to libstdc++/30482, which basically is C++ issue:
Jakub basically raises the issue of whether we want to use by default
the C99-conforming division in C++ too. Personally, I would be in favor
of enabling it unconditionally, modulo maybe a performance check
(Richard...).
On Thu, 5 Jul 2007, Paolo Carlini wrote:
Hi,
I'm having a look to libstdc++/30482, which basically is C++ issue: Jakub
basically raises the issue of whether we want to use by default the
C99-conforming division in C++ too. Personally, I would be in favor of
enabling it unconditionally,
Paolo Carlini wrote:
Therefore, I'm not sure... I would certainly like to see method 2
becoming the default everywhere, on the other hand, I'm not sure if
method 2 isn't too slow as default for C89 (outside fast-math, I
repeat). Shall we carry out performance tests perhaps, or peak
Mark Mitchell wrote:
To be clear, my preferences, from most preferable to least are:
* Method 2 is the default for all C variants, but can be overridden by
-ffast-math, or -fcomplex-method.
* Method 2 is the default for C99 and C++0x, but not for C89 or C++, but
can be overridden by
Hi Mark,
Paolo Carlini wrote:
Therefore, I'm not sure... I would certainly like to see method 2
becoming the default everywhere, on the other hand, I'm not sure if
method 2 isn't too slow as default for C89 (outside fast-math, I
repeat). Shall we carry out performance tests perhaps, or peak
Paolo Carlini wrote:
Ah, one final remark wrt C++0x: note that currently, irrespective of the
switches, there is *no way* for the user to choose method 2 in C++. I
think this is very bad in C++0x mode: essentially, as regards this
feature, it cannot track C99 as it *must*. I really hope we
On Thu, 5 Jul 2007, Paolo Carlini wrote:
Mark Mitchell wrote:
To be clear, my preferences, from most preferable to least are:
* Method 2 is the default for all C variants, but can be overridden by
-ffast-math, or -fcomplex-method.
* Method 2 is the default for C99 and C++0x, but not
Richard Guenther wrote:
Excellent. Let's see if we can have some performance numbers (from Richard ;)
Uh, I know of no thing that uses complex numbers and does not manually
implement them.
Crazy. I understand both in C and in C++, right?
Therefore, we should consider your observation
