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Re: Changing the default i387 precision
On Sat, May 04, 2013 at 07:14:00AM -0400, Greg Troxel wrote:
> So are you proposing then
> 1) Make gcc and clang use larger storage (maybe already true) and avoid
> SSE instructions for variables declared as long double?
That's already the case. long double computations always use the i387.
The point is that I want them to get the extended precision.
> 2) Add functions in libm so that instead of float/double versions we
> will have float/double/long double versions of each function?
That is also somewhat independent and necessary for full C++11 support,
but with the current way it is almost useless as the only benefit is a
wider exponent range.
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