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Re: libmvec, non-finites and fast-math

On Tue, 2 Aug 2016, Julian Taylor wrote:

> On 02.08.2016 17:52, Joseph Myers wrote:
> > On Tue, 2 Aug 2016, Julian Taylor wrote:
> > 
> >> So now how to solve this problem. My suggestion would be to relax the
> >> requirements for vectorizing the math functions to -funsafe-math-optimizations
> >> instead of -ffast-math, at least when glibc or svml are the backends.
> > 
> > There is currently no GCC predefined macro for 
> > -funsafe-math-optimizations, so such a condition is not possible with 
> > current GCC.
> > 
> 
> It is GCC that decides to use the vectorized function in the first place
> so that should not be a problem. Or am I misunderstanding how these
> functions get called?

See the __FAST_MATH__ conditional in sysdeps/x86/fpu/bits/math-vector.h.

-- 
Joseph S. Myers
joseph@codesourcery.com
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