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Re: [PATCH] i386: move ULPs to i686 and regenerate new ones for i586

On 2015-12-03 22:28, Joseph Myers wrote:
> On Thu, 3 Dec 2015, Aurelien Jarno wrote:
> > The i386 ULPs are actually the i686 ones. The i586 results are slightly
> > less precise. Therefore move the current ULPs to the i386/i686 directory
> > and generate i586 ones for the i386 directory.
> Are you sure they are i686 ones rather than actually i686+SSE2 (does 
> --disable-multi-arch make any difference)?

You are actually correct, the current sysdeps/i386/fpu/libm-test-ulps
file corresponds to the i686+SSE2 ULPs.

Also the i586 and i686 ULPs are actually the same.

> > Note: In theory we should even put the i486 ULPs in the i386 directory
> > and put the i586 ones in the i386/i586 directory. Not sure it is worth
> > it.
> There are no i586-specific libm function implementations, so there should 
> be no difference in ulps between glibc built for i486 and i586.
> If test inputs can be found that, built for i686, generate the higher ulps 
> seen when building for pre-i686, that would reduce the number of variant 
> ulps files needing regeneration.

Ok, I'll try that, but between i686 and i686+SSE2.


Aurelien Jarno                          GPG: 4096R/1DDD8C9B       

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