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Re: Patch to fix _mm_sqrt_sd intrinsic


On Wed, 2005-08-24 at 20:13 -0700, Richard Henderson wrote:
> On Wed, Aug 24, 2005 at 05:45:20PM -0700, Fariborz Jahanian wrote:
> > The Intel reference manuals say it shall be this:
> > 
> >      __m128d _mm_sqrt_sd( __m128d );
> 
> Not the one I'm looking at, it doesn't.
> 
>   __m128d __mm_sqrt_sd (__m128d a, __m128d)
> 
>   Computes the square root of the lower DP FP value of b.
>   The upper DP FP value is passed through from a.
> 
>     r0 := sqrt(b0)
>     r1 := a1
> 

same here for 9.0 (the latest):

__m128d _mm_sqrt_sd(__m128d a, __m128d b)

Computes the square root of the lower DP FP value of b. The upper DP FP
value is passed through from a.
r0 := sqrt(b0)
r1 := a1

(file:///opt/intel/cc/9.0/doc/main_cls/mergedProjects/cref_cls/common/comm1037.htm, for those who installed it in the default place)


> Inconveniently, Intel has put no version number on this document that
> I can find.  I *think* it's from the icc 8.0 release, but I'm not sure.
> I can tell you that I downloaded it 2005-01-09.  If someone has access
> to all icc releases, sha1 is 
> 
> 659d543b59c03d8d0e025f50006e72342f708986  c_ug_lnx.pdf
> 
> That should match some release and we can put an upper bound on the
> latest icc release it could have come from.
> 
> 
> 
> r~


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