[Mesa-dev] Precision of float and trigonometric functions on i965

[Ilia Mirkin]

On Thu, Dec 11, 2014 at 2:10 PM, Chris Forbes <chrisf at ijw.co.nz> wrote:
> Iago,
>
> This doesn't matter for GL conformance -- but the impression I get is
> that dEQP is aiming at something more.
>
> In any case, the usual problem with this is inaccurate range
> reduction, which is fixable in software at some performance cost. The
> C library does this, for example.

Probably related to this:

https://randomascii.wordpress.com/2014/10/09/intel-underestimates-error-bounds-by-1-3-quintillion/