Hi,
there are a bunch of dEQP tests that check precision of trigonometric
functions and float qualifiers that fail on i965. The way these tests
usually operate is that they define a float (with a lowp, mediump or
highp precision qualifier) and assign the result of a trigonometric
function to it.
On 12/11/2014 11:59 AM, Iago Toral wrote:
That said, I also noticed that most of the errors reported are for
fairly big numbers, so I played a bit with some examples and noticed
that trigonometric functions lose more precision as their argument gets
bigger. If I pass arguments of a few thousand
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.
- Chris
On
On Thu, Dec 11, 2014 at 2:10 PM, Chris Forbes chr...@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
On Dec 11, 2014 11:13 AM, Ilia Mirkin imir...@alum.mit.edu wrote:
On Thu, Dec 11, 2014 at 2:10 PM, Chris Forbes chr...@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
