[Mesa-dev] [PATCH] r600g: fix vs export count

[Vadim Girlin]

On Fri, 2011-07-29 at 12:20 +0100, Dave Airlie wrote:
> On Thu, Jul 28, 2011 at 9:33 PM, Vadim Girlin <vadimgirlin at gmail.com> wrote:
> > Fixes https://bugs.freedesktop.org/show_bug.cgi?id=39572
> 
> Hi Vadim,
> 
> has this passed a full piglit run without regression?
> 
> Dave.

Hi Dave.

I've tested this patch with r600.tests on evergreen without
regressions. 

I have no r6xx/7xx hw to test, so I'm not sure about that part, but the
patch is based on the info from R6xx_3D_Registers.pdf: "VS_EXPORT_COUNT
5:1 0x0 Number of vectors exported by the VS (value is minus 1)". 

I have forgotten to mention that it's tested on evergreen only in the
patch comment, sorry.

The problem in the bug was the shader with noutput==1. I don't think
"noutput-2" is correct in that case for r6xx/7xx too. Though now I think
it may be safer to handle noutput==1 as special case if this patch
causes problems.

Vadim