From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 78161] New: [NV96] Artifacts in output of fragment program containing not unrolled loops with conditional break Date: Thu, 01 May 2014 15:29:05 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1084794575==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Nouveau" To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============1084794575== Content-Type: multipart/alternative; boundary="1398958145.eFF51a0.22614"; charset="us-ascii" --1398958145.eFF51a0.22614 Date: Thu, 1 May 2014 15:29:05 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=78161 Priority: medium Bug ID: 78161 Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Summary: [NV96] Artifacts in output of fragment program containing not unrolled loops with conditional break Severity: normal Classification: Unclassified OS: Linux (All) Reporter: gzregozrw-5tc4TXWwyLM@public.gmane.org Hardware: x86-64 (AMD64) Status: NEW Version: git Component: Drivers/DRI/nouveau Product: Mesa Created attachment 98301 --> https://bugs.freedesktop.org/attachment.cgi?id=98301&action=edit apitrace of simple test program. Problem appear in shaders containing loops with conditional break when loop is not unrolled by nouveau. I checked emitted code with ST_DEBUG=tgsi NV50_PROG_DEBUG=1. Tested with Mesa 10.2.0-devel (git-475f5ff) from 2014-04-30. This bug exists for more than year, I first saw it in 2013-02. I think that artifacts appear in areas where is big difference in number of iterations executed for pixel before breaking from loop. -- You are receiving this mail because: You are the assignee for the bug. --1398958145.eFF51a0.22614 Date: Thu, 1 May 2014 15:29:05 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"
Priority medium
Bug ID 78161
Assignee nouveau@lists.freedesktop.org
Summary [NV96] Artifacts in output of fragment program containing not unrolled loops with conditional break
Severity normal
Classification Unclassified
OS Linux (All)
Reporter gzregozrw@wp.pl
Hardware x86-64 (AMD64)
Status NEW
Version git
Component Drivers/DRI/nouveau
Product Mesa 

Created attachment 98301 [details]
apitrace of simple test program.

Problem appear in shaders containing loops with conditional break when loop is
not unrolled by nouveau. I checked emitted code with ST_DEBUG=tgsi
NV50_PROG_DEBUG=1.
Tested with Mesa 10.2.0-devel (git-475f5ff) from 2014-04-30.
This bug exists for more than year, I first saw it in 2013-02.
I think that artifacts appear in areas where is big difference in number of
iterations executed for pixel before breaking from loop.

You are receiving this mail because:
  • You are the assignee for the bug.
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