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Bug 1162738

Summary: pixman's vmx fast paths broken on ppc64le
Product: [Fedora] Fedora Reporter: Adam Jackson <ajax>
Component: pixmanAssignee: Adam Jackson <ajax>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 21CC: ajax, dan, normand, rdossant
Target Milestone: ---   
Target Release: ---   
Hardware: ppc64le   
OS: Unspecified   
Whiteboard:
Fixed In Version: 0.33.2 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-14 08:54:48 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1051573    
Attachments:
Description Flags
pixman_ppc64le_no_vec_lvsl_warning.patch none

Description Adam Jackson 2014-11-11 15:32:37 UTC 
I've disabled them in the spec file for F21+ (as of 0.32.6-4.fc21), but if you build with them enabled and run 'make check' you'll notice a bunch of stuff failing.  This manifests in X as (for example) the address bar in yelp being painted black.

The fast paths themselves live in pixman/pixman-vmx.c, and if I had to guess at where to start fixing things I'd look at splat_alpha() which I think is making some (big-endian) assumptions about vector layout.
Comment 2 Michel Normand 2014-11-26 10:46:54 UTC 
Created attachment 961594 [details]
pixman_ppc64le_no_vec_lvsl_warning.patch
Comment 3 Michel Normand 2014-11-26 10:49:02 UTC 
for information, I am still investigating the problem but with no success yet.

* I have a pixman_ppc64le_no_vec_lvsl_warning.patch that only avoid warning at compilation time. (appended in comment 2)
* I am still trying to find a simple test to gdb to understand the errors reported by make check.
Comment 4 Rafael Fonseca 2015-08-13 15:13:31 UTC 
What is the current status of this bug?
Comment 5 Michel Normand 2015-08-13 17:54:11 UTC 
(In reply to Rafael Fonseca from comment #4)
> What is the current status of this bug?

I do not work anymore on this one, so do not know the status.
Comment 6 Rafael Fonseca 2015-08-14 08:54:48 UTC 
Looking at the package's changelog:

%changelog
* Sun Aug 09 2015 Oded Gabbay <oded.gabbay> 0.33.2-1
- pixman 0.33.2
- Enable VMX fast paths on ppc64le now that they are fixed