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Bug 1162738 - pixman's vmx fast paths broken on ppc64le
Summary: pixman's vmx fast paths broken on ppc64le
Alias: None
Product: Fedora
Classification: Fedora
Component: pixman
Version: 21
Hardware: ppc64le
OS: Unspecified
Target Milestone: ---
Assignee: Adam Jackson
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: F-ExcludeArch-ppc64le, PPC64LETracker
TreeView+ depends on / blocked
Reported: 2014-11-11 15:32 UTC by Adam Jackson
Modified: 2015-08-14 08:54 UTC (History)
4 users (show)

Fixed In Version: 0.33.2
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2015-08-14 08:54:48 UTC

Attachments (Terms of Use)
pixman_ppc64le_no_vec_lvsl_warning.patch (deleted)
2014-11-26 10:46 UTC, Michel Normand
no flags Details | Diff

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]

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:

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

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