| Bug ID | 94091 |
|---|---|
| Summary | Tonga unreal elemental segfault since radeonsi: put image, fmask, and sampler descriptors into one array |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | adf.lists@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 121675 [details] gdb bt R9285 since mesa commit below Unreal ElementalDemo quits at start with a segfault. gdb from demo generated core attached commit 7aedbbacae6d3ec3d06735fff2eb662964773ad2 Author: Marek Olšák <marek.olsak@amd.com> Date: Sat Feb 6 22:09:45 2016 +0100 radeonsi: put image, fmask, and sampler descriptors into one array The texture slot is expanded to 16 dwords containing 2 descriptors. Those can be: - Image and fmask, or - Image and sampler state By carefully choosing the locations, we can put all three into one slot, with the fmask and sampler state being mutually exclusive. This improves shaders in 2 ways: - 2 user SGPRs are unused, shaders can use them as temporary registers now - each pair of descriptors is always on the same cache line v2: cosmetic changes: add back v8i32, don't load a sampler state & fmask at the same time
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