[Bug 105950] radeonsi: OpenCL not working correctly on a big endian machine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105950

            Bug ID: 105950
           Summary: radeonsi: OpenCL not working correctly on a big endian
                    machine
           Product: Mesa
           Version: 17.3
          Hardware: PowerPC
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: bas at daedalean.ai
        QA Contact: dri-devel at lists.freedesktop.org

Running any OpenCL program on a big endian machine using a radeonsi card fails.

- union si_vgt_param_key uses a bitfield shared with a 32 bit value. This
causes the index to be wrong on a big endian machine, and crashes any OpenCL
program with a segfault.
- si_setup_user_sgprs_co_v2 in si_compute.c fills a dispatch_packet struct with
values which are uploaded to the GPU. To ensure this works correctly, these
values need to be converted to little endian.

I'll send patches to the mesa-dev list for both these issues.

Bas Vermeulen

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