[Bug 90580] New: [HSW bisected] integer multiplication bug

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90580

            Bug ID: 90580
           Summary: [HSW bisected] integer multiplication bug
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: lemody at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Shader doing integer multiplication fails like this:

--- 8< ---
shader_runner: brw_ir_fs.h:195: fs_reg half(fs_reg, unsigned int): Assertion
`!"Cannot take half of this register type"' failed.
Aborted (core dumped)


Bisected to:

commit 4ec09c77471e39e6ff81c99f1edde2e1713a7f24
Author: Matt Turner <mattst88 at gmail.com>
Date:   Tue May 12 15:51:44 2015 -0700

    i965/fs: Support integer multiplication in SIMD16 on Haswell.

    Ivybridge (and presumably Baytrail) have a bug that prevents this from
    working.

    Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.com>

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