[Piglit] [PATCH] Test dependency hints on exp2 instructions.

[Eric Anholt]

Mike Stroyan <mike at lunarg.com> writes:

> Reviewed-by: Mike Stroyan <mike at lunarg.com>
>
> That does show the math dependency problem.
> The same problem can also be demonstrated with other math opcodes than exp2.

And, now that we've got a nice testcase, it was easy to hack up the
driver to test that the effect really is math-specific (just replace the
generator's math1 with, say, brw_FRC()).
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