Add OpAtomicCompareExchange tests

[jlegg0]

It would be nice if there were Vulkan tests for the OpAtomicCompareExchange and OpAtomicCompareExchangeWeak instructions. The other atomic instructions are tested on images in dEQP-VK.image.atomic_operations.

[alegal-arm]

@jlegg0, have you looked into dEQP-VK.spirv_assembly.instruction.compute.opatomic* tests?
They already cover OpAtomicCompareExchange.

OpAtomicCompareExchangeWeak requires Kernel capability which is not exposed in Vulkan.

[jlegg0]

On Wed, 2017-06-21 at 16:12 -0700, Alexander Galazin wrote:

@jlegg0, have you looked into dEQP-
VK.spirv_assembly.instruction.compute.opatomic* tests?

These tests operate on BufferBlock structures. I'ld specifically like a
test for OpAtomicCompareExchange on images, as that didn't work in
Mesa.

They already cover OpAtomicCompareExchange.

True. Sorry, I should have been more specific in my original request.

OpAtomicCompareExchangeWeak requires Kernel capability which is not
exposed in Vulkan.

I see. Fair enough.

[alegal-arm]

Thanks for the report. This is tracked internally. If you are able to develop and contribute such test we would be glad to review and accept it.

[alegal-arm]

Tests for OpAtomicCompareExchange on images added in f669677