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Ryan Houdek
92d0344d6a
When this instruction returns the index in to the ecx register, this is defined as a 32-bit result. This means it actually gets zero-extended to the full 64-bit GPR size on 64-bit processes. Previously FEX was doing a 32-bit insert which leaves garbage data in the upper 32-bits of the RCX register. Adds a unit test to ensure the result is zero extended. Fixes running Java games under FEX now that SSE4.2 is exposed.