[PATCH] [AArch64] Handle vec4 sitofp and uitofp for half

[Pirama Arumuga Nainar]

IIUC, this patch shouldn't affect v4i32 to v4f32 or v4f64 operations, but couldn't find any tests for those operations. I confirmed that locally, and can add tests with this patch if requested.

In a test of v4f16 operations (similar to the comprehensive test in http://reviews.llvm.org/D8648), only sitofp and uitofp cause problems, and will be fixed with this patch.


http://reviews.llvm.org/D9166

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