Simon Pilgrim 6ebf741ea2 [X86][SSE] Improved support for vector i16 to float conversions.
Added explicit sign extension for v4i16/v8i16 to v4i32/v8i32 before conversion to floats. Matches existing support for v4i8/v8i8.

Follow up to D10433


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239966 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-17 22:43:34 +00:00
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