[X86][AVX512] add intrinsics of Scalar FP to integer conversion with rounding mode

Differential Revision: http://reviews.llvm.org/D16629

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260033 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed