[X86] Fix fptoui conversions
This fixes two issues in x86 fptoui lowering.
1) Makes conversions from f80 go through the right path on AVX-512.
2) Implements an inline sequence for fptoui i64 instead of a library
call. This improves performance by 6X on SSE3+ and 3X otherwise.
Incidentally, it also removes the use of ftol2 for fptoui, which was
wrong to begin with, as ftol2 converts to a signed i64, producing
wrong results for values >= 2^63.
Patch by: mitch.l.bodart@intel.com
Differential Revision: http://reviews.llvm.org/D11316
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245924
91177308-0d34-0410-b5e6-
96231b3b80d8
projects / oota-llvm.git / commit