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Summary: Clang's intrinsic header currently tries to negate the third operand of a vfmadd mask3 in order to create vfmsub, but this fails isel. This patch adds scalar vfmsub and vfnmsub mask3 that we can use instead to avoid the negate. This is consistent with the packed instructions. Reviewers: igorb, delena Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D25933 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285173 91177308-0d34-0410-b5e6-96231b3b80d8
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