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cafc85bf1e
It was hacky to use an opcode as a switch because it won't always match (rsqrte != sqrte), and it looks like we'll need to add more special casing per arch than I had hoped for. Eg, x86 will prefer a different NR estimate implementation. ARM will want to use it's 'step' instructions. There also don't appear to be any new estimate instructions in any arch in a long, long time. Altivec vloge and vexpte may have been the first and last in that field... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218698 91177308-0d34-0410-b5e6-96231b3b80d8
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