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Commit 930ebc15 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] negateFMAOpcode - extend to support FMADDSUB/FMSUBADD and output negation. NFCI. 

Some prep work for PR42863, this change allows us to move all the FMA opcode mappings into the negateFMAOpcode helper.

For the FMADDSUB/FMSUBADD cases, we can only negate the accumulator - any other negations will result in an error.

llvm-svn: 371840
parent 9eaa981e
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