[llvm] [RISCV][llvm] Support VFADD, VFSUB, VFMUL codegen for Zvfbfa (PR #170612)

[Luke Lau via llvm-commits]

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@@ -523,6 +523,71 @@ multiclass VPatConversionVF_WF_BF16<string intrinsic, string instruction,
   }
 }
 
+multiclass VPatBinaryFPSDNode_VV_VF_RM_BF16<SDPatternOperator vop,
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lukel97 wrote:

Instead of creating new pattern multiclasses, can we move them into `VPatBinaryFPSDNode_VV_VF_RM`? That way we don't need to `defm` everything again

https://github.com/llvm/llvm-project/pull/170612