[llvm] [SelectionDAG][RISCV] Operations with static rounding (PR #100999)

[Matt Arsenault via llvm-commits]

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@@ -411,6 +411,20 @@ enum NodeType {
   STRICT_FREM,
   STRICT_FMA,
 
+  /// Basic floating-point operations with statically specified control modes,
+  /// usually rounding. These have the same operands as the corresponding
+  /// default mode operations with an additional integer operand that represents
+  /// the specified modes in a target-dependent format.
+  FADD_MODE,
+  FSUB_MODE,
+  FMUL_MODE,
+  FDIV_MODE,
+  FSQRT_MODE,
+  FMA_MODE,
+  SINT_TO_FP_MODE,
+  UINT_TO_FP_MODE,
+  FP_ROUND_MODE,
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arsenm wrote:

Probably should name this with _ROUND suffix, to go along with FPTRUNC_ROUND (which is the same thing, and also has a corresponding IR intrinsic) 

https://github.com/llvm/llvm-project/pull/100999