[turbofan] Introduce new operators Float32SubPreserveNan and Float64SubPreserveNan for wasm.

src/compiler/raw-machine-assembler.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 381 matching lines @@
   UINTPTR_BINOP(Uint, GreaterThan);
 
 #undef UINTPTR_BINOP
 
   Node* Float32Add(Node* a, Node* b) {
     return AddNode(machine()->Float32Add(), a, b);
   }
   Node* Float32Sub(Node* a, Node* b) {
     return AddNode(machine()->Float32Sub(), a, b);
   }
+  Node* Float32SubPreserveNan(Node* a, Node* b) {
+    return AddNode(machine()->Float32SubPreserveNan(), a, b);
+  }
   Node* Float32Mul(Node* a, Node* b) {
     return AddNode(machine()->Float32Mul(), a, b);
   }
   Node* Float32Div(Node* a, Node* b) {
     return AddNode(machine()->Float32Div(), a, b);
   }
   Node* Float32Max(Node* a, Node* b) {
     return AddNode(machine()->Float32Max().op(), a, b);
   }
   Node* Float32Min(Node* a, Node* b) {
@@ skipping 18 matching lines @@
   Node* Float32GreaterThanOrEqual(Node* a, Node* b) {
     return Float32LessThanOrEqual(b, a);
   }
 
   Node* Float64Add(Node* a, Node* b) {
     return AddNode(machine()->Float64Add(), a, b);
   }
   Node* Float64Sub(Node* a, Node* b) {
     return AddNode(machine()->Float64Sub(), a, b);
   }
+  Node* Float64SubPreserveNan(Node* a, Node* b) {
+    return AddNode(machine()->Float64SubPreserveNan(), a, b);
+  }
   Node* Float64Mul(Node* a, Node* b) {
     return AddNode(machine()->Float64Mul(), a, b);
   }
   Node* Float64Div(Node* a, Node* b) {
     return AddNode(machine()->Float64Div(), a, b);
   }
   Node* Float64Mod(Node* a, Node* b) {
     return AddNode(machine()->Float64Mod(), a, b);
   }
   Node* Float64Max(Node* a, Node* b) {
@@ skipping 312 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_