[wasm] Use a C wrapper function to calculate F64Pow.

src/compiler/wasm-compiler.cc

 // Copyright 2015 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.
 
 #include "src/compiler/wasm-compiler.h"
 
 #include "src/isolate-inl.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/base/platform/platform.h"
@@ skipping 591 matching lines @@
       break;
     case wasm::kExprF32Min:
       return BuildF32Min(left, right);
     case wasm::kExprF64Min:
       return BuildF64Min(left, right);
     case wasm::kExprF32Max:
       return BuildF32Max(left, right);
     case wasm::kExprF64Max:
       return BuildF64Max(left, right);
     case wasm::kExprF64Pow:
-      op = m->Float64Pow();
-      break;
+      return BuildF64Pow(left, right);
     case wasm::kExprF64Atan2:
       op = m->Float64Atan2();
       break;
     case wasm::kExprF64Mod:
       return BuildF64Mod(left, right);
     case wasm::kExprI32AsmjsDivS:
       return BuildI32AsmjsDivS(left, right);
     case wasm::kExprI32AsmjsDivU:
       return BuildI32AsmjsDivU(left, right);
     case wasm::kExprI32AsmjsRemS:
@@ skipping 859 matching lines @@
   return BuildCFuncInstruction(ref, type, input);
 }
 
 Node* WasmGraphBuilder::BuildF64Asin(Node* input) {
   MachineType type = MachineType::Float64();
   ExternalReference ref =
       ExternalReference::f64_asin_wrapper_function(jsgraph()->isolate());
   return BuildCFuncInstruction(ref, type, input);
 }
 
+Node* WasmGraphBuilder::BuildF64Pow(Node* left, Node* right) {
+  MachineType type = MachineType::Float64();
+  ExternalReference ref =
+      ExternalReference::wasm_float64_pow(jsgraph()->isolate());
+  return BuildCFuncInstruction(ref, type, left, right);
+}
+
 Node* WasmGraphBuilder::BuildF64Mod(Node* left, Node* right) {
   MachineType type = MachineType::Float64();
   ExternalReference ref =
       ExternalReference::f64_mod_wrapper_function(jsgraph()->isolate());
   return BuildCFuncInstruction(ref, type, left, right);
 }
 
 Node* WasmGraphBuilder::BuildCFuncInstruction(ExternalReference ref,
                                               MachineType type, Node* input0,
                                               Node* input1) {
@@ skipping 2158 matching lines @@
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8