[wasm] Use MachineOperator::Float64Log to implement kExprF64Log.

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 778 matching lines @@
     }
     case wasm::kExprF64Sin: {
       return BuildF64Sin(input);
     }
     case wasm::kExprF64Tan: {
       return BuildF64Tan(input);
     }
     case wasm::kExprF64Exp: {
       return BuildF64Exp(input);
     }
-    case wasm::kExprF64Log: {
-      return BuildF64Log(input);
-    }
+    case wasm::kExprF64Log:
+      op = m->Float64Log();
+      break;
     case wasm::kExprI32ConvertI64:
       op = m->TruncateInt64ToInt32();
       break;
     case wasm::kExprI64SConvertI32:
       op = m->ChangeInt32ToInt64();
       break;
     case wasm::kExprI64UConvertI32:
       op = m->ChangeUint32ToUint64();
       break;
     case wasm::kExprF64ReinterpretI64:
@@ skipping 564 matching lines @@
   return BuildCFuncInstruction(ref, type, input);
 }
 
 Node* WasmGraphBuilder::BuildF64Exp(Node* input) {
   MachineType type = MachineType::Float64();
   ExternalReference ref =
       ExternalReference::f64_exp_wrapper_function(jsgraph()->isolate());
   return BuildCFuncInstruction(ref, type, input);
 }
 
-Node* WasmGraphBuilder::BuildF64Log(Node* input) {
-  MachineType type = MachineType::Float64();
-  ExternalReference ref =
-      ExternalReference::f64_log_wrapper_function(jsgraph()->isolate());
-  return BuildCFuncInstruction(ref, type, input);
-}
-
 Node* WasmGraphBuilder::BuildF64Atan2(Node* left, Node* right) {
   MachineType type = MachineType::Float64();
   ExternalReference ref =
       ExternalReference::f64_atan2_wrapper_function(jsgraph()->isolate());
   return BuildCFuncInstruction(ref, type, left, right);
 }
 
 Node* WasmGraphBuilder::BuildF64Pow(Node* left, Node* right) {
   MachineType type = MachineType::Float64();
   ExternalReference ref =
@@ skipping 1902 matching lines @@
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8