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

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1333 matching lines @@
 
 static void f64_exp_wrapper(double* param) {
   WriteDoubleValue(param, std::exp(ReadDoubleValue(param)));
 }
 
 ExternalReference ExternalReference::f64_exp_wrapper_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_exp_wrapper)));
 }
 
-static void f64_log_wrapper(double* param) {
-  WriteDoubleValue(param, std::log(ReadDoubleValue(param)));
-}
-
-ExternalReference ExternalReference::f64_log_wrapper_function(
-    Isolate* isolate) {
-  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_log_wrapper)));
-}
-
 static void f64_pow_wrapper(double* param0, double* param1) {
   WriteDoubleValue(param0, power_double_double(ReadDoubleValue(param0),
                                                ReadDoubleValue(param1)));
 }
 
 ExternalReference ExternalReference::f64_pow_wrapper_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_pow_wrapper)));
 }
 
@@ skipping 733 matching lines @@
 
 
 void Assembler::DataAlign(int m) {
   DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
   while ((pc_offset() & (m - 1)) != 0) {
     db(0);
   }
 }
 }  // namespace internal
 }  // namespace v8