[builtins] Migrate Math.log to TurboFan.

src/compiler/ia32/code-generator-ia32.cc

 // Copyright 2013 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/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 797 matching lines @@
       break;
     case kIA32Lzcnt:
       __ Lzcnt(i.OutputRegister(), i.InputOperand(0));
       break;
     case kIA32Tzcnt:
       __ Tzcnt(i.OutputRegister(), i.InputOperand(0));
       break;
     case kIA32Popcnt:
       __ Popcnt(i.OutputRegister(), i.InputOperand(0));
       break;
+    case kX87Float64Log:
+      __ sub(esp, Immediate(kDoubleSize));
+      __ movsd(Operand(esp, 0), i.InputDoubleRegister(0));
+      __ fldln2();
+      __ fld_d(Operand(esp, 0));
+      __ fyl2x();
+      __ fstp_d(Operand(esp, 0));
+      __ movsd(i.OutputDoubleRegister(), Operand(esp, 0));
+      __ add(esp, Immediate(kDoubleSize));
+      break;
     case kSSEFloat32Cmp:
       __ ucomiss(i.InputDoubleRegister(0), i.InputOperand(1));
       break;
     case kSSEFloat32Add:
       __ addss(i.InputDoubleRegister(0), i.InputOperand(1));
       break;
     case kSSEFloat32Sub:
       __ subss(i.InputDoubleRegister(0), i.InputOperand(1));
       break;
     case kSSEFloat32Mul:
@@ skipping 1129 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8