[builtins] Introduce proper base::ieee754::log.

src/compiler/x64/code-generator-x64.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 822 matching lines @@
           frame_access_state()->GetFrameOffset(i.InputInt32(0));
       Register base;
       if (offset.from_stack_pointer()) {
         base = rsp;
       } else {
         base = rbp;
       }
       __ leaq(i.OutputRegister(), Operand(base, offset.offset()));
       break;
     }
+    case kIeee754Float64Log:
+      __ PrepareCallCFunction(1);
+      __ CallCFunction(ExternalReference::ieee754_log_function(isolate()), 1);
+      break;
     case kX64Add32:
       ASSEMBLE_BINOP(addl);
       break;
     case kX64Add:
       ASSEMBLE_BINOP(addq);
       break;
     case kX64Sub32:
       ASSEMBLE_BINOP(subl);
       break;
     case kX64Sub:
@@ skipping 148 matching lines @@
         __ Popcntq(i.OutputRegister(), i.InputOperand(0));
       }
       break;
     case kX64Popcnt32:
       if (instr->InputAt(0)->IsRegister()) {
         __ Popcntl(i.OutputRegister(), i.InputRegister(0));
       } else {
         __ Popcntl(i.OutputRegister(), i.InputOperand(0));
       }
       break;
-    case kX87Float64Log:
-      __ subq(rsp, Immediate(kDoubleSize));
-      __ Movsd(Operand(rsp, 0), i.InputDoubleRegister(0));
-      __ fldln2();
-      __ fld_d(Operand(rsp, 0));
-      __ fyl2x();
-      __ fstp_d(Operand(rsp, 0));
-      __ Movsd(i.OutputDoubleRegister(), Operand(rsp, 0));
-      __ addq(rsp, Immediate(kDoubleSize));
-      break;
     case kSSEFloat32Cmp:
       ASSEMBLE_SSE_BINOP(Ucomiss);
       break;
     case kSSEFloat32Add:
       ASSEMBLE_SSE_BINOP(addss);
       break;
     case kSSEFloat32Sub:
       ASSEMBLE_SSE_BINOP(subss);
       break;
     case kSSEFloat32Mul:
@@ skipping 1293 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8