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

src/compiler/ia32/instruction-scheduler-ia32.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/instruction-scheduler.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 28 matching lines @@
     case kIA32SubPair:
     case kIA32MulPair:
     case kIA32ShlPair:
     case kIA32ShrPair:
     case kIA32SarPair:
     case kIA32Ror:
     case kIA32Lzcnt:
     case kIA32Tzcnt:
     case kIA32Popcnt:
     case kIA32Lea:
-    case kX87Float64Log:
     case kSSEFloat32Cmp:
     case kSSEFloat32Add:
     case kSSEFloat32Sub:
     case kSSEFloat32Mul:
     case kSSEFloat32Div:
     case kSSEFloat32Max:
     case kSSEFloat32Min:
     case kSSEFloat32Abs:
     case kSSEFloat32Neg:
     case kSSEFloat32Sqrt:
@@ skipping 86 matching lines @@
 
 
 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
   // TODO(all): Add instruction cost modeling.
   return 1;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8