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

src/compiler/arm64/code-generator-arm64.cc

 // Copyright 2014 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/arm64/frames-arm64.h"
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 774 matching lines @@
           frame_access_state()->GetFrameOffset(i.InputInt32(0));
       Register base;
       if (offset.from_stack_pointer()) {
         base = __ StackPointer();
       } else {
         base = fp;
       }
       __ Add(i.OutputRegister(0), base, Operand(offset.offset()));
       break;
     }
+    case kIeee754Float64Log: {
+      FrameScope scope(masm(), StackFrame::MANUAL);
+      DCHECK(d0.is(i.InputDoubleRegister(0)));
+      DCHECK(d0.is(i.OutputDoubleRegister()));
+      __ CallCFunction(ExternalReference::ieee754_log_function(isolate()), 0,
+                       1);
+      break;
+    }
     case kArm64Float32RoundDown:
       __ Frintm(i.OutputFloat32Register(), i.InputFloat32Register(0));
       break;
     case kArm64Float64RoundDown:
       __ Frintm(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kArm64Float32RoundUp:
       __ Frintp(i.OutputFloat32Register(), i.InputFloat32Register(0));
       break;
     case kArm64Float64RoundUp:
@@ skipping 438 matching lines @@
       break;
     case kArm64Float64Min:
       // (a < b) ? a : b
       __ Fcmp(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
       __ Fcsel(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
                i.InputDoubleRegister(1), lo);
       break;
     case kArm64Float64Abs:
       __ Fabs(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
-    case kArm64Float64Log: {
-      // TODO(dcarney): implement directly. See note in lithium-codegen-arm64.cc
-      FrameScope scope(masm(), StackFrame::MANUAL);
-      DCHECK(d0.is(i.InputDoubleRegister(0)));
-      DCHECK(d0.is(i.OutputDoubleRegister()));
-      // TODO(dcarney): make sure this saves all relevant registers.
-      __ CallCFunction(ExternalReference::math_log_double_function(isolate()),
-                       0, 1);
-      break;
-    }
     case kArm64Float64Neg:
       __ Fneg(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kArm64Float64Sqrt:
       __ Fsqrt(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
     case kArm64Float32ToFloat64:
       __ Fcvt(i.OutputDoubleRegister(), i.InputDoubleRegister(0).S());
       break;
     case kArm64Float64ToFloat32:
@@ skipping 662 matching lines @@
       padding_size -= kInstructionSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8