[wasm] Use the Float64Max/Min machine operators to implement F64Max/Min.

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 152 matching lines @@
  private:
   Register const result_;
 };
 
 
 class OutOfLineLoadNaN final : public OutOfLineCode {
  public:
   OutOfLineLoadNaN(CodeGenerator* gen, XMMRegister result)
       : OutOfLineCode(gen), result_(result) {}
 
-  void Generate() final { __ Pcmpeqd(result_, result_); }
+  void Generate() final {
+    __ xorpd(result_, result_);

[Benedikt Meurer, 2016/08/03 03:24:34]

Please use Xorpd and Divsd here.

[ahaas, 2016/08/03 07:17:14]

Done.

+    __ divsd(result_, result_);
+  }
 
  private:
   XMMRegister const result_;
 };
 
 
 class OutOfLineTruncateDoubleToI final : public OutOfLineCode {
  public:
   OutOfLineTruncateDoubleToI(CodeGenerator* gen, Register result,
                              XMMRegister input,
@@ skipping 2391 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8