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

src/crankshaft/x64/lithium-codegen-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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/crankshaft/x64/lithium-codegen-x64.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 4675 matching lines @@
     __ jmp(&done, Label::kNear);
 
     if (can_convert_undefined_to_nan) {
       __ bind(&convert);
 
       // Convert undefined (and hole) to NaN. Compute NaN as 0/0.
       __ CompareRoot(input_reg, Heap::kUndefinedValueRootIndex);
       DeoptimizeIf(not_equal, instr,
                    DeoptimizeReason::kNotAHeapNumberUndefined);
 
-      __ Pcmpeqd(result_reg, result_reg);
+      __ xorpd(result_reg, result_reg);

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

Please use Xorpd and Divsd here.

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

Done.

+      __ divsd(result_reg, result_reg);
       __ jmp(&done, Label::kNear);
     }
   } else {
     DCHECK(mode == NUMBER_CANDIDATE_IS_SMI);
   }
 
   // Smi to XMM conversion
   __ bind(&load_smi);
   __ SmiToInteger32(kScratchRegister, input_reg);
   __ Cvtlsi2sd(result_reg, kScratchRegister);
@@ skipping 859 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64