[arm64] Implement Float(32|64)(Min|Max) using fcsel.

src/compiler/instruction-codes.h

 // 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.
 
 #ifndef V8_COMPILER_INSTRUCTION_CODES_H_
 #define V8_COMPILER_INSTRUCTION_CODES_H_
 
 #include <iosfwd>
 
 #if V8_TARGET_ARCH_ARM
@@ skipping 80 matching lines @@
   ADDRESSING_MODE_LIST(DECLARE_ADDRESSING_MODE)
 #undef DECLARE_ADDRESSING_MODE
 #define COUNT_ADDRESSING_MODE(Name) +1
   kLastAddressingMode = -1 ADDRESSING_MODE_LIST(COUNT_ADDRESSING_MODE)
 #undef COUNT_ADDRESSING_MODE
 };
 
 std::ostream& operator<<(std::ostream& os, const AddressingMode& am);
 
 // The mode of the flags continuation (see below).
-enum FlagsMode { kFlags_none = 0, kFlags_branch = 1, kFlags_set = 2 };
+enum FlagsMode {
+  kFlags_none = 0,
+  kFlags_branch = 1,
+  kFlags_set = 2,
+  kFlags_select = 3
+};
 
 std::ostream& operator<<(std::ostream& os, const FlagsMode& fm);
 
 // The condition of flags continuation (see below).
 enum FlagsCondition {
   kEqual,
   kNotEqual,
   kSignedLessThan,
   kSignedGreaterThanOrEqual,
   kSignedLessThanOrEqual,
@@ skipping 28 matching lines @@
 typedef BitField<AddressingMode, 8, 5> AddressingModeField;
 typedef BitField<FlagsMode, 13, 2> FlagsModeField;
 typedef BitField<FlagsCondition, 15, 4> FlagsConditionField;
 typedef BitField<int, 19, 13> MiscField;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_CODES_H_