Emulate MLS on pre-ARMv6T2. Cleaned up thumbee vs. thumb2 confusion.

src/globals.h

 // Copyright 2012 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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include "include/v8stdint.h"
 
 #include "src/base/build_config.h"
@@ skipping 598 matching lines @@
 // CPU feature flags.
 enum CpuFeature {
     // x86
     SSE4_1,
     SSE3,
     SAHF,
     // ARM
     VFP3,
     ARMv7,
     SUDIV,
+    MLS,
     UNALIGNED_ACCESSES,
     MOVW_MOVT_IMMEDIATE_LOADS,
     VFP32DREGS,
     NEON,
     // MIPS
     FPU,
     // ARM64
     ALWAYS_ALIGN_CSP,
     NUMBER_OF_CPU_FEATURES
 };
@@ skipping 128 matching lines @@
 enum MinusZeroMode {
   TREAT_MINUS_ZERO_AS_ZERO,
   FAIL_ON_MINUS_ZERO
 };
 
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_