ARM: Makefile/gyp update allowing better control of ARM specific options.

src/arm/assembler-arm.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 37 matching lines @@
 namespace internal {
 
 // CpuFeatures keeps track of which features are supported by the target CPU.
 // Supported features must be enabled by a CpuFeatureScope before use.
 class CpuFeatures : public AllStatic {
  public:
   // Detect features of the target CPU. Set safe defaults if the serializer
   // is enabled (snapshots must be portable).
   static void Probe();
 
+  // Display target use when compiling.
+  static void PrintTarget();
+
+  // Display features.
+  static void PrintFeatures();
+
   // Check whether a feature is supported by the target CPU.
   static bool IsSupported(CpuFeature f) {
     ASSERT(initialized_);
-    if (f == VFP3 && !FLAG_enable_vfp3) return false;
-    if (f == SUDIV && !FLAG_enable_sudiv) return false;
-    if (f == UNALIGNED_ACCESSES && !FLAG_enable_unaligned_accesses) {
-      return false;
-    }
-    if (f == VFP32DREGS && !FLAG_enable_32dregs) return false;
     return (supported_ & (1u << f)) != 0;
   }
 
   static bool IsFoundByRuntimeProbingOnly(CpuFeature f) {
     ASSERT(initialized_);
     return (found_by_runtime_probing_only_ &
             (static_cast<uint64_t>(1) << f)) != 0;
   }
 
   static bool IsSafeForSnapshot(CpuFeature f) {
@@ skipping 1363 matching lines @@
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_