Update with a hopefully complete list of macros...

src/arm/constants-arm.h

 // Copyright 2009 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 25 matching lines @@
 # define USE_ARM_EABI 1
 #endif
 
 // This means that interwork-compatible jump instructions are generated.  We
 // want to generate them on the simulator too so it makes snapshots that can
 // be used on real hardware.
 #if defined(__THUMB_INTERWORK__) || !defined(__arm__)
 # define USE_THUMB_INTERWORK 1
 #endif
 
-#if defined(__ARM_ARCH_5T__) || \
-    defined(__ARM_ARCH_5TE__) || \
-    defined(__ARM_ARCH_6__) || \
-    defined(__ARM_ARCH_7A__) || \
+#if defined(__ARM_ARCH_7A__) || \
+    defined(__ARM_ARCH_7R__) || \
     defined(__ARM_ARCH_7__)
+# define CAN_USE_ARMV7_INSTRUCTIONS 1
+#endif
+
+#if defined(__ARM_ARCH_6__) ||   \
+    defined(__ARM_ARCH_6J__) ||  \
+    defined(__ARM_ARCH_6K__) ||  \
+    defined(__ARM_ARCH_6Z__) ||  \
+    defined(__ARM_ARCH_6ZK__) || \
+    defined(__ARM_ARCH_6T2__) || \
+    defined(CAN_USE_ARMV7_INSTRUCTIONS)
+# define CAN_USE_ARMV6_INSTRUCTIONS 1
+#endif
+
+#if defined(__ARM_ARCH_5T__)            || \
+    defined(__ARM_ARCH_5TE__)           || \
+    defined(CAN_USE_ARMV6_INSTRUCTIONS)
 # define CAN_USE_ARMV5_INSTRUCTIONS 1
 # define CAN_USE_THUMB_INSTRUCTIONS 1
 #endif
 
-#if defined(__ARM_ARCH_6__) || \
-    defined(__ARM_ARCH_7A__) || \
-    defined(__ARM_ARCH_7__)
-# define CAN_USE_ARMV6_INSTRUCTIONS 1
-#endif
-
-#if defined(__ARM_ARCH_7A__) || \
-    defined(__ARM_ARCH_7__)
-# define CAN_USE_ARMV7_INSTRUCTIONS 1
-#endif
-
 // Simulator should support ARM5 instructions.
 #if !defined(__arm__)
 # define CAN_USE_ARMV5_INSTRUCTIONS 1
 # define CAN_USE_THUMB_INSTRUCTIONS 1
 #endif
 
 namespace assembler {
 namespace arm {
 
 // Number of registers in normal ARM mode.
@@ skipping 259 matching lines @@
   static const char* Name(int reg);
 
  private:
   static const char* names_[kNumVFPRegisters];
 };
 
 
 } }  // namespace assembler::arm
 
 #endif  // V8_ARM_CONSTANTS_ARM_H_