ARM: clean up code now that ARMv6 is the baseline.

src/arm/constants-arm.h

 // Copyright 2011 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 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_ARM_CONSTANTS_ARM_H_
 #define V8_ARM_CONSTANTS_ARM_H_
 
 // ARM EABI is required.
 #if defined(__arm__) && !defined(__ARM_EABI__)
 #error ARM EABI support is required.
 #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_7A__) || \
     defined(__ARM_ARCH_7R__) || \
     defined(__ARM_ARCH_7__)
 # define CAN_USE_ARMV7_INSTRUCTIONS 1
 #ifndef CAN_USE_VFP3_INSTRUCTIONS
 # define CAN_USE_VFP3_INSTRUCTIONS
 #endif
 #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_5__)    || \
-    defined(__ARM_ARCH_5T__)   || \
-    defined(__ARM_ARCH_5TE__)  || \
-    defined(__ARM_ARCH_5TEJ__) || \
-    defined(CAN_USE_ARMV6_INSTRUCTIONS)
-# define CAN_USE_ARMV5_INSTRUCTIONS 1
-# define CAN_USE_THUMB_INSTRUCTIONS 1
-#endif
-
-// Simulator should support ARM5 instructions and unaligned access by default.
+// Simulator should support unaligned access by default.
 #if !defined(__arm__)
-# define CAN_USE_ARMV5_INSTRUCTIONS 1
-# define CAN_USE_THUMB_INSTRUCTIONS 1
-
 # ifndef CAN_USE_UNALIGNED_ACCESSES
 #  define CAN_USE_UNALIGNED_ACCESSES 1
 # endif
-
-#endif
-
-// Using blx may yield better code, so use it when required or when available
-#if defined(USE_THUMB_INTERWORK) || defined(CAN_USE_ARMV5_INSTRUCTIONS)
-#define USE_BLX 1
 #endif
 
 namespace v8 {
 namespace internal {
 
 // Constant pool marker.
 // Use UDF, the permanently undefined instruction.
 const int kConstantPoolMarkerMask = 0xfff000f0;
 const int kConstantPoolMarker = 0xe7f000f0;
 const int kConstantPoolLengthMaxMask = 0xffff;
@@ skipping 688 matching lines @@
   static int Number(const char* name, bool* is_double);
 
  private:
   static const char* names_[kNumVFPRegisters];
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CONSTANTS_ARM_H_