A64: Let the MacroAssembler resolve branches to distant targets.

src/a64/instructions-a64.cc

 // Copyright 2013 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 212 matching lines @@
   }
   return offset;
 }
 
 
 Instruction* Instruction::ImmPCOffsetTarget() {
   return this + ImmPCOffset();
 }
 
 
+bool Instruction::IsValidImmPCOffset(ImmBranchType branch_type,
+                                     int32_t offset) {
+  return is_intn(offset, ImmBranchRangeBitwidth(branch_type));
+}
+
+
+bool Instruction::IsTargetInImmPCOffsetRange(Instruction* target) {
+  int offset = target - this;
+  return IsValidImmPCOffset(BranchType(), offset);
+}
+
+
 void Instruction::SetImmPCOffsetTarget(Instruction* target) {
   if (IsPCRelAddressing()) {
     SetPCRelImmTarget(target);
   } else if (BranchType() != UnknownBranchType) {
     SetBranchImmTarget(target);
   } else {
     SetImmLLiteral(target);
   }
 }
 
@@ skipping 70 matching lines @@
   uint64_t payload = ImmMoveWide();
   // TODO(all): If we extend ::InlineData() to support bigger data, we need
   // to update this method too.
   return payload;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64