[a64] Implement LStringCompareAndBranch

src/a64/lithium-codegen-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 4716 matching lines @@
   __ Mov(result, 0);
 
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
   __ SmiTag(char_code);
   __ Push(char_code);
   CallRuntimeFromDeferred(Runtime::kCharFromCode, 1, instr);
   __ StoreToSafepointRegisterSlot(x0, result);
 }
 
 
+void LCodeGen::DoStringCompareAndBranch(LStringCompareAndBranch* instr) {
+  Token::Value op = instr->op();
+
+  Handle<Code> ic = CompareIC::GetUninitialized(isolate(), op);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  InlineSmiCheckInfo::EmitNotInlined(masm());
+
+  Condition condition = TokenToCondition(op, false);
+
+  EmitBranch(instr, condition);
+}
+
+
 void LCodeGen::DoStringLength(LStringLength* instr) {
   Register string = ToRegister(instr->string());
   Register result = ToRegister(instr->result());
   __ Ldr(result, FieldMemOperand(string, String::kLengthOffset));
 }
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
   Register result = ToRegister32(instr->result());
@@ skipping 391 matching lines @@
   __ Bind(&out_of_object);
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal