[ic] Introduce BOOLEAN state for CompareIC.

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 3228 matching lines @@
   __ Push(code_);
   __ CallRuntime(Runtime::kCharFromCode, 1);
   __ Mov(result_, x0);
   call_helper.AfterCall(masm);
   __ B(&exit_);
 
   __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase);
 }
 
 
+void CompareICStub::GenerateBooleans(MacroAssembler* masm) {
+  // Inputs are in x0 (lhs) and x1 (rhs).
+  DCHECK_EQ(CompareICState::BOOLEAN, state());
+  ASM_LOCATION("CompareICStub[Booleans]");
+  Label miss;
+
+  __ CheckMap(x1, x2, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK);
+  __ CheckMap(x0, x3, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK);
+  if (op() != Token::EQ_STRICT && is_strong(strength())) {
+    __ TailCallRuntime(Runtime::kThrowStrongModeImplicitConversion, 0, 1);
+  } else {
+    if (!Token::IsEqualityOp(op())) {
+      __ Ldr(x1, FieldMemOperand(x1, Oddball::kToNumberOffset));
+      __ AssertSmi(x1);
+      __ Ldr(x0, FieldMemOperand(x0, Oddball::kToNumberOffset));
+      __ AssertSmi(x0);
+    }
+    __ Sub(x0, x1, x0);
+    __ Ret();
+  }
+
+  __ Bind(&miss);
+  GenerateMiss(masm);
+}
+
+
 void CompareICStub::GenerateSmis(MacroAssembler* masm) {
   // Inputs are in x0 (lhs) and x1 (rhs).
   DCHECK(state() == CompareICState::SMI);
   ASM_LOCATION("CompareICStub[Smis]");
   Label miss;
   // Bail out (to 'miss') unless both x0 and x1 are smis.
   __ JumpIfEitherNotSmi(x0, x1, &miss);
 
   if (GetCondition() == eq) {
     // For equality we do not care about the sign of the result.
@@ skipping 2704 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64