[ic] Introduce BOOLEAN state for CompareIC.

src/x64/code-stubs-x64.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_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 3338 matching lines @@
     __ Assert(equal, kExpectedAllocationSite);
   }
 
   // Tail call into the stub that handles binary operations with allocation
   // sites.
   BinaryOpWithAllocationSiteStub stub(isolate(), state());
   __ TailCallStub(&stub);
 }
 
 
+void CompareICStub::GenerateBooleans(MacroAssembler* masm) {
+  DCHECK_EQ(CompareICState::BOOLEAN, state());
+  Label miss;
+  Label::Distance const miss_distance =
+      masm->emit_debug_code() ? Label::kFar : Label::kNear;
+
+  __ JumpIfSmi(rdx, &miss, miss_distance);
+  __ movp(rcx, FieldOperand(rdx, HeapObject::kMapOffset));
+  __ JumpIfSmi(rax, &miss, miss_distance);
+  __ movp(rbx, FieldOperand(rax, HeapObject::kMapOffset));
+  __ JumpIfNotRoot(rcx, Heap::kBooleanMapRootIndex, &miss, miss_distance);
+  __ JumpIfNotRoot(rbx, Heap::kBooleanMapRootIndex, &miss, miss_distance);
+  if (op() != Token::EQ_STRICT && is_strong(strength())) {
+    __ TailCallRuntime(Runtime::kThrowStrongModeImplicitConversion, 0, 1);
+  } else {
+    if (!Token::IsEqualityOp(op())) {
+      __ movp(rax, FieldOperand(rax, Oddball::kToNumberOffset));
+      __ AssertSmi(rax);
+      __ movp(rdx, FieldOperand(rdx, Oddball::kToNumberOffset));
+      __ AssertSmi(rdx);
+      __ xchgp(rax, rdx);
+    }
+    __ subp(rax, rdx);
+    __ Ret();
+  }
+
+  __ bind(&miss);
+  GenerateMiss(masm);
+}
+
+
 void CompareICStub::GenerateSmis(MacroAssembler* masm) {
   DCHECK(state() == CompareICState::SMI);
   Label miss;
   __ JumpIfNotBothSmi(rdx, rax, &miss, Label::kNear);
 
   if (GetCondition() == equal) {
     // For equality we do not care about the sign of the result.
     __ subp(rax, rdx);
   } else {
     Label done;
@@ skipping 2172 matching lines @@
                            kStackSpace, nullptr, return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64